Conversion Factors

Length
To convert from the unit in the left column to the unit along the top row, multiply by the number in the cell where the two desired units meet. For example, to convert 10 kilometers to miles, multiply 10 by 0.6214 to get 6.214 mi.
× by cm in ft yd m km mi
cm --- 0.3937 0.03281 0.01094 0.01 0.00001 6.214×10-6
in 2.54 --- 0.0833 0.0278 0.0254 0.0000254 4.009×10-5
ft 30.48 12 --- 0.3333 0.3048 0.0003048 0.0001894
yd 91.44 36 3 --- 0.9144 0.0009144 0.0005682
m 100 39.370 3.2808 1.0936 --- 0.001 0.0006214
km 100000 39370 3280.8 1093.6 1000 --- 0.6214
mi 160934.4 63360 5280 1760 1609.344 1.609344 ---
Volume
To convert from the unit in the left column to the unit along the top row, multiply by the number in the cell where the two desired units meet. For example, to convert 10 gallons to liters, multiply 10 by 3.785 to get 37.85 L.
× by cm3/mL fl. oz cups pints quarts dm3/L gal
cm3/mL --- 0.03381 0.0042268 0.0021134 0.0010567 0.001 0.0002642
fl. oz 29.577 --- 0.125 0.0625 0.03125 0.029573 0.0078125
cups 236.59 8 --- 0.5 0.25 0.23659 0.0625
pints 472.72 16 2 --- 0.5 0.47318 0.125
quarts 946.34 32 4 2 --- 0.94635 0.25
dm3/L 1000 33.814 4.2429 2.1134 1.0567 --- 0.26417
gal 3785.0 128 16 8 4 3.7850 ---
Energy
To convert from the unit in the left column to the unit along the top row, multiply by the number in the cell where the two desired units meet. For example, to convert 10 calories to joules, multiply 10 by 4.184 to get 41.84 J.
× by eV J cal
eV --- 1.602×10-19 3.829×10-20
J 6.242×1018 --- 0.2390
cal 2.612×1019 4.184 ---
Temperature
To convert from the unit in the left column to the unit along the top row, follow the operation(s) in the cell where the two desired units meet. For example, to convert 100°C to °F, multiply 100 by 1.8 and then add 32 to get 212°F.
K °C °F
K --- K - 273.15 1.8K - 459.67
°C C + 273.15 --- 1.8C + 32
°F (F + 459.67)/1.8 (F - 32)/1.8 ---
Pressure
To convert from the unit in the left column to the unit along the top row, multiply by the number in the cell where the two desired units meet. For example, to convert 10 atm to torr, multiply 10 by 760 to get 7600 torr.
× by atm psi in Hg kPa torr mm Hg mbar
atm --- 14.696 29.925 101.325 760 760 1013.25
psi 0.06805 --- 2.0363 6.8947 51.715 51.715 68.947
in Hg 0.03342 0.4911 --- 3.3860 25.397 25.397 33.860
kPa 0.009869 0.14504 0.29534 --- 7.5006 7.5006 10
torr 0.001316 0.01934 0.039375 0.13332 --- 1 1.3332
mm Hg 0.001316 0.01934 0.039375 0.13332 1 --- 1.3332
mbar 0.0009869 0.01450 0.02953 0.1 0.75006 0.75006 ---

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