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Conversation factor
    Length     Multiply by
    Inches to Centimetres     2.54
    Centimetres to Inches     0.39
    Inches to Millimetres     25.4
    Millimetres to Inches     0.04
    Feet to Metres     0.31
    Metres to Feet     3.28
    Yards to Metres     0.91
    Metres to Yards     1.09
    Miles to Kilometres     1.61
    Kilometres to Miles     0.62
    Area     Multiply by
    Square Inches to Square Centimetres     6.451
    Square Centimetres to Square Inches     0.15
    Square Feet to Square Metres     0.09
    Square Metres to Square Feet     10.76
    Square Yards to Square Metres     0.84
    Square Metres to Square Yards     1.2
    Square Miles to Square Kilometres     2.59
    Square Kilometres to Square Miles     0.39
    Acres to Hectares     0.4
    Hectares to Acres     2.47
    Volume     Multiply by
    Cubic Inches to Cubic Centimetres     16.39
    Cubic Centimetres to Cubic Inches     0.06
    Cubic Feet to Cubic Metres     0.03
    Cubic Metres to Cubic Feet     35.32
    Cubic Yards to Cubic Metres     0.76
    Cubic Metres to Cubic Yards     1.31
    Cubic Inches to Litres     0.02
    Litres to Cubic Inches     61.03
    Gallons to Litres     4.55
    Litres to Gallons     0.22
    US Gallons to Litres     3.79
    Litres to US Gallons    0.26
    Fluid Ounces to Cubic Millilitres    30.77
    Cubic Millilitres to Fluid Ounces    0.03
    Weight     Multiply by
    Ounces to Grams    28.35
    Grams to Ounces    0.04
    Pounds to Kilograms    0.45
    Kilograms to Pounds    2.21
    Long Tons to Tonnes    1.02
    Tonnes to Long Tons    0.98