Units of Measurement

Length
U.S. UnitEquivalentMetric UnitEquivalent
1 foot (ft)12 inches (in)1 centimeter (cm)10 millimeters (mm)
1 yard (yd)3 feet (ft)1 meter (m)100 centimeters (cm)
1 rod (rd)5.5 yards (yd)1 kilometer (km)1,000 meters (m)
1 mile (mi)1,760 yards (yd)
Mass
U.S. UnitEquivalentMetric UnitEquivalent
1 dram (dr)27.344 grains (gr)1 kilogram (kg)1,000 grams (g)
1 ounce (oz)16 drams1 tonne (t)1,000 kilograms
1 pound (lb)16 ounces
1 hundredweight (cwt) Long112 pounds
1 hundredweight (cwt) Short100 pounds
1 ton (long)2,240 pounds
1 ton (short)2,000 pounds
Area
U.S. UnitEquivalentMetric UnitEquivalent
1 square foot (ft2)144 square inches (in2)1 square centimeter (cm2)100 square millimeters (mm2)
1 square yard (yd2)9 square feet1 square meter (m2)10,000 square centimeters (cm2)
1 acre4,840 square yards (yd2)1 hectare10,000 square meters
1 square mile640 acres1 square kilometer1,000,000 square meters (m2)
Volume
U.S. UnitEquivalentMetric UnitEquivalent
1 cubic foot1,728 cubic inches1 cubic centimeter (cc)1 milliliter (ml)
1 cubic yard27 cubic feet1 liter (l)1,000 milliliters
1 cubic meter (m3)1,000 liters
Capacity (liquid and dry measures)
U.S. UnitEquivalentMetric UnitEquivalent
1 fluidram (fl dr)60 minims (min)1 centiliter (cl)10 milliliters (ml)
1 fluid ounce (fl oz)8 fluidrams1 deciliter (dl)10 centiliters
1 gill (gi)4 fluid ounces1 liter (1)10 deciliters
1 pint (pt)4 gills1 decaliter (dal)10 liters
1 quart (qt)2 pints1 hectoliter (hi)10 decaliters
1 gallon (gal)4 quarts1 kiloliter (hi)10 hectoliters
1 peck (pk)2 gallons
1 bushel (bu)4 pecks


Related Links:
Measurement
Math
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