The three basic metric units are the meter (length), the gram (weight), and the liter (volume). The key to metric prefixes are:
- 1000 = kilo
- 100 = hecto
- 10 = deca
- 0.1 = deci
- 0.01 = centi
- 0.001 milli
The three basic metric units are the meter (length), the gram (weight), and the liter (volume). The key to metric prefixes are:
| 1 kilometer | = | 0.62137 mi |
| 1 meter | = | 3.2808 ft |
| 1 centimeter | = | 0.3937 in |
| 1 mile | = | 1.6093 km |
| 1 foot | = | 0.3048 m |
| 1 inch | = | 2.54 cm |
| 1 kilogram | = | 2.2046 lbs |
| 1 gram | = | 0.0353 oz |
| 1 short ton | = | 907.1847 kilos |
| 1 pound | = | 0.4536 kilos |
| 1 ounce | = | 28.3495 g |
| 1 hectoliter | = | 100 l | = | 0.1 m³ | = | 26.4172 gal |
| 1 liter | = | 100 cl | = | 1 dm³ | = | 1.0567 qt |
| 1 gallon (U.S.) | = | 3.7853 l | ||||
| 1 cubic inch | = | 16.3871 cm³ | ||||
| 1 square kilometer | = | 1 million m² | = | 0.3861 mi² |
| 1 hectare | = | 10,000 m² | = | 2.471 acres |
| 1 square meter | = | 10.7639 ft² | = | 1550.003 in² |
| 1 square mile | = | 640 acres | = | 258.9988 ha² |
| 1 square foot | = | 144 in² | = | 929.0304 cm² |
| Symbol | If You Know | Multiply By | To Find | Symbol | |
|---|---|---|---|---|---|
| Length | mm | millimeters | 0.03937 | inches | in |
| cm | centimeters | 0.3937 | inches | in | |
| m | meters | 3.3 | feet | ft | |
| m | meters | 1.1 | yards | yd | |
| km | kilometers | 0.62 | miles | mi | |
| in | inches | 2.54 | centimeters | cm | |
| ft | feet | 30.48 | centimeters | cm | |
| yd | yards | 0.9144 | meters | m | |
| Area | cm² | square centimeters | 0.16 | square inches | in² |
| m² | square meters | 1.2 | square yards | yd² | |
| km² | square kilometers | 0.4 | square miles | mi² | |
| ha² | hectares (10,000 m2) | 2.5 | acres | ||
| in² | square inches | 6.5 | square centimeters | cm² | |
| ft² | square feet | 0.09 | square meters | m² | |
| yd² | square yards | 0.8 | square meters | m² | |
| mi² | square miles | 2.6 | square kilomters | km² | |
| Weight | g | grams | 0.035 | ounce | oz |
| kg | kilograms | 2.2046 | pounds | lb | |
| t |
tonnes
(1,000 kq) |
1.1 | short tons | ||
| oz | ounces | 28.3495 | grams | g | |
| lb | pounds | 0.45 | kilograms | kg | |
| Volume | ml | milliliters | 0.03 | fluid ounces | fl oz |
| l | liters | 2.1 | pints | pt | |
| l | liters | 1.06 | quarts | qt | |
| l | liters | 0.26 | gallons | gal | |
| m³ | cubic meters | 35.314 | cubic feet | ft³ | |
| m³ | cubic meters | 1.3 | cubic yards | yd³ | |
| tsp | teaspoons | 5 | milliliters | ml | |
| tbsp | tablespoons | 15 | milliliters | ml | |
| fl oz | fluid ounces | 30 | milliliters | ml | |
| c | cups | 0.24 | liters | l | |
| pt | pints | 0.47 | liters | l | |
| qt | quarts | 0.97 | liters | l | |
| gal | gallons | 3.8 | liters | l | |
| ft³ | cubic feet | 0.03 | cubic meters | m³ | |
| yd³ | cubic yards | 0.76 | cubic meters | m³ |