The numerical value of the units in the When You Know column are multiplied by the approximate unit conversion factor found in the Multiply By column to obtain a numerical value for the units listed in the To Find Column. For example:
When You Know | Multiply By | To Find |
---|---|---|
20 m | 1.09 | approximately 21.8 yd |
Symbol | When You Know | Multiply By | To Find | Symbol |
---|---|---|---|---|
mm | millimeter | 0.04 | inch | in |
cm | centimeter | 0.39 | inch | in |
m | meter | 3.28 | foot | ft |
m | meter | 1.09 | yard | yd |
km | kilometer | 0.62 | mile | mi |
Symbol | When You Know | Multiply By | To Find | Symbol |
---|---|---|---|---|
cm² | square centimeters | 0.16 | square inch | in² |
m² | square meter | 1.20 | square yard | yd² |
km² | square kilometer | 0.39 | square mile | mi² |
ha | hectare (10,000 m2) |
2.47 | acre |
Symbol | When You Know | Multiply By | To Find | Symbol |
---|---|---|---|---|
g | gram | 0.04 | ounce | oz |
kg | kilogram | 2.20 | pound | lb |
metric ton (1,000 kg) |
1.10 | short ton |
Symbol | When You Know | Multiply By | To Find | Symbol |
---|---|---|---|---|
mL | milliliter | 0.03 | fluid ounce | fl oz |
mL | milliliter | 0.06 | cubic inch | in³ |
L | liter | 2.11 | pint, liquid | pt |
L | liter | 1.06 | quart, liquid | qt |
L | liter | 0.26 | gallon | gal |
m³ | cubic meter | 35.31 | cubic foot | ft³ |
m³ | cubic meter | 1.31 | cubic yard | yd³ |
Symbol | When You Know | Calculation | To Find | Symbol |
---|---|---|---|---|
°C | degree Celsius | multiply 1.8, then add 32 | degree Fahrenheit | °F |
K | Kelvin | subtract 273.15 | degree Celsius | °C |
U.S. Customary to Metric Conversions
Note: These approximate conversion factors are published as NIST SP 365, which is a laminated metric conversion card. Copies of this publication can be requested by contacting theSI [at] nist.gov (theSI[at]nist[dot]gov)