TABEL KONVERSISymbol Ł § digits (H) Legend Definition exactly equal to approximately equal to indicates that digits repeat infinitely (e.g. 8.294369 corresponds to 8.294369369369369«) of chiefly historical interest [edit] Length Length Definition Ł 1×10í10 m § Distance from Earth to Sun = ѿ in (see note above about rounding) Ł Bohr radius of hydrogen Ł 608 ft Ł 1/10 nmi Ł 720 ft ch ell fm fm Ł 66 ft(US) Ł 4 rods [3] Ł Distance from fingers to elbow § 18 in Ł 45 in [4] (In England usually) Ł 6 ft [4] Ł 1×10í15 m[4] Ł 7/8 in Ł 4½ in Name of unit ångström astronomical unit barleycorn (H) Å Symbol Relation to SI units Ł 0.1 nm § 149597871464 m [1] § 8.46×10 í3 m § 5.2917720859×10 í11 ± 3.6×10í20 m [2] § 185.3184 m Ł 185.2 m = 219.456 m § 20.11684 m § 0.5 m = 1.143 m = 1.8288 m Ł 1×10í15 m = 0.022225 m = 0.1143 m § 0.304799735 m § 0.3047972654 m AU bohr, atomic unit of a0 length cable length (Imperial) cable length (International) cable length (U.S.) chain (Gunter's; Surveyor's) cubit (H) ell (H) fathom fermi finger finger (cloth) foot (Benoît) (H) foot (Clarke's; Cape) (H) foot (Indian) (H) foot (International) foot (Sear's) (H) foot (U.S. Survey) french; charriere furlong hand inch (International) league (land) light-day ft (Ben) ft (Cla) ft Ind ft ft (Sear) ft (US) F fur in lea Ł 1/3 yd Ł 0.3048 m Ł 12 inches Ł 1200»3937 m [5] Ł 1»3 mm Ł 10 chains = 660 ft = 220 yd [4] Ł 4 in [4] Ł 1/36 yd Ł 1/12 ft Ł 3 US Statute miles [3] Ł 24 light-hours § 0.304799514 m Ł 0.3048 m § 0.30479947 m § 0.304800610 m = 0.3 = 201.168 m Ł 0.1016 m Ł 0.0254 m = 4828.032 m Ł 2.59020683712×10 13 light-hour light-minute light-second light-year line link (Gunter's; Surveyor's) link (Ramsden's; Engineer's) ly ln lnk lnk Ł 60 light-minutes Ł 60 light-seconds Ł Distance light travels in one second in vacuum Ł Distance light travels in vacuum in 365.25 days [6] Ł 1/12 in [7] Ł 1/100 ch [4] Ł 0.66 ft Ł 7.92in Ł 1 ft [4] m Ł 1.0792528488×10 12 m Ł 1.798754748×10 10 m Ł 299792458 m = 9.4607304725808×10 15 m = 0.002116 m = 0.201168 m = 0.3048 m metre (SI base unit) m mickey micron mil; thou µ mil Ł Distance light travels in 1»299792458 of a second in vacuum.[8] Ł1m § 1»10000000 of the distance from equator to pole. = 1.27×10í4 Ł 1»200 in m Ł 1×10í6 m Ł 1×10í3 Ł 2.54×10í5 in m Ł 10 km Ł 6082 ft Ł 80 chains Ł 5280 ft Ł 1760 yd Ł 6000 ft Ł 6087 ft Ł 5280 US Survey feet Ł (5280 × m Ł 2¼ in [4] Ł 1×10í9 m Ł 3 nmi [4] = 6080 ft Ł 1852 m [9] Ł 1853.248 m Ł 2.5 ft [4] Ł 3 in [4] Distance of star with parallax shift of one arc second from a base of one astronomical unit Ł 12 points = 10000 m = 1853.7936 m Ł 1609.344 m Ł 1828.8 m = 1855.3176 m 1200 mil (Sweden and mil Norway) mile (geographical) (H) mile (international) mi mile (tactical or data) mile (telegraph) (H) mi mile (U.S. Survey) nail (cloth) nanometer nm mi »3937) § 1609.347219 m = 0.057 15 m Ł 1×10í9 m = 5556 m = 1853.184 m Ł 1852 m Ł 1853.248 m = 0.762 m = 0.0762 m § 3.085 677 82×10 16 ± 6×106 m [10] Dependent on point nautical league NL; nl nautical mile NM (Adm); (Admiralty) nmi (Adm) nautical mile NM; nmi (international) nautical mile (US pre 1954) pace palm parsec pica pc S. pt pt pt rd rope After 1878: Ł 5/133 cm Ł 1/72 in Ł 1/72.685 642 24 m2 sq ch .618 742×10 7 m2 = 7.27 in Ł ¼ yd Ł 16½ ft Ł 20 ft [4] Ł 9 in [4] Ł 2 in pm twp xu yd Ł 1/1440 in Ł 0. also ac 43560 sq ft. pole.000 351 4598 m = 0.2286 m Ł 1×1012 m = 0.486 448 64 m2 = 1 000 m2 § 101.0021×10 í13 m [4] Ł 0.measures.0292 m = 6. survey) are barn barony board boiler horsepower equivalent direct radiation circular inch circular mil.067 075×10 í10 m2 = 1.000 375 97 m.2286 m = 5.9144 m [5] Ł 3 ft Ł 36 in § 0.589 988 110 336×10 6 m2 = 10í52 m2 = 9.714 1056 m2 = 2.0508 m Ł 1×10í12 m = 1. English) [11][12] point (Didot.096 m = 0.958 174 m2 § 5. a Ł 100 m2 b Ł 10í28 m2 Ł 4000 ac bd Ł 1 in × 1 ft bhp Ł (1 ft2 ) (1 bhp) / (240 BTUIT/h) EDR circ in Ł ʌ/4 sq in circ mil Ł ʌ/4 mil2 Ł 192 bd Ł 1 000 m2 Ł 121 sq yd ha Ł 10 000 m2 § 120 ac (variable) ro Ł ¼ ac Ł 1 mi × 1 mi Ł 10í52 m2 Ł 10 ft × 10 ft Ł 66 ft × 66 ft = 1/10 ac Relation to SI units Ł 4 046.000 375 939 85 m = 0. perch (H) rope (H) span (H) spat [14] stick (H) stigma. After 1878: § 0.9144 m [edit] Area Area Name of unit acre (international) acre (U. siegbahn yard (International) pt Ł 1/72. circular thou cord dunam guntha hectare hide rood section shed square (roofing) square chain (international) Symbol Definition ac Ł 1 ch × 10 ch = 4840 sq yd Ł 10 sq ch = 4840 sq yd.290 304 m2 Ł 404.741 92×10 í3 m2 § 12.856 4224 m2 § 4 046. point (American.000 351 450 m § 0. European) [12][13] point (PostScript) [11] point (TeX) [11] quarter rod.272 in Ł 1/12 × 1/72 of pied du roi.067 075×10 í4 m2 § 5.873 m2 [15] = 100 m2 = 10í28 m2 § 1.17 m2 Ł 10 000 m2 § 5×105 m2 = 1 011.7638×10 í5 m § 1.000 352 7 m = 0. bicron (picometre) twip x unit. 387 064×10 í6 m3 Ł 1 m3 .589 998 47×10 6 m2 = 25.046 856 4224×10 í2 m2 § 4.290 304×10 í2 m2 § 9.S.S. Survey) square rod/pole/perch square yard (International) stremma township yardland sq ch sq ft sq ft sq in km2 sq lnk sq lnk sq lnk m2 sq mil sq mi sq mi sq rd sq yd Ł 66 ft(US) × 66 ft(US) = 1/10 ac Ł 1 ft × 1 ft Ł 1 ft (US) × 1 ft (US) Ł 1 in × 1 in Ł 1 km × 1 km Ł 1 lnk × 1 lnk Ł 0.66 ft × 0. Survey) square foot square foot (U.4516×10 í10 m2 = 2.163 659 24 m3 = 0.836 127 36 m2 = 1 000 m2 § 9.42 cu in Ł 126 gal (wine) Ł 4 bu (Imp) Ł 8 ft × 4 ft × 4 ft Ł 16 cu ft cu fm Ł 1 fm × 1 fm × 1 fm cu ft Ł 1 ft × 1 ft × 1 ft cu in Ł 1 in × 1 in × 1 in 3 m Ł1 m×1 m× 1 m Name of unit acre-foot acre-inch barrel (Imperial) barrel (petroleum) barrel (U.290 341 161 327 49×10í2 m2 Ł 6. Survey) square inch square kilometre square link (Gunter's)(International) square link (Gunter's)(US Survey) square link (Ramsden's) square metre (SI unit) square mil. dry heaped) bushel (U.S.046 872×10 í2 m2 = 0.323 994×10 7 m2 § 1.035 239 070 166 88 m3 = 0.790 153 128 96 m 3 = 0.292 852 64 m2 Ł 0.036 368 72 m3 = 0.119 240 471 196 m 3 Ł 2.4516×10 í4 m2 = 106 m2 = 4.116 438 863 872 m 3 Ł 0.624 556 363 776 m3 = 0.044 048 837 7086 m 3 = 0.028 316 846 592 m 3 Ł 16.453 069 545 472 m 3 = 6. bbl Ł 42 gal (US) Ł 105 qt (US) = 105/32 bu bl (US) (US lvl) fl bl (US) Ł 31½ gal (US) fbm Ł 144 cu in bkt Ł 4 gal (Imp) bu (Imp) Ł 8 gal (Imp) bu (US) Ł 1 ¼ bu (US lvl) bu (US lvl) Ł 2 150.S.481 837 547 52 m3 = 102. square thou square mile square mile (U.09290304 m2 = 1 m2 = 6.158 987 294 928 m 3 = 0.018 184 36 m3 = 0. pipe coomb cord (firewood) cord-foot cubic fathom cubic foot cubic inch cubic metre (SI unit) Relation to SI units = 1 233.66 ft(US) × 0.359 737 216×10 í3 m3 = 0. dry level) butt.687 3 m2 Ł 9.S.S.476 961 884 784 m3 = 0.145 474 88 m3 = 3. fluid) board-foot bucket (Imperial) bushel (Imperial) bushel (U.square chain (U. dry) barrel (U.S.66 ft(US) Ł 1 lnk × 1 lnk Ł 1 ft × 1 ft Ł1m×1m Ł 1 mil × 1 mil Ł 1 mi × 1 mi Ł 1 mi (US) × 1 mi (US) Ł 1 rd × 1 rd Ł 1 yd × 1 yd Ł 1 000 m2 Ł 36 sq mi (US) § 30 ac § 404.2×105 m2 [edit] Volume Volume Symbol Definition ac ft Ł 1 ac x 1 ft = 43 560 ft 3 Ł 1 ac × 1 in bl (Imp) Ł 36 gal (Imp) bl.115 628 198 985 075 m 3 = 0.66 ft Ł 1 lnk × 1 lnk Ł 0.589 988 110 336×106 m2 § 2. 082 3568×10 í6 m3 Ł 9 gal (US) = 0.838 776 0416×10 í6 m3 Ł 1/288 fl oz (Imp) = 98.573 529 5625×10 í6 m3 Ł 3×10í5 Ł 4 US fl oz Ł 2 bl (Imp) Ł 2 fl bl (US) Ł 1½ US fl oz Ł 18 gal (Imp) Ȝ Ł 1 mm3 Ł 80 bu (Imp) L Ł 1 dm3 [17] Ł 50 cu ft Ł 1/480 fl oz (Imp) = 1/60 fl min dr (Imp) Ł 1/480 US fl oz = 1/60 US fl min dr fl oz (Imp) Ł 1/160 gal (Imp) US fl oz Ł 1/128 gal (US) US fl oz Ł 30 mL[16] .S. food nutrition labeling) c (US) dash (Imperial) dash (U.S.785 411 784×10 í3 m3 Ł 1 mi × 1 mi × 1 mi Ł 5 fl oz (Imp) = 142.36×10 í6 m3 = 0.415 842 3296 m3 = 59.193 880 208 3×10 í9 m3 = 61.764 554 857 984 m 3 Ł 10 fl oz (Imp) = 284.413 0625×10 í6 m3 Ł 29.404 883 770 86×10 í3 m3 Ł 231 cu in Ł 3.S.) dessertspoon (Imperial) drop (Imperial) drop (Imperial) (alt) drop (medical) drop (metric) drop (U. food nutrition gtt gtt gtt gtt fl dr fl dr fl s beer gal gal (Imp) gal (US) gal (US) gi (Imp). customary) cu mi cu yd c (CA) c c (US) cup (U.909 4976 m3 Ł 0.S.S. fluidram fluid scruple (Imperial) gallon (beer) gallon (Imperial) gallon (U.656 467 013 8×10 í9 m3 Ł 1/1 824 gi (Imp) § 77. Wine) gill (Imperial). customary) ounce (fluid U.961 751 302 08 3×10 í9 (Imp) m3 Ł 1/96 US fl oz = ½ US = 308.130 625×10 í6 m3 Ł 8 fl oz (Imp) = 227.) (alt) fifth firkin fluid drachm (Imperial) fluid dram (U.081 829 62 m3 = 1×10í9 m3 = 2.238 480 942 392 m 3 § 44.3045×10 í6 m3 Ł 250. U. fluid.) ounce (fluid Imperial) ounce (fluid U. dry) gallon (U. nog gi (US) hhd (Imp) hhd (US) Ł 4 168 181 825.854 231×10 í9 m3 Ł 1/5 US gal = 757.4×10í4 Ł 240 mL[16] m3 Ł 1/384 gi (Imp) = ½ pinch = 369.294 118 25×10 í6 m3 = 0.0×10í9 m3 Ł 1/360 US fl oz = 82.S.551 632 8125×10 í6 m3 Ł ǩ US fl oz = 3.001 m3 = 1. Noggin gill (U.S.S.03×10 í9 m3 Ł 1/20 mL = 50.) jigger (bartending) kilderkin lambda last litre load minim (Imperial) minim (U.546 09 L Ł 4.588 2365×10 í6 m3 = 2.).886 684×10 í9 m3 Ł 1/12 ml = 83.611 519 921 875×10 í9 m3 Ł 28.183 877 60416×10 í6 m3 Ł 282 cu in = 4.S.cubic mile cubic yard cup (breakfast) cup (Canadian) cup (metric) cup (U.148 693 22916×10 í9 m3 Ł 1/456 US fl oz § 64.S.546 09×10 í3 m3 Ł ǩ bu (US lvl) = 4.621 152 048×10 í3 m3 Ł 4.S.) hogshead (Imperial) hogshead (U.065 3125×10 í6 m3 = 118.034 068 706 056 m 3 Ł ǩ fl oz (Imp) = 3.0×10 í6 m3 Ł 8 US fl oz Ł 1/16 gal (US) = 236.440 579 584 m3 Ł 27 cu ft Ł 0.327 318 48 m3 = 0.S.) drop (U.S.0×10 í6 m3 = 250.696 691 195 3125×10 í6 m3 Ł 1/24 fl oz (Imp) = 1.S.057 599 609 375×10 í9 pinch m3 Ł 1/12 gi (Imp) = 11. S.290 949 76 m3 = 2. customary) tablespoon (U.132 673 863 68 m3 = 1.labeling) peck (Imperial) peck (U.0×10í6 m3 = 14.281 912 561 335 04 m3[citation needed ] § 29.273 045×10 í3 m3 = 1.0×10í6 m3 Ł 1/6 US fl oz Ł 5 mL[16] Ł 1 cu ft Ł 35 cu ft Ł 40 cu ft Ł 28 bu (Imp) Ł 252 gal (wine) Ł 40 bu (US lvl) m3 = 9.S.) pint (Imperial) pint (U. fluid) pony pottle.S.101 220 942 715×10 í3 m3 = 946. quartern quart (Imperial) quart (U.809 767 541 72×10 í3 m3 = 0.928 921 595×10 í6 m3 = 5×10í6 m3 = 0.S.) pk pk per Ł 2 gal (Imp) Ł ¼ US lvl bu Ł 16½ ft × 1½ ft × 1 ft Ł 1/192 gi (Imp) = ǩ tsp (Imp) Ł 1/48 US fl oz = ǩ US tsp pt (Imp) Ł ǩ gal (Imp) Ł 1/64 bu (US lvl) Ł ǩ gal pt (US dry) (US dry) pt (US fl) Ł ǩ gal (US) Ł 3/4 US fl oz Ł ½ gal (Imp) = 80 fl oz (Imp) qt (Imp) Ł ¼ gal (Imp) Ł 1/32 bu (US lvl) = ¼ gal qt (US) (US dry) qt (US) Ł ¼ gal (US fl) Ł 8 bu (Imp) Ł 100 cu ft Ł 3 bu (Imp) Ł 3 bu (US lvl) Ł 8 bu (US lvl) Ł 1 US fl oz Ł 2 bu (Imp) Ł 2 bu (US lvl) tbsp tbsp tbsp tbsp tsp tsp tsp tsp Ł ½ fl oz (Imp) Ł 5/8 fl oz (Imp) Ł ½ US fl oz Ł 15 mL[16] Ł 1/6 fl oz (Imp) Ł 1/24 gi (Imp) Ł 5. customary) teaspoon (U.0×10í6 m3 = 4. dry) quart (U.409 562 806 6752 m 3 . dry) pint (U.S. food nutrition labeling) teaspoon (Canadian) teaspoon (Imperial) teaspoon (metric) teaspoon (U. bag sack (U.018 324 16 m3 = 0.831 684 6592 m3 = 0.923 502 60416×10 í9 m3 = 616.57×10 í6 m3 = 0.115 199 218 75×10 í9 m3 = 568.092 18×10 í3 m3 = 8.109 106 16 m3[citation needed ] = 0.919 388 02083×10 í6 m3 = 5.S.786 764 7825×10 í6 m3 = 1.105 717 210 500 64 m3 = 0.5×10í5 m3 = 4.S.S.991 089 630 72 m3 = 1.953 923 769 568 m 3 = 1. food nutrition labeling) timber foot ton (displacement) ton (freight) ton (water) tun wey (U. fluid) quarter. dry) perch pinch (Imperial) pinch (U.S.758 164 0625×10 í6 m3 Ł 15.028 316 846 592 m 3 = 0.352 946×10 í6 m3 = 0.072 737 44 m3 = 0.070 478 140 333 76 m3 Ł 20.) tablespoon (Australian metric) tablespoon (Canadian) tablespoon (Imperial) tablespoon (metric) tablespoon (U.700 841 953 152 m 3 = 739.180 147 171 875×10 í6 m3 = 2.S.136 5225×10 í3 m3 = 1.735 510 416×10 í6 m3 = 5.) seam shot strike (Imperial) strike (U.S.0×10í6 m3 = 14.206 531 25×10 í6 m3 = 17.610 471 3575×10 í6 m3 = 473.261 25×10 í6 m3 = 550. pail register ton sack (Imperial).176 473×10 í6 m3 = 22.S.S. One full revolution encompasses 2ʌ radians. the pound of mass is sometimes written lbm to distinguish it from the pound-force (lbf). moa ' arcsecond centesimal minute of arc centesimal second of arc " ' " degree (of arc) ° grad. gon octant quadrant radian (SI unit) rad sextant sign grad [edit] Solid angle Solid angle Name of unit Symbol Definition The solid angle subtended at the center of a sphere of radius r by a portion of the surface of the sphere having an area r2.523 599 rad arcminute.848 137×10 í6 rad § 0.570 796 rad = 1 rad § 1.157 080×10 í3 rad § 1. A sphere encompasses 4ʌ sr.785 398 rad § 1.047 198 rad § 0. the unit gee is used to denote standard gravity in order to avoid confusion with the "g" symbol for grams. Ł 60° Ł 30° Definition Relation to SI units § 0.570 796×10 í6 rad § 17. Mass .707 963×10 í3 rad § 0.290 888×10 í3 rad § 4. In physics.[14] Relation to SI units = 1 sr steradian (SI sr unit) [edit] Mass Notes: y y y See Weight for detail of mass/weight distinction and conversion. In this table.981 748×10 í3 rad § 0.[edit] Plane angle Plane angle Name of unit Symbol angular mil µ Ł 2ʌ/6400 rad Ł 1°/60 Ł 1°/3600 Ł 1 grad/100 Ł 1 grad/(10 000) Ł 1/360 of a revolution Ł ʌ/180 rad Ł 1/400 of a revolution Ł 2ʌ/400 rad Ł 0.453 293×10 í3 rad § 15. It should not be read as the mongrel unit "pound metre". gradian.9° Ł 45° Ł 90° The angle subtended at the center of a circle by an arc whose length is equal to the circle's radius. 806 65 kg Ł 1 kg (SI base unit)[8] = 453.798 91 mg Ł 1 kg = 50. pwt lb av lb t q s ap .637 682 78 kg = 20 411.887 9346 g = 1.239 9455 mg = 50 mg = 31.660 902 10×10 í27 ± 1. electron rest mass bag (coffee) bag (Portland cement) barge carat carat (metric) clove crith dalton dram (apothecary.109 382 15×10 í31 ± 45×10í39 kg [18] = 60 kg = 42. food nutrition labeling) pennyweight point pound (avoirdupois) pound (metric) pound (troy) quarter (Imperial) quarter (informal) quarter.3×10í36 kg = 3. unified atomic unit of mass.011 7272 kg = 100 kg = 1.3×10í36 kg § 9. cental hyl (CGS unit) hyl (MKS unit) kilogram kip mark mite mite (metric) ounce (apothecary.103 4768 g = 28. troy) dram (avoirdupois) electronvolt gamma grain grave hundredweight (long) hundredweight (short).373 241 7216 kg = 12.453 592 37 kg = 7000 grains Ł 500 g Ł 5 760 grains Ł 1/4 long cwt = 2 st = 28 lb av Ł ¼ short tn Ł ¼ long tn Ł 100 kg Ł 20 gr kg kip oz t oz av oz dwt.802 345 44 kg = 45.359 237 kg = 9.771 845 195 3125 g = 1. long (informal) quintal (metric) scruple (apothecary) Symbol u.592 37 kg = 248.555 173 84 g = 2 mg Ł 0.806 65 g = 9. AMU me Ł 60 kg Ł 94 lb av Ł 22½ sh tn Ł 3 1/6 gr Ł 200 mg Ł 8 lb av Definition kt ct Da dr t dr av eV Ȗ gr G Ł 60 gr Ł 27 11/32 gr Ł 1 eV (energy unit) / c2 Ł 1 ȝg Ł 1/7000 lb av grave was the original name of the kilogram Relation to SI units § 1.196 548 333 mg = 200 mg = 3.295 9782 g long cwt or Ł 112 lb av cwt sh cwt Ł 100 lb av Ł 1 gee × 1 g × 1 s2/m Ł 1 gee × 1 kg × 1 s2/m Ł mass of the prototype near Paris (§ mass of 1L of water) Ł 1000 lb av Ł 8 oz t Ł 1/20 gr Ł 1/20 g Ł 1/12 lb t Ł 1/16 lb Ł 28 g[16] Ł 1/20 oz t Ł 1/100 ct Ł 0.349 523 125 g = 28 g = 1.453 592 37 kg = 500 g = 0.656 65 kg § 205.9349 mg § 1. troy) ounce (avoirdupois) ounce (U.827 8144 g = 3.660 538 73×10 í27 ± 1.Name of unit atomic mass unit.628 738 96 kg § 89.S.7826×10 í36 kg = 1 ȝg Ł 64.700 586 36 kg = 226.796 185 kg = 254. short tonne (mts unit) wey Zentner slug st AT AT long tn or ton sh tn t Ł 1/700 lb av Ł 1 gee × 1 lb av × 1 s2/ft Ł 14 lb av Ł 1 mg × 1 long tn ÷ 1 oz t Ł 1 mg × 1 sh tn ÷ 1 oz t Ł 2 240 lb Ł 2 000 lb Ł 1 000 kg Ł 252 lb = 18 st = 647.350 293 18 kg § 32.8264273 kg/m3 slug/ft3 Ł slug/ft3 § 515.418 884 254×10í17 s = 2.S. long ton.305 277 24 kg (variants exist) Ztr. assay (long) ton. Definitions vary.489151707 kg/m3 lb/ft3 Ł lb/ft3 § 16.01846337 kg/m3 § 2.9891 mg § 14.25 d Ł 100 a (see below for definition of year length) = 24 h Ł Time needed for the Earth to rotate once around its axis.184 74 kg = 1 000 kg = 114. geepound stone ton. fluid) slug per cubic foot Definition Relation to SI units Ł g/mL = 1.S. t Definition Ł a0/(Į·c) Name of unit Symbol atomic unit of time au Callippic cycle century day day (sidereal) decade fortnight c d d dec fn Ł 441 mo (hollow) + 499 mo (full) = 76 a of 365.[14] [edit] Density Density Symbol g/mL kg/m3 kg/L oz/ft3 Name of unit gram per millilitre kilogram per cubic metre (SI unit) kilogram per litre ounce (avoirdupois) per cubic foot ounce (avoirdupois) per cubic inch ounce (avoirdupois) per gallon (Imperial) ounce (avoirdupois) per gallon (U.046 9088 kg = 907.729994044×10 3 oz/in3 Ł oz/in3 kg/m3 oz/gal Ł oz/gal § 6. fluid) pound (avoirdupois) per cubic foot pound (avoirdupois) per cubic inch pound (avoirdupois) per gallon (Imperial) pound (avoirdupois) per gallon (U.767990471×10 4 lb/in3 Ł lb/in3 kg/m3 lb/gal Ł lb/gal § 99.000 kg/m3 Ł oz/ft3 § 1. determined from successive transits of a very § 86 164.77637266 kg/m3 lb/gal Ł lb/gal § 119.sheet slug.166 667 g = 1 016. assay (short) ton.236023291 kg/m3 oz/gal Ł oz/gal § 7.398 3776×10 9 s = 100 × year = 86400 s . see [19] and.1 s distant astronomical object across an observer's meridian (International Celestial Reference Frame) Ł 10 a (see below for definition of year length) = 10 × year Ł 2 wk = 1 209 600 s Relation to SI units § 2.000 kg/m3 Ł kg/m3 = 1 kg/m3 Ł kg/L = 1.001153961 kg/m3 § 1.666 667 g § 29.3788184 kg/m3 [edit] Time Time.593 903 kg = 6. or = 365.7632 s a.25 d average.25 d = 2922 d Ł (G /c5)½ = 3.256 363 d § 31 year (sidereal) yr respect to the stars of the celestial sphere 558 149. y.242 190 d § 31 year (tropical) yr same position in the cycle of seasons 556 925 s Where UTC is observed.524 608×108 s § 1.) mo month (hollow) month (synodic) octaeteris Planck time mo mo time of 9 192 631 770 periods of the radiation corresponding to the transition between the 2 hyperfine second s levels of the ground state of the caesium 133 atom at 0 (SI base unit) K[8] (but other seconds are sometimes used in astronomy) shake Ł 10í8 s = 10 ns í6 sigma Ł 10 s = 1 ȝs Sothic cycle Ł 1 461 a of 365 d = 4. calculated from common years (365 year (Julian) = 31 557 600 s yr d) plus one leap year (366 d) every four years a.016 s = 10 ms = 60 × 60 / 4 s = 900 s = 60 / 4 min = 15 min = 24 × 60 × 60 / 100 s = 864 s = 24 * 60 / 100 min = 14. or Ł Length of time it takes for the Sun to return to the § 365. the length of time units longer than 1 s may increase or decrease by 1 s if a leap second occurs during the time interval of interest. a. See leap year for details.3 s = 9.996 16×108 s = 1000 × year = 24 × 60 × 60 / 1 000 s = 86. calculated from common years a. y.530589 days (Average) = 48 mo (full) + 48 mo (hollow) + 3 mo (full) [21][22] = 8 a of 365.6297×10 6 s = 2 505 600 s § 2.4 min = 1.5768×108 s = 5. .2425/12 d = 30. enneadecaeteris millennium milliday minute moment month (full) h j ja Ł 1/1 080 h Ł 4 Callippic cycles .4 s = 60 s = 90 s = 2 592 000 s § 2.607 4096×10 10 s svedberg S Ł 10í13 s = 100 fs week wk Ł7d = 604 800 s = 365. Ł 90 s Ł 30 d[20] Average Gregorian month = 365.351 211 868×10í43 s month (Greg. av. lustrum Metonic cycle.1 d Ł 60 min Ł 1/60 s Ł 1/100 s Ł ¼ h = 1/96 d Ł 1/100 d Ł 5 a of 365 d Ł 110 mo (hollow) + 125 mo (full) = 6940 d § 19 a Ł 1 000 a (see below for definition of year length) md min mo Ł 1/1 000 d Ł 60 s.2425 d average.551×10 6 s = 2. y. y.helek Hipparchic cycle hour jiffy jiffy (alternate) ke (quarter of an hour) ke (traditional) lustre. or (365 d) plus leap years (366 d) on most years divisible = 31 556 952 s year (Gregorian) yr by 4. or Ł time taken for Sun to return to the same position with § 365. due to leap seconds sometimes 59 s or 61 s.593 424×109 s = 3 600 s = .436875 d Ł 29 d[20] Cycle time of moon phases § 29. 663 095×10 í4 m/s § 4.344 m/s = 299 792 458 m/s § 340 to 295 m/s at aircraft altitudes m/s mph mpm mps c speed of sound s in air A velocity consists of a speed combined with a direction.54×10 í2 m/s § 2.853 184 km/h [citation needed ] Definition Relation to SI units § 8.852 km/h Ł 1 NM (Adm)/h = 1.104719755 rad/s [edit] Speed or velocity Speed Name of unit Symbol foot per hour fph Ł 1 ft/h Ł 1 ft/min Ł 1 ft/s Ł furlong/fortnight Ł 1 in/min Ł 1 in/s Ł 1 km/h Ł 1 NM/h = 1.777 778×10 í1 m/s § 0.8224 m/s = 1 609.[edit] Frequency Frequency Name of unit hertz (SI unit) revolutions per minute Symbol Hz rpm Definition Ł Number of cycles per second Ł One unit rpm equals one rotation completed around a fixed axis in one minute of time. [edit] Flow (volume) .514 444 m/s = 0.08×10 í3 m/s = 3.23 333×10 í4 m/s = 2.514 773 m/s foot per minute fpm foot per second fps furlong per fortnight inch per minute ipm inch per second ips kilometre per km/h hour knot kn knot kn (Admiralty) mach number metre per second (SI unit) mile per hour mile per minute mile per second speed of light in vacuum M Ratio of the speed to the speed of sound in the medium. Relation to SI units = 1 Hz = 1/s § 0. About 1225 km/h (761 mph) in air at sea level to about 1062 km/h (660 mph) at jet altitudes. Unitless Ł 1 m/s Ł 1 mi/h Ł 1 mi/min Ł 1 mi/s Ł 299 792 458 m/s Varies especially with temperature. the speed part of the velocity takes units of speed. About 1225 km/h (761 mph) in air § 340 to 295 m/s for aircraft at sea level to about 1062 km/h (660 mph) at jet altitudes.466 667×10 í5 m/s = 5.048×10 í1 m/s § 1.447 04 m/s = 26. = 1 m/s = 0. Varies especially with temperature. 8224 m/s2 mile per second squared mps2 Ł 1 mi/s2 = 1.Relation to SI units = 4.609 344×10 3 m/s2 standard gravity g Ł 9. per second.051503273×10 í6 m3/s = 6.806 65 m/s2 = 9.806 65 mN A force capable of giving a mass of one kg an = 1 N = 1 kg·m/s2 acceleration of one metre per second. fluid) per hour GPH Ł 1 gal/h = 1.6×10í5 m3/s Name of unit Flow Symbol Definition [edit] Acceleration Acceleration Name of unit Symbol Definition Relation to SI units foot per hour per second fph/s Ł 1 ft/(h·s) § 8. gravet-force newton (SI unit) Symbol Ł me·Į2·c2/a0 dyn Ł g·cm/s2 kgf.S. Ł g × 1 000 lb klbf mGf.233 333×10 í4 m/s2 inch per second squared ips2 Ł 1 in/s2 = 2.[24] .238 722 06×10 í8 N [23] = 10í5 N = 9.381263638×10 í8 m3/s gallon (U. kip-force milligrave-force.719474432×10 í4 cubic foot per minute CFM Ł 1 ft3/min m3/s cubic foot per second ft3/s Ł 1 ft3/s = 0.806 65 m/s2 [edit] Force Force Name of unit atomic unit of force dyne (cgs unit) kilogram-force. fluid) per day GPD Ł 1 gal/d = 4. gf N Łg×1g Definition Relation to SI units § 8.S.028316846592 m3/s cubic inch per minute in3/min Ł 1 in3/min = 2.466 667×10 í5 m/s2 foot per minute per second fpm/s Ł 1 ft/(min·s) = 5.806 65 N = 4. kp.6387064×10 í5 cubic inch per second in3/s Ł 1 in3/s m3/s cubic metre per second (SI unit) m3/s Ł 1 m3/s = 1 m3/s gallon (U.144 444×10 í1 m/s2 metre per second squared (SI unit) m/s2 Ł 1 m/s2 = 1 m/s2 mile per hour per second mph/s Ł 1 mi/(h·s) = 4.30901964×10 í5 gallon (U.048×10 í1 m/s2 gal.448 221 615 2605×10 3 N = 9.S. grave-force kip.08×10 í3 m/s2 foot per second squared fps2 Ł 1 ft/s2 = 3.54×10 í2 m/s2 knot per second kn/s Ł 1 kn/s § 5. kipf.7311773×10 í7 m3/s = 1.4704×10 í1 m/s2 mile per minute per second mpm/s Ł 1 mi/(min·s) = 26. kilopond. fluid) per minute GPM Ł 1 gal/min 3 m /s litre per minute LPM Ł 1 L/min = 1. galileo Gal Ł 1 cm/s2 = 10í2 m/s2 inch per minute per second ipm/s Ł 1 in/(min·s) § 4. Ł g × 1 kg Gf kip. 386 389×10 3 Pa § 249.3224 Pa [25] = 9.1 Pa § 1.488 164 Pa [25] § 95.972 kg/m3 × 1 cm × g ftHg ftH2O inHg inH2 O Ł 13 595.972 kg/m3 × 1 in × g [25] § 98.448 230 531 N = 4.880 26 Pa [25] § 6.448 221 615 2605 N = 0.894 757×106 Pa § 0.1 kg/m3 × 1 cm × g Ł 1 kgf/cm2 Definition Relation to SI units Ł 101 325 Pa [25] = 9.972 kg/m3 × 1 ft × g Ł 13 595.98 °C) mmH2 O kgf/m2 pascal (SI unit) Pa Ł N/m2 = kg/(m·s2) pièze (mts unit) pz Ł 1 000 kg/m·s2 pound per square foot psf Ł 1 lbf/ft2 pound per square inch poundal per square foot short ton per square foot psi Ł 1 lbf/in2 [25] pdl/sq ft Ł 1 pdl/sq ft Ł 1 sh tn × g / 1 sq ft § 1.1 kg/m3 × 1 ȝm × g § 0.806 65×104 Pa [25] Ł 105 Pa = 0.999 972 millimetre of water (3.806 65×106 Pa [25] kgf/mm2 Ł 1 kgf/mm2 ksi Ł 1 kipf/sq in [25] § 6.001 torr millimetre of mercury mmHg Ł 13 595.1 kg/m3 × 1 mm × g § 1 torr § 999.988 98×103 Pa [25] [25] § 3.636 66×10 3 Pa § 2.806 38 Pa = 1 Pa [26] = 1×103 Pa = 1 kPa § 47.ounce-force pound pound-force poundal sthene (mts unit) ton-force ozf lb lbf pdl sn tnf Ł g × 1 oz Ł slug·ft/s2 Ł g × 1 lb Ł 1 lb·ft/s2 Ł 1 t·m/s2 Ł g × 1 sh tn = 0.138 254 954 376 N = 1×103 N = 8.1 kg/m3 × 1 ft × g § 999.894 757×10 3 Pa micron (micrometre) of mercury ȝmHg Ł 13 595.2 °F) inch of mercury (conventional) inch of water (39.333 22×103 Pa [25] cmH2 O § 999.760 518×10 3 Pa .082 Pa [25] = 9.972 kg/m3 × 1 mm × g = 0.2 °F) kilogram-force per square millimetre kip per square inch Symbol atm at bar Ł 1 dyn/cm2 cmHg Ł 13 595.1 kg/m3 × 1 in × g § 999.0638 Pa [25] § 40.896 443 230 521×103 N See also: Conversion between weight (force) and mass [edit] Pressure or mechanical stress Pressure Name of unit atmosphere (standard) atmosphere (technical) bar barye (cgs unit) centimetre of mercury centimetre of water (4 °C) foot of mercury (conventional) foot of water (39.133 3224 Pa [25] § 133.278 013 850 953 7812 N = 4. standard cubic yard electronvolt Symbol Definition 6 bboe § 5.101 971 621 N·m 2 2 Newton metre (SI unit) N·m Ł N × m = kg·m /s = 1 N·m [edit] Energy.899 100 534 Ł 1 BTUIT × 1 K/°R 716×103 J = 0.055 055 852 62×103 J § 1.12×10 9 J = 1. Ł 1 atm × 1 yd3 scy eV Łe×1V = 2.1855 J § 4.054 804×10 3 J § 1.9×10 í26 J .0545×10 3 J = 1.8×10 BTU59 °F BTUISO Ł 1.602 177 33×10 í19 ± 4.468 520 985 2288×10 3 J § 1. standard cubic centimetre cubic foot of atmosphere. or amount of heat Energy Name of unit barrel of oil equivalent British thermal unit (ISO) British thermal unit (International Table) British thermal unit (mean) British thermal unit (thermochemical) British thermal unit (39 °F) British thermal unit (59 °F) British thermal unit (60 °F) British thermal unit (63 °F) calorie (International Table) calorie (mean) calorie (thermochemical) calorie (3.869 204 480 9344×10 3 J = 1. Ł 1 atm × 1 ft3 scf Ł 1 000 BTUIT cu yd atm.214 011 009 380 48×10 í2 N·m inch-pound force in lbf Ł g × 1 lb × 1 in = 0.190 02 J @ 1 atm Ł 4.055 87×10 3 J § 1.059 67×10 3 J = 1.1868 J Ł 4.054 804×10 3 J Relation to SI units § 6.054 350×10 3 J § 1.98 °C) calorie (15 °C) calorie (20 °C) Celsius heat unit (International Table) cubic centimetre of atmosphere.98 °C cal15 °C cal20 °C CHUIT Ł 1. work.184 J = 4.355 817 948 331 4004 N·m foot-poundal ft pdl Ł 1 lb·ft2/s2 = 4.055 055 852 62×106 J = 77.184 J § 4.0545×10 3 J BTUIT BTUmean BTUth BTU39 °F BTU59 °F BTU60 °F BTU63 °F calIT calmean calth cal3.2045 J Ł 4.0546×10 3 J = 4.1819 J = 1.1868 J 1 »100 of the energy required to warm one gram of air-free water from 0 °C to 100 °C § 4.3224 Pa [25] [edit] Torque or moment of force Torque Name of unit Symbol Definition Relation to SI units foot-pound force ft lbf Ł g × 1 lb × 1 ft = 1. scc Ł 1 atm × 1 cm3 cu ft atm.112 984 829 027 6167 N·m metre kilogram m kg Ł N × m / g § 0.1855 J = 4.054 68×10 3 J § 1.101 325 J cc atm. standard cubic foot cubic foot of natural gas cubic yard of atmosphere.torr torr Ł 101 325/760 Pa § 133. Board of Trade Unit litre-atmosphere quad rydberg therm (E.4804×10 6 J = 4.868×10 9 J = 4.erg (cgs unit) foot-pound force foot-poundal gallon-atmosphere (imperial) gallon-atmosphere (US) hartree. sl Ł 1 g·cm2/s2 Ł g × 1 lb × 1 ft Ł 1 lb·ft2/s2 Ł 1 atm × 1 gal (imp) Ł 1 atm × 1 gal (US) Ł me·Į2·c2 (= 2 Ry) Ł 1 hp × 1 h = 10í7 J = 1.820 074 682 24 W = 2.355 817 948 331 4004 J = 4.1868×10 3 J Ł 1 kW × 1 h Ł 1 atm × 1 L Ł 1015 BTUIT = 3. Cal kW·h.325 J = 1.T.359 744×10 í18 J = 2.C.055 055 852 62×1018 J § 2.6×106 J = 101.) therm (U.214 011 009 380 48×10 í2 J = 460.505 585 262×106 J = 105.101 325 W = 0.184×10 9 J Ry Ł R·݄ ·c Ł 100 000 BTUIT th TCE TOE tTNT Ł 100 000 BTU59 °F Ł 1 McalIT Ł 7 Gcalth Ł 10 Gcalth Ł 1 Gcalth [edit] Power or heat flow rate Power Definition Ł 1 atm × 1 cm3/min Ł 1 atm × 1 cm3/s Ł 1 atm × 1 cu ft/h Ł 1 atm × 1 cu ft/min Ł 1 atm × 1 cu ft/s Ł 1 BTUIT/h Name of unit atmosphere-cubic centimetre per minute atmosphere-cubic centimetre per second atmosphere-cubic foot per hour atmosphere-cubic foot per minute atmosphere-cubic foot per second BTU (International Table) per hour Symbol atm ccm atm ccs atm cfh atm·cfm atm cfs BTUIT/h Relation to SI units = 1.179 872×10 í18 J = 105.797 001 244 704 W = 47.O.3076×10 9 J = 41. atomic unit of energy horsepower-hour inch-pound force joule (SI unit) kilocalorie.632 569 25 J = 383.[24] 1 W·s Ł 1 000 calIT = 4.U.869 204 480 9344×103 W § 0.688 75×10 í3 W = 0.684 519 537 696 172 792×10 6 J = 0.112 984 829 027 Ł g × 1 lb × 1 in 6167 J The work done when a force of one newton = 1 J = 1 m·N = moves the point of its application a distance 1 kg·m2/s2 = 1 C·V = of one metre in the direction of the force.293 071 W . large calorie kilowatt-hour. B.) thermie ton of coal equivalent ton of oil equivalent ton of TNT erg ft lbf ft pdl imp gal atm US gal atm Eh hp·h in lbf J kcal.S. l atm.1868×10 6 J = 29.556 849 0138 J § 4. 938 875×10 3 W § 3.325 W § 1.699 871 582 270 22 W = 735.810 657×10 3 W = 736 W = 746 W = 745.333×10 í4 W = 980.[24] W [edit] Action Action Name of unit Symbol Definition Relation to SI units atomic unit of action au Ł Ł ݄/2ʌ § 1.688 75 W = 101.355 817 948 331 4004 W § 9.337 057 W § 3 504 W § 3.133 789×10 í4 Pa·s lb/(ft·s) Ł 1 lb/(ft·s) § 1.488164 Pa·s Name of unit pascal second (SI unit) poise (cgs unit) pound per foot hour pound per foot second .665 W § 70.584 264 W = 1.498 75 W = 1. kg/(m·s) = 1 Pa·s P Ł 10í1 Pa·s = 0.516 853×10 3 W = 1 W = 1 J/s = 1 N·m/s = 1 kg·m2/s3 ft lbf/min Ł 1 ft lbf/min ft lbf/s bhp hp hp hp hp Ł 1 ft lbf/s § 34.054 571 68×10 í34 J·s[27] [edit] Dynamic viscosity Dynamic viscosity Symbol Definition Relation to SI units 2 Pa·s Ł N·s/m .1868 W § 3.5 lb/h × 970.766 161×10 í4 W = 2.BTU (International Table) per minute BTU (International Table) per second calorie (International Table) per second foot-pound-force per hour foot-pound-force per minute foot-pound-force per second horsepower (boiler) horsepower (European electrical) horsepower (Imperial electrical) horsepower (Imperial mechanical) horsepower (metric) litre-atmosphere per minute litre-atmosphere per second lusec poncelet square foot equivalent direct radiation ton of air conditioning ton of refrigeration (Imperial) ton of refrigeration (IT) watt (SI unit) BTUIT/min Ł 1 BTUIT/min BTUIT/s calIT/s ft lbf/h Ł 1 BTUIT/s Ł 1 calIT/s Ł 1 ft lbf/h § 17.3 BTUIT/lb Ł 75 kp·m/s Ł 746 W Ł 550 ft lbf/s Ł 75 m kgf/s L·atm/min Ł 1 atm × 1 L/min L·atm/s lusec p Ł 1 atm × 1 L/s Ł 1 L·µmHg/s [14] Ł 100 m kgf/s sq ft EDR Ł 240 BTUIT/h Ł 1 t ice melted / 24 h Ł 1 BTUIT × 1 lng tn/lb ÷ 10 min/s Ł 1 BTUIT × 1 sh tn/lb ÷ 10 min/s The power which in one second of time gives rise to one joule of energy.055 055 852 62×10 3 W = 4.259 696 580 552 334×10 í2 W = 1.1 Pa·s lb/(ft·h) Ł 1 lb/(ft·h) § 4. 3383 C § 3.478 352 81×10 í30 C·m[28] coulomb meter C·m =1C·1m í10 debye D = 10 esu·Å = 3. Fr. = 10 A § 3. emu Ł 10 C au C Łe Ł The amount of electricity carried in one second of time by one ampere of current. electromagnetic unit (cgs unit) atomic unit of charge coulomb (SI unit) faraday statcoulomb.pound-force second per square foot lbf·s/ft2 Ł 1 lbf·s/ft2 pound-force second per square inch lbf·s/in2 Ł 1 lbf·s/in2 § 47. franklin.757 Pa·s [edit] Kinematic viscosity Kinematic viscosity Name of unit Symbol Definition Relation to SI units square foot per second ft2/s Ł 1 ft2/s = 0.09290304 m2/s square metre per second (SI unit) m2/s Ł 1 m2/s = 1 m2/s stokes (cgs unit) St Ł 10í4 m2/s = 10í4 m2/s [edit] Electric current Electric current Name of unit Symbol Definition Relation to SI units ampere (SI base unit) A Ł The constant current needed to produce a force of 2 ×10í7 newton per metre between two straight parallel =1A conductors of infinite length and negligible circular cross[8] section placed one metre apart in a vacuum.33564095×10 í22 C·m .88026 Pa·s § 6. Ł (0. electrostatic unit (cgs unit) Symbol abC.[24] Ł 1 mol × NA·e Definition Relation to SI units = 10 C § 1.335641×10 í10 A electromagnetic unit.602 176 462×10í19 C = 1 C = 1 A·s § 96 485. abamp Ł 10 A abampere (cgs unit) esu per second. esu/s statampere (cgs unit) Ł (0.1 A·m) / c esu [edit] Electric dipole Electric dipole Name of unit Symbol Definition Relation to SI units atomic unit of electric dipole moment ea0 § 8.894.1 A·m/s) / c [edit] Electric charge Electric charge Name of unit abcoulomb.335 641×10í10 C F statC. [edit] Magnetic flux magnetic flux Name of Relation to SI Symbol Definition unit units maxwell Mx Ł 10í8 Wb[29] = 1×10 í8 Wb (CGS unit) Magnetic flux which.792 458 V = 1 V = 1 W/A = 1 kg·m2/(A·s3) [edit] Electrical resistance Electrical resistance Name of Symbol unit ohm (SI ȍ unit) Definition The resistance between two points in a conductor when one volt of electric potential difference. linking a circuit of one turn.[edit] Electromotive force. would produce weber (SI = 1 Wb = 1 V·s = 1 Wb in it an electromotive force of 1 volt if it were reduced to zero at a unit) kg·m2/(A·s2) uniform rate in 1 second. electromotive force Name of Symbol Definition unit abvolt abV Ł 1×10 í8 V (cgs unit) statvolt statV Ł c· (1 ȝJ/A·m) (cgs unit) The difference in electric potential across two points along a volt (SI conducting wire carrying one ampere of constant current when the V unit) power dissipated between the points equals one watt. applied to these points.[24] Relation to SI units = 1×10í8 V = 299. produces one ampere of current in the conductor.[24] [edit] Magnetic flux density What physicists call Magnetic field is called Magnetic flux density by electrical engineers and magnetic induction by applied mathematicians and electrical engineers. Name of unit Symbol Definition Relation to SI units 2 í4 í4 gauss (CGS unit) G Ł Mx/cm = 10 T = 1×10 T [30] tesla (SI unit) T Ł Wb/m2 = 1 T = 1 Wb/m2 = 1 kg/(A·s2 ) .[24] Relation to SI units = 1 ȍ = 1 V/A = 1 kg·m2/(A2·s3 ) [edit] Capacitance Capacitor's ability to store charge Name of Symbol unit farad (SI F unit) Definition Relation to SI units The capacitance between two parallel plates that results in one volt = 1 F = 1 C/V = 1 of potential difference when charged by one coulomb of A2·s4/(kg·m2) [24] electricity. electric potential difference Voltage. 655 952 (13)×10 í23 J/K = 23 bit kilobyte (decimal) kB Ł 1 000 B = 7. °Ra °R Ł K × 9/5 degree Réaumur °Ré degree Rømer °Rø Conversion to kelvin [K] Ł [°C] + 273. nepit nat Ł kB = 1. whereas the (discrete) storage space of digital devices is measured in bits. nip.67) × 5/9 [K] = [°N] × 100/33 + 273. . Temperature Name of unit Symbol Definition degree Celsius °C °C Ł K í 273. Sh Ł ln(2) × kB = 9.655 952 (13)×10í20 J/K = 8×103 bit = 8000 bit kilobyte (kibibyte) KB.380 650 5(23)×10 í23 J/K bit.15 [K] Ł [°R] × 5/9 [K] = [°Ré] × 5/4 + 273. b. KiB Ł 1 024 B = 7.15 í [°De] × 2/3 [K] Ł ([°F] + 459. information entropy is measured in shannons. Thus. shannon bit.16 of the thermodynamic temperature of the Ł1K triple point of water.15 [K] = 373.[edit] Inductance Inductance Name of Symbol unit henry (SI H unit) Definition The inductance of a closed circuit that produces one volt of electromotive force when the current in the circuit varies at a uniform rate of one ampere per second.179 065 3(53)×10 í23 J/K nibble Ł 4 bits = 3. hartley ban.5) × 40/21 + 273.827 976 0(64)×10 í23 J/K = 22 bit byte B Ł 8 bits = 7. Hart Ł ln(10) × kB = 3. [edit] Luminous intensity The candela is the preferred nomenclature for the SI unit.15 kelvin (SI base K unit) Ł 1/273.15 [K] = ([°Rø] í 7. see Temperature conversion.[8] [edit] Information entropy Information entropy Name of unit Symbol Definition Relation to SI units Relation to bits SI unit J/K Ł J/K = 1 J/K nat. The multiples of a bit listed above are usually used with this meaning.15 degree Delisle °De degree °F °F Ł °C × 9/5 + 32 Fahrenheit degree Newton °N degree Rankine °R.569 940 (16)×10 í24 J/K = 1 bit ban. uncompressed redundant data occupy more than one bit of storage per shannon of information entropy. Other times the bit is used as a measure of information entropy and is thus a synonym of shannon.839 695 (13)×10 í20 J/K = 213 bit = 8192 bit Often.[24] Relation to SI units = 1 H = 1 Wb/A = 1 kg·m2/(A·s)2 [edit] Temperature For more details on this topic. 981 cd.0031 lx lux (SI unit) lx Ł lm/m2 = 1 lx = 1 lm/m2 phot (CGS unit) ph Ł lm/cm2 = 1×104 lx [edit] Radiation .[31] Approximately 0.763910417 lx lumen per square inch lm/in2 Ł lm/in2 § 1.Luminous intensity Name of unit Symbol Definition Relation to SI units candela (SI base cd unit).[8] Ł cd The use of candlepower as a unit is discouraged due to its = 1 cd ambiguity.4262590996 cd/m2 lambert L Ł (104/ʌ) cd/m2 § 3.550.[33] . Varies and is poorly reproducible. pre-1948) cp cp The luminous intensity. of a source that emits monochromatic radiation of frequency 540×1012 hertz and that has a = 1 cd radiant intensity in that direction of 1/683 watt per steradian.183. in a given direction.7×1010 Bq [32] rutherford (H) rd Ł 1 MBq = 1×106 Bq Please note that although becquerel (Bq) and hertz (Hz) both ultimately refer to the same SI base unit (sí1).[14] § 0.source activity Radioactivity Name of unit Symbol Definition Relation to SI units becquerel (SI unit) Bq Ł Number of disintegrations per second = 1 Bq = 1/s curie Ci Ł 3. nit (deprecated[14]) cd/m2 Ł cd/m2 = 1 cd/m2 footlambert fL Ł (1/ʌ) cd/ft2 § 3. Hz is used only for periodic phenomena. lumen per square foot fc Ł lm/ft2 = 10. candle candlepower (new) candlepower (old.0988618 cd/m2 stilb (CGS unit) sb Ł 104 cd/m2 § 1×104 cd/m2 [edit] Luminous flux Luminous flux Name of unit Symbol Definition Relation to SI units lumen (SI unit) lm Ł cd·sr = 1 lm = 1 cd·sr [edit] Illuminance Illuminance Name of unit Symbol Definition Relation to SI units footcandle.0031 cd/m2 candela per square metre (SI unit).550.7×1010 Bq = 3. and Bq is only used for stochastic processes associated with radioactivity.763910417 cd/m2 candela per square inch cd/in2 Ł cd/in2 § 1.981 cd [edit] Luminance Luminance Name of unit Symbol Definition Relation to SI units 2 2 candela per square foot cd/ft Ł cd/ft § 10. [edit] Radiation .58×10 C/kg = 2.absorbed dose Name of unit Symbol Definition Relation to SI units 2 2 [35] gray (SI unit) Gy Ł 1 J/kg = 1 m /s = 1 Gy [29] rad rad Ł 0.exposure Radiation .equivalent dose Radiation .01 Gy = 0.exposure Name of unit Symbol Definition Relation to SI units í4 [29] roentgen R 1 R Ł 2.01 Sv sievert (SI unit) Sv Ł 1 J/kg[33] = 1 Sv .58×10 í4 C/kg The roentgen is not a SI unit and the NIST strongly discourages its continued use.01 Gy [edit] Radiation .01 Sv = 0.[34] [edit] Radiation .absorbed dose Radiation .equivalent dose Name of unit Symbol Definition Relation to SI units Röntgen equivalent man rem Ł 0.