Conversion Factors

Imperial to Metric
Inches to Millimetres multiply by 25.4
Inches to Centimetres multiply by 2.54
Feet to Centimetres multiply by 30.48
Feet to Metres multiply by 0.3048
Yards to Metres multiply by 0.9144
Miles to Metres multiply by 1,609.3
Miles to Kilometres multiply by 1.609
Nautical Miles to Metres multiply by 1,853.27
Sq. Inches to Sq. Millimetres multiply by 645.160
Sq. Inches to Sq. Centimetres multiply by 6.452
Sq. Feet to Sq. Metres multiply by 0.0929
Sq. Yards to Sq. Metres multiply by 0.835
Sq. Miles to Sq. Kilometres multiply by 2.590
Acres to Sq. Kilometres multiply by 0.004047
Acres to Hectares multiply by 0.4047
Cubic Inches to Cubic Centimetres multiply by 16.36
Cubic Feet to Cubic Metres multiply by 0.03
Cubic Yards to Cubic Metres multiply by 0.76
Cubic Inches to Litres multiply by 0.01639
Grains to Grammes multiply by 0.648
Ounces to Grammes multiply by 28.35
Pounds to Grammes multiply by 453.6
Pounds to Kilogrammes multiply by 0.4536
Cwt to Kilogrammes multiply by 1,016
Tons to Kilogrammes multiply by 1.016
Tons to Tonnes multiply by 1.016
Pints to Litres multiply by 0.5682
Imperial Gallons to Litres multiply by 4.546
Fahrenheit to Centigrade minus 32 degrees multiply by 0.5555

Metric to Imperial
Millimetres to Inches multiply by 0.03937
Centimetres to Inches multiply by 0.3937
Centimetres to Feet multiply by 0.0328
Metres to Feet multiply by 3.281
Metres to Yards multiply by 1.094
Metres to Miles multiply by 0.000621
Kilometres to Miles multiply by 0.6214
Metres to Nautical Miles multiply by 0.000539
Sq. Millimetres to Sq. Inches multiply by 0.001550
Sq. Centimetres to Sq. Inches multiply by 0.155
Sq. Metres to Sq. Feet multiply by 10.764
Sq. Metres to Sq. Yards multiply by 1.196
Sq. Kilometres to Sq. Miles multiply by 0.3861
Sq. Kilometres to Acres multiply by 247.1
Hectares to Acres multiply by 2.471
Cubic Centimetres to Cubic Inches multiply by 0.061
Cubic Metres to Cubic Feet multiply by 35.3
Cubic Metres to Cubic Yards multiply by 1.316
Litres to Cubic Inches multiply by 61.03
Grammes to Grains multiply by 15.43
Grammes to Ounces multiply by 0.03527
Grammes to Pounds multiply by 0.002205
Kilogrammes to Pounds multiply by 2.205
Kilogrammes to Cwt multiply by 0.01968
Kilogrammes to Tons multiply by 0.0009842
Tonnes to Tons multiply by 0.9842
Litres to Pints multiply by 1.76
Litres to Imperial Gallons multiply by 0.22
Centigrade to Fahrenheit multiply by 1.8 add 32 degrees