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A quad is a unit of energy equal to 10^15 (a short-scale quadrillion) BTU, or 1.055 x 10^18 joules (1.055 exajoules or EJ) in SI units. The unit is used by the U.S. Department o ..more definition+
In relation to the base unit of [energy] => (joules), 1 Foot Pound Force (ft lbf) is equal to 1.3558179483314 joules, while 1 Quads (quad) = 1.05505585262E+18 joules.| 640900 Foot Pound Force | to common energy units |
|---|---|
| 640900 ft lbf | = 868943.72308559 joules (J) |
| 640900 ft lbf | = 868.94372308559 kilojoules (kJ) |
| 640900 ft lbf | = 207682.53419828 calories (cal) |
| 640900 ft lbf | = 207.68253419828 kilocalories (kcal) |
| 640900 ft lbf | = 5.4235087386286E+24 electron volt (eV) |
| 640900 ft lbf | = 241.37325641267 watt hour (Wh) |
| 640900 ft lbf | = 1.9931072170421E+23 atomic unit of energy (au) |
| 640900 ft lbf | = 0.00020768253419828 tons of TNT (tTNT) |
| 640900 ft lbf | = 640900 foot pound force (ft lbf) |
| 640900 ft lbf | = 8689437230855.9 ergs (ergs) |