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.
| 1 kilometer | =0.62137 mile |
| 1 meter | =3.2808 feet |
| 1 centimeter | =0.3937 inch |
| 1 mile | =1.6093 kilometers |
| 1 foot | =0.3048 meter |
| 1 inch | =2.54 centimeters |
| 1 kilogram | =2.2046 lbs. |
| 1 gram | =0.0353 ounce |
| 1 short ton | =907.1847 kilos |
| 1 pound | =0.4536 kilo |
| 1 ounce | =28.3495 grams |
| 1 hectoliter | = 100 liters | = 0.1 cu. meter | = 26.4172 gallons |
| 1 liter | = 100 centiliters | = 1 cu. decimeter | = 1.0567 quarts |
| 1 gallon (U.S.) | = 3.7853 liters | ||
| 1 cu. inch | = 16.3871 cu. cm |
| 1 sq. kilometer | = 1 million sq. meters | = 0.3861 sq. mile |
| 1 hectare | = 10,000 sq. meters | = 2.471 acres |
| 1 sq. meter | = 10.7639 sq. feet | = 1550.003 sq. inches |
| 1 sq. mile | = 640 acres | = 258.9988 hectares |
| 1 sq. foot | = 144 sq. inches | = 929.0304 sq. centimeters |
| Symbol | If You Know | Multiply By | To Find | Symbol | |
|---|---|---|---|---|---|
| Length | mm cm m m km in ft yd mi |
millimeters centimeters meters meters kilometers inches feet yards miles |
0.03937 0.3937 3.3 1.1 0.6 2.54 30.48 0.9 1.6 |
inches inches feet yards miles centimeters centimeters meters kilometers |
in in ft yd mi cm cm m km |
| Area | cm² m² km² ha² in² ft² yd² mi² |
sq. centimeters sq. meters sq. kilometers hectares (10000 m²) sq. inches sq. feet sq. yards sq. miles |
0.16 1.2 0.4 2.5 6.5 0.09 0.8 2.6 |
sq. inches sq. yards sq. miles acres sq. centimeters sq. meters sq. meters sq. kilometers |
in² yd² mi² cm² m² m² km² |
| Weight | g kg t oz lb |
grams kilograms tonnes (1000 kg) ounces pounds |
0.035 2.2046 1.1 28.3495 0.45 |
ounce pounds short tons grams kilograms |
oz lb g kg |
| Volume | ml l l l m³ m³ tsp tbsp fl oz c pt qt gal ft³ yd³ |
milliliters liters liters liters cu. meters cu. meters teaspoons tablespoons fluid ounces cups pints quarts gallons cu. feet cu. yards |
0.03 2.1 1.06 0.26 35.314 1.3 5 15 30 0.24 0.47 0.95 3.8 0.03 0.76 |
fluid ounces pints quarts gallons cu. feet cu. yards millimeters millimeters millimeters liters liters liters liters cu. meters cu. meters |
fl oz pt qt gal ft³ yd³ ml ml ml l l l l m³ m³ |
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