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Here are some useful conversion factors for American standards
(foot/pound/second) to SI (MKS, meter/kilogram/second).
Note that Racer uses all SI units.
| Name | S.I. Units | Equivalent units |
| Force | N (Newton) | m.kg/s^2 |
| Power | W (Watt) | N.m/s, J/s, m^2.kg/s^3 |
| Torque | N.m | |
| Speed | m/s | |
| Acceleration | m/s^2 | |
| Mass | kg | |
| Distance | m |
| To go from | To | Multiply by | Divide by |
| Moment of inertia lbs*ft^2 | kg*m^2 | 0.042140110090 | 23.73036 |
| ?Moment of inertia in-lbs^2 | kg*m^2 | 0.113 | 8.851 |
| ?Moment of inertia oz-inches^2 | kg*m^2 | 0.007062 | 141.60 |
| Distances - to go from | To | Multiply by | Divide by |
| Mile | km | 1.6093 | 0.621388 |
| Foot (ft) | m | 0.3048 | |
| inch (in) | m | 0.0254 | |
| Mile | foot | 5280 | 1.89393939 |
| Speed - to go from | To | Multiply by | Divide by |
| km/h | m/s | 0.2778 | |
| mph | km/h | 1.609 | |
| mph | m/s | 0.447 | |
| Rotational speeds - to go from | To | Multiply by | Divide by |
| 1 rpm (revolution per minute) | rad/s | 0.105 | |
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| Forces - to go from | To | Multiply by | Divide by |
| 1 G | m/s^2 | 9.8065 | |
| lb (poundforce) | N | 4.45 | |
| lb (poundforce) | kg | 0.4536 (assuming G=9.8) | |
| lb.ft (foot pounds) | Nm | 1.356 | |
| lb.ft/s (foot pound per second) | W | 1.356 | |
| hp (horsepower) | W | 745.7 (500 ft.lb/s) | |
| metric hp (horsepower) | hp | 0.986 | |
| metric hp (horsepower) | kW | 735.5 | |
| Force/distance - to go from | To | Multiply by | Divide by |
| lbf/in (poundforce per inch) | N/m | 175.12685 | 0.00571 |
Other links that might help:
(last updated November 13, 2012 )