Commonly Used Units
| Symbol | Physical Quantity | Name | Definition | SI |
|---|
| lb | mass | Pound | | 0.45359237 kg |
| kgf | force | Kilogram-Force | 9.80665 N |
| torr | pressure | Torr | | 0.133322 N /m²
|
| atm | pressure | Atmosphere | 760 torr |
| amu | mass | Atomic Mass Unit | | 1.6605655e-27 kg |
| D | electric dipole moment | Debye | | 3.33564e-30 A m s |
| eV | energy | Electron Volt | | 1.60219e-19 J |
| BTU | energy | British Thermal Unit | | 1055.056 J |
| kWh | energy | Kilowatt-Hour | | 3.6e6 J |
| cal&subt&subh | energy | Thermochemical Calorie | | 4.184 J |
| °C | temperature | Centigrade | | =K + 273 |
| °F | temperature | Fahrenheit | 9/5*(°C+32) |
| in | length (UK) | Inch | | 2.54e-2 m
|
| ft | length (UK) | foot | 12 in | 0.3048 m
|
| yd | length (UK) | yard | 3 ft | 0.9144 m
|
| rod | length (UK) | rod | 5.5 yd | 5.0292 m
|
| furlong | length (UK) | furlong | 220 yd
|
| mi | length (UK) | mile | 1760 yd | 1609.3 m
|
| acre | area (UK) | acre | 160 rod² | 0.404687 H
|
| section | area (UK) | section | mile²
|
| load | volume-sand | load | yd³
|
| cd | volume-wood | cord | 128 ft³ | 3.624 m³
|
| perch | volume-stone | perch | 24.75 ft³
|
| drop | capacity-liquid (APO) | drop | | 61.6e-6 l
|
| minim | capacity-liquid (APO) | minim | | 61.6e-6 l
|
| fl drachm | capacity-liquid (APO) | fluid drachm | 60 drops | 3.69e-3 l
|
| fl ounce | capacity-liquid (APO) | fluid ounce | 8 drachms | 29.57e-3 l
|
| gi | capacity-liquid (UK) | gill | | 0.118292 l
|
| pt | capacity-liquid (UK) | liquid pint | 4 gi = 16 fl ounces | 0.4732 l
|
| qt | capacity-liquid (UK) | liquid quart | 2 pi | 0.9463 l
|
| gal | capacity-liquid (UK) | gallon | 8 pi | 3.7853 l
|
| bbl | capacity-liquid (UK) | barrel | 31.5 gal
|
| hhd | capacity-liquid (UK) | hogshead | 2 bbl
|
| pt | capacity-dry (UK) | dry pint |
|
| qt | capacity-dry (UK) | dry quart | 2 pts | 1.1012 l
|
| peck | capacity-dry (UK) | peck | 8 qts | 8.810 l
|
| bushel | capacity-dry (UK) | bushel | 4 pecks | 35.23 l
|
| grain | weight (APO/TROY) | grain | | .0648 g
|
| scruple | weight (APO) | scruple | 20 grains
|
| dram | weight (APO) | dram | 60 grains
|
| ounce | weight (APO) | ounce | 8 drams
|
| lb | weight (APO/TROY) | Pound | 12 ounces, 5760 grains | 373.2 g
|
| drachm | weight (AVOIR) | drachm |
|
| ounce | weight (AVOIR) | ounce | 16 drachm | 28.350 g
|
| lb | weight (AVOIR) | Pound | 16 ounces | 453.6 g
|
| ton | weight (AVOIR) | short ton | 2000 lbs | 0.9072 tonneau
|
| long ton | weight (AVOIR) | long ton | 2240 lbs | 1.016 tonneau
|
| grain | weight (AVOIR) | grain |
|
| hundredweight | weight (AVOIR) | hundredweight | 7000 grains, 112 lbs
|
| pennyweight | weight (TROY) | pennyweight | 24 grains
|
| ounce | weight (TROY) | ounce | 20 pennyweights | 31.103 g
|
| carat | weight (TROY) | carat | 3.2 grains
|
APO: Apothecaries' Weight
AVOIR: Avoirdupois Weight
TROY: Troy Weight
UK: United Kingdom (England)