Conversion factors

Distance 1 kilometer (km) = 0.62139 miles (mi) 1 mi = 1.6093 km
1 meter (m) = 1.0936 yards (yd) 1 yd = 0.9144 m
1 m = 3.2808 feet (ft) 1 ft = 0.3048 m
1 millimeter (mm) = 0.03937 inches (in) 1 in = 25.4 mm
Area 1 km2 = 0.3861 mi2 1 mi2 = 2.5899 km2
1 hectare (ha) = 2.471 acres (acs) 1 ac = 0.4047 ha
1 m2 = 1.196 yd2 1 yd2 = 0.836 m2
1 m2 = 10.764 ft2 1 ft2 = 0.0929 m2
1 mm2 = 0.00155 in2 1 in2 = 645.2 square mm2                   
Volume 1 m3 = 1.308 yd3 1 yd3 = 0.7646 m3
1 m3 = 35.315 ft3 1 ft3 = 0.02832 m3
1 mm3 = 0.00006102 in3 1 in3 = 16387.064 mm3
1 liter (l) = 0.0353 ft3 1 ft3 = 28.137 l
1 l = 0.2642 US gallons 1 US gallon = 3.785 l
1 l = 0.22 UK gallons 1 UK gallon = 4.5454 l
Weight 1 tonne = 0.9842 tons (long) 1 long ton = 1.016 tonnes
1 tonne = 1.1024 tons (short) 1 short ton = 0.9071 tonnes
1 kilogram (kg) = 2.2046 pounds (avoirdupois) 1 pound = 0.4536 kg
1 gram (g) = 15.432 grains 1 grain = 0.0648 g
1 grain (avoidupois) = 1 grain (troy) = 1 grain (apothecaries)
Temperature Celsius to Fahrenheit = (9/5 x temp C) +32
Celsius to Kelvin = temp C +273.15
Fahrenheit to Celsius = (5/9) x (temp F - 32)
Fahrenheit to Kelvin = (5/9) x (temp F + 459.67)
Kelvin to Celsius = temp K - 273.15