Arithmetic/Geometry » Imperial and US units
Check converting units to learn about converting metric units.
Temperature
In the US and a few other countries temperature is measured in degrees Fahrenheit.
In science the Kelvin scale is used for measuring temperature.
With the following formulas you can convert between the different units.
F = 1.8C + 32
F = 1.8K – 459.67
C = 59(F – 32)
C = K – 273.15
K = 59(F + 459.67)
K = C + 273.15
Length
| 1 inch (in) | = | 112 feet | = | 2.54 cm |
| 1 foot (ft) | = | = | 30.48 cm | |
| 1 yard (yd) | = | 3 feet | = | 91.44 cm |
| 1 mile (mi) | = | 5280 feet | = | 160 934.4 cm = 1.609 344 km |
Area
1 acre = 4046.856 422 400 m2
Volume (International/Imperial)
1 fluid ounce (fl oz) = 28.413 062 5 ml
| 1 pint (pt) | = | 20 fluid ounces | = | 568.261 25 ml |
| 1 quart (qt) | = | 40 fluid ounces | = | 1136.522 5 ml |
| 1 gallon (gal) | = | 160 fluid ounces | = | 4546.09 ml |
Volume (US wet/US liquid)
1 US fluid ounce (fl oz) = 29.573 529 562 5 ml
| 1 US pint (pt) | = | 16 US fluid ounces | = | 473.176 473 ml |
| 1 US quart (qt) | = | 32 US fluid ounces | = | 946.352 946 ml |
| 1 US gallon (gal) | = | 128 US fluid ounces | = | 3785.411 784 ml |
| 1 barrel (bbl) | = | 31.5 US gallons | = | 119 240.471 196 ml |
| 1 oil barrel (bbl) | = | 42 US gallons | = | 158 987.294 928 ml |
Weight (Avoirdupois)
| 1 ounce (oz) | = | 116 pounds | = | 28.349 523 125 grams |
| 1 pound (lb) | = | = | 453.592 37 grams | |
| 1 stone (st) | = | 14 pounds | = | 6350.293 18 grams |
| 1 (long) ton (t) | = | 2240 pounds | = | 1 016 046.908 8 grams |
| 1 (short) ton (t) | = | 2000 pounds | = | 907 184.74 grams (used in US and Canada) |
Weight (Troy)
1 pennyweight (dwt) = 1.555 173 84 grams
| 1 troy ounce (oz t) | = | 20 pennyweights | = | 31.103 476 8 grams |
| 1 troy pound (lb t) | = | 240 pennyweights | = | 373.241 721 6 grams |
Other units
1 carat (CD) = 0.2 grams
1 (metric) ton (t) = 1000 kilograms
Speed of light, light year and astronomical unit? Check astronomical measurements.