Basic Conversion Factors.
Selecting the ideal components for your application will often involve calculating certain values. The table below contains a selection of useful conversion factors.
| Measurement Type | Conversion Factors | Reverse Conversion Factors |
|---|---|---|
| Length | 1mm = 0.03937in | 1in = 25.4mm |
| Area | 1mm² = 0.00155in² |
1in2 = 645.16mm² |
| Volume |
1mm³ = 61.02 x 10-6 1 litre = 1 x 106mm³ |
1in3 = 16387mm³ 1ml = 1cm³ |
| 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 |
 1kgm² = 54674.75ozins² 1gcm² = 5.467 x 10-3ozin² 1kgm² = 23.73lbft² |
1ozins² = 18.29 x 10-6kgm² 1ozin² = 182.9gcm² 1lb.ft² = 0.0421kgm² |
| Pressure and Stress |
1N/m² = 145 x 10-6lbf/in² 1N/m² = 64.75 x 10-6tonf/in² |
1lbf/in² = 6.895 x 10³N/m² 1tonf/in² = 15.44 x 106N/m² |
| Temperature |
°C = (°F-32)*5/9 K = °C+273.15 |
°F = (°C*9/5)+32 °R = °F+459.67 |
| Angles |
1rad = 57.3 degrees 1mrad = 3.438 arcmins |
1 degree = 0.0175 rad 1 arcmin = 0.291 mrads |