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Basic Conversion Factors.

SelectingÂ the ideal components for your application will often involve calculating certain values. The table below contains a selection of useful conversion factors.

Measurement TypeConversion FactorsReverse Conversion Factors
Length 1mm = 0.03937in 1in = 25.4mm
Area 1mmÂ² = 0.00155inÂ²
1in2 = 645.16mmÂ²
Volume

1mmÂ³ = 61.02 x 10-6

1 litre = 1 x 106mmÂ³

1in3 = 16387mmÂ³

1ml = 1cmÂ³

Force and Mass

1N = 0.101972kgf

1kgf = 9.80665N

1kg = 2.2046lb

1lbf = 4.4482N

1N = 0.2248lbf

1lb = 0.4536kg

Torque

1Nm = 8.8507lbfin

1Nm = 141.612ozfin

1Nm = 10197.16gfcm

1lbfin = 0.1130Nm

1ozin = 0.00706Nm

Power

1kW = 1.360PS (metric PS)

1kW = 1.341hp

1hp = 0.7457kW
Moment of Inertia

Â 1kgmÂ² = 54674.75ozinsÂ²

1gcmÂ² = 5.467 x 10-3ozinÂ²

1kgmÂ² = 23.73lbftÂ²

1ozinsÂ² = 18.29 x 10-6kgmÂ²

1ozinÂ² = 182.9gcmÂ²

1lb.ftÂ² = 0.0421kgmÂ²

Pressure and Stress

1N/mÂ² = 145 x 10-6lbf/inÂ²

1N/mÂ² = 64.75 x 10-6tonf/inÂ²

1lbf/inÂ² = 6.895 x 10Â³N/mÂ²

1tonf/inÂ² = 15.44 x 106N/mÂ²

Temperature

Â°C = (Â°F-32)*5/9

K = Â°C+273.15

Â°F = (Â°C*9/5)+32

Â°R =Â Â°F+459.67

Angles