Metric - US Customary and Imperial Conversion Charts

Length :: Area :: Volume/Capacity :: Mass (weight) :: Temperature

When you need to convert between Metric and US Customary or Imperial units, the tables below can help.

Or you can use the Unit Converter

Example 1: Convert 500 millimeters to inches

500 mm × 0.03937 is about 19.7 inches

Example 2: Convert 500 millimeters to feet

500 mm x 0.03937 is about 19.7 inches. Since there are 12 inches in a foot:

19.7 inches12 inches/foot is about 1.64 feet (or 1 foot and 7.7 inches)

Note: Values in italics are approximate. Bold values are exact.

Length

Metric   US or Imperial
1 millimeter [mm]   is about 0.03937 in
1 centimeter [cm] 10 mm is about 0.3937 in
1 meter [m] 100 cm is about 1.0936 yd
1 kilometer [km] 1000 m is about 0.6214 mile
US or Imperial   Metric
1 inch [in]   is exactly 2.54 cm
1 foot [ft] 12 in is exactly 0.3048 m
1 yard [yd] 3 ft is exactly 0.9144 m
1 mile 1760 yd is about 1.6093 km
1 int nautical mile 2025.4 yd is exactly 1.852 km

Area

Metric   US or Imperial
1 sq cm [cm2] 100 mm2 is about 0.1550 in2
1 sq m [m2] 10,000 cm2 is about 1.1960 yd2
1 hectare [ha] 10,000 m2 is about 2.4711 acres
1 sq km [km2] 100 ha is about 0.3861 mile2
US or Imperial   Metric
1 sq inch [in2]   is exactly 6.4516 cm2
1 sq foot [ft2] 144 in2 is exactly 0.09290304 m2
is about 0.0929 m2
1 sq yd [yd2] 9 ft2 is exactly 0.83612736 m2
is about 0.8361 m2
1 acre 4840 yd2 is about 4046.9 m2
1 sq mile [mile2] 640 acres is about 2.59 km2

Volume/Capacity

Metric   US Customary Imperial
1 cu cm [cm3]   is about 0.0610 in3
1 cu decimeter [dm3] 1,000 cm3 is about 0.0353 ft3
1 cu meter [m3] 1,000 dm3 is about 1.3080 yd3
1 liter [l] 1 dm3 is about 2.113 fluid pt 1.7598 pt
US Customary Imperial   Metric
1 cu inch [in3] is about 16.387 cm3
1 cu foot [ft3] is about 0.02832 m3
1 fluid ounce 1.0408 UK fl oz is about 29.574 mL
1 pint (16 fl oz) 0.8327 UK pt is about 0.4732 liters
1 gallon (231 in3) 0.8327 UK gal is about 3.7854 liters

Mass

Metric   US or Imperial
1 milligram [mg]   is about 0.0154 grain
1 gram [g] 1,000 mg is about 0.0353 oz
1 kilogram [kg] 1,000 g is about 2.2046 lb
1 tonne [t] 1,000 kg is about 1.1023 short ton
1 tonne [t] 1,000 kg is about 0.9842 long ton
US or Imperial   Metric
1 ounce [oz] 437.5 grain is exactly 28.349523125 g
is about 28.35 g
1 pound [lb] 16 oz is exactly 0.45359237 kg
is about 0.4536 kg
1 stone 14 lb is about 6.3503 kg
1 hundredweight [cwt] 112 lb is about 50.802 kg
1 short ton (US)   is about 0.9072 t
1 long ton (UK)   is about 1.0160 t