Abbreviations
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Below are some commonly encountered abbreviations for units of measurement:
LENGTH


Metric units

English or Imperial units

km = kilometers

mi = miles

m = meters

ft = feet

cm = centimeters

in = inches

mm = millimeters


m m = micrometers


nm = nanometers


Å = Ångstroms


AU = astronomical units


AREA


Metric units

English or Imperial units

ha = hectares

ac = acres

VOLUME


Metric units

English or Imperial units

L = liters

gal = gallons

mL  milliliters


cm^{3} = cubic centimeters

ft^{3} = cubic feet

MASS


Metric units

English or Imperial units

kg = kilograms

lb = pounds

g = grams

oz = ounces

mg = milligrams


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