|
SI* (Modern Metric) Conversion Factors |
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|---|---|---|---|---|
|
Symbol |
When You Know |
Multiply By |
To Find |
Symbol |
|
LENGTH |
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|
in |
inches |
25.4 |
millimeters |
mm |
|
ft |
feet |
0.305 |
meters |
m |
|
yd |
yards |
0.914 |
meters |
m |
|
mi |
miles |
1.61 |
kilometers |
km |
|
mm |
millimeters |
0.039 |
inches |
in |
|
m |
meters |
3.28 |
feet |
ft |
|
m |
meters |
1.09 |
yards |
yd |
|
km |
kilometers |
0.621 |
miles |
mi |
|
AREA |
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| in2 | square inches | 645.2 | square millimeters | mm2 |
| ft2 | square feet | 0.093 | square meters | m2 |
| yd2 | square yards | 0.836 | square meters | m2 |
| ac | acres | 0.405 | hectares | ha |
| mi2 | square miles | 2.59 | square kimlometers | km2 |
| mm2 | square millimeters | 0.0016 | square inches | in2 |
| m2 | square meters | 10.764 | square feet | ft2 |
| m2 | square meters | 1.195 | square yards | yd2 |
| ha | hectares | 2.47 | acres | ac |
| km2 | square kilometers | 0.386 | square miles | mi2 |
|
VOLUME |
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| fl oz | fluid ounces | 29.57 | milliliters | mL |
| gal | gallons | 3.785 | liters | L |
| ft3 | cubic feet | 0.028 | cubic meters | m3 |
| yd3 | cubic yards | 0.765 | cubic meters | m3 |
| mL | milliliters | 0.034 | fluid ounces | fl oz |
| L | liters | 0.264 | gallons | gal |
| m3 | cubic meters | 35.71 | cubic feet | ft3 |
| m3 | cubic meters | 1.307 | cubic yards | yd3 |
|
MASS |
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| oz | ounces | 28.35 | grams | g |
| lb | pounds | 0.454 | kilograms | kg |
| T | short tons (2000 lb) | 0.907 | megagrams (or "metric ton") | Mg (or "t") |
| g | grams | 0.035 | ounces | oz |
| kg | kilograms | 2.202 | pounds | lb |
| Mg (or "t") |
megagrams (or "metric ton") | 1.103 | short tons (2000 lb) | T |
|
TEMPERATURE (exact) |
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| °F | Fahrenheit temperature | 5(F-32)/9 or (F-32)/1.8 |
Celcius temperature | °C |
| °C | Celcius temperature | 1.8C + 32 | Fahrenheit temperature | °F |
|
ILLUMINATION |
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| fc | foot-candles | 10.76 | lux | lx |
| fl | foot-Lamberts | 3.426 | candela/m2 | cd/m2 |
| lx | lux | 0.0929 | foot-candles | fc |
| cd/m2 | candela/m2 | 0.2919 | foot-Lamberts | fl |
|
FORCE and PRESSURE or STRESS |
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| lbf | poundforce | 4.45 | newtons | N |
| lbf/in2 | poundforce per square inch | 6.89 | kilopascals | kPa |
| N | newtons | 0.225 | poundforce | lbf |
| kPa | kilopascals | 0.145 | poundforce per square inch | lbf/in2 |
|
*SI is the symbol for the International System of Units. Appropriate rounding should be made to comply with Section 4 of ASTM E380. |
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