Conversion Table

Length

Metric Imperial
1 millimeter (mm) 0.0394 in.
1 centimeter (cm; = 10 mm) 0.3937 in.
1 meter (m; = 100 cm) 1.0936 yd
1 kilometer (km; = 1,000 m) 0.6214 mile

Imperial Metric
1 inch (in.) 2.54 cm
1 foot (ft; = 12 in.) 0.3048 m
1 yard (yd; = 3 ft) 0.9144 m
1 mile (= 1760 yd) 1.6093 km
1 int nautical mile (= 2025.4 yd) 1.852 km

Area

Metric Imperial
1 cm2 (= 100 mm2) 0.1550 in.2
1 m2 (= 10,000 cm2) 1.1960 yd2
1 hectare (ha; = 10,000 m2) 2.4711 acres
1 km2 (= 100 ha) 0.3861 mile2

Imperial Metric
1 in.2 6.4516 cm2
1 ft2 (= 144 in.2) 0.0929 m2
1 yd2 (= 9 ft2) 0.8361 m2
1 acre (= 4840 yd2 4046.9 m2
1 mile2 (= 640 acres) 2.59 km2

Mass/Weight

Metric Imperial
1 milligram (mg) 0.0154 grain
1 gram (g; = 1,000 mg) 0.0353 oz
1 kilogram (kg; = 1,000 g) 2.2046 lb
1 tonne (t; = 1,000 kg) 0.9842 ton (T)

Imperial Metric
1 ounce (oz; = 437.5 grain) 28.35 g
1 pound (lb; = 16 oz) 0.4536 kg
1 stone (= 14 lb) 6.3503 kg
1 hundredweight (cwt; = 112 lb) 50.802 kg
1 ton (= 20 cwt) 1.016 t

Temperature

°C = (5/9) × (°F - 32)

or

°F = (9/5) × °C + 32

 

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