Metric Units for everyday use.
Metric
Conversion Factors (Approximate)
Quantity
Unit
Imperial to Metric
Metric to Imperial
And Symbol
Units
Units
Length
Millimetre (mm)
1 in = 25.4 mm
1 mm = 0.0394 in
Centimetre (cm, 1Omm)
1 in = 2.54 cm
1 cm = 0.394 in
1 ft = 30.5 cm
Metre (m, 100cm)
1 yd = 0.914 m
1 m = 3.28 ft
Kilometre (km, 1000m)
1 mile = 1.61 km
1 km = 0.62 mile
Mass (Commonly used "Weight")
Gram (g)
1 oz = 28.3 g
1 g = 0.0353 0Z
Kilogram (kg, 1000)
1 lb = 454 g
1 kg = 2.2 lb
1 stone = 6.35 kg
1 kg = 0.157 stone
Tonne (t, 1000kg)
1 ton = 1.02 t
1 t = 0.98 ton
Area
Square centimetre (cm2)
1 in2 = 6.45 cm2
1 cm2 = 0.155 in2
Square metre
1 ft2 = 929 cm2
1 m2 = 10.8 ft2
(m2, 10.000 cm2)
1 yd2 = 0.836 m2
1 m2 = 1.2 yd2
1 perch = 25.3 m2
1 he = 9.88 roods
1 acre = 0.405 ha
1 he = 2.47 acres
Hectare (he, 10 000 m2)
1 mile2 = 2,59 km2
1 km2 = 0.386 mile2
Square kilometre (km2
1 000 000 m2, 100 ha)
Volume
Cubic centimetre (cm3.)
1 in3 = 16 4 cm3
1 cm3 = 0.061 in3
Cubic metre
1 ft3 = 28 300 cm3
1 m3 = 35.3 ft3
(m3, 1 000 000 cm2")
1 yd3 = 0.765 m3
1 m3 = 1.31 yd3
1 bushel=0.0364 m3
1 m3 = 27.5 bushels
Conversion Factors (Approximate)
Quantity
Metric unit
Imperial to Metric
Metric to Imperial
and symbol
Units
Units
Volume
Millilitre (ml)
1 fl oz = 28.4 ml
1 ml = 0.0352 fl oz
(liquids
Litre (l, 1000 ml)
1 pint = 568 ml
1 litre = 1.76 pints
and gases)
Kilolitre (kl, 1000 l, 1m3)
1 gal = 4.55 litres
1 kl = 220 gal
Speed
Kilometre per hour (km/h)
1 mph = 1.61 km/h
1 km/h =0.1621mph
Pressure
Kilopascal (kPa)
1 psi = 6.89 kPa
1 kPa = 0.145 psi
Energy
Kilojoules (kJ)
1 Btu = 1 06 kJ
1 kJ = 0.048 Btu
1 kilocalorie=4.19 kJ
1 kJ = 0.239 kilocalorie
Mega joule (MJ, 1000 kJ)
1 therm = 106 MJ
1 MJ = 0.009 48 therm
Kilowatt hour
1 therm = 29.3 kWh
1 kWh = 0.034 therm
(kWh, 3.6 MJ)
1 ''gas unit"(1 kWh)
1 W = W278 kWh
= 36 MJ
= 0.278 “gas unit”
Power
Kilowatt (kW)
1 hp = 0.746 kW
1 kW = 1.34 hp
Chart by courtesy of the Metric
Conversion Board