Convert Kilojoules to Foot-pounds
1 kilojoule is 737.562149 ft·lbf. One kilojoule is exactly 737.562149277 foot-pounds.
One kilojoule is 737.56215 foot-pounds. To convert kilojoules to foot-pounds, multiply by 737.56215; to go the other way, divide by 737.56215 or multiply by 0.0013558179. The factor is exact rather than rounded: it follows from NIST Special Publication 811. A thousand joules.
Factor checked against the defining standard · How we check
- Kilojoules × 737.56215
value * 737.562149277737.562 ft·lbf
1 kilojoule in every energy unit
| Unit | Value | Exact factor |
|---|---|---|
| joules | 1,000 J | × 1,000 |
| kilojoules (as entered) | 1 kJ | — |
| calories | 239.0057361 cal | × 239.005736138 |
| kilocalories | 0.2390057361 kcal | × 0.239005736138 |
| watt-hours | 0.2777777778 Wh | × 0.277777777778 |
| kilowatt-hours | 0.0002777777778 kWh | × 0.000277777777778 |
| British thermal units | 0.9478171203 BTU | × 0.947817120313 |
| foot-pounds | 737.5621493 ft·lbf | × 737.562149277 |
Factors are entered by hand from NIST Special Publication 811 rather than derived from a units library, so the ones that terminate are exact rather than rounded.
How do you convert kilojoules to foot-pounds?
- 1.Take the measurement in kilojoules.
- 2.Multiply by 737.56215 — that is how many foot-pounds fit in one kilojoule.
- 3.To go back the other way, divide by 737.56215, or multiply by 0.0013558179.
Worked example: 25 kilojoules to foot-pounds
- Formula
- kJ × 737.56215 = ft·lbf
- Arithmetic
- 25 × 737.56215 = 18,439.053732 ft·lbf
- Answer
- 25 kJ = 18,439.053732 ft·lbf
The factor is rounded for display; the figure above is computed from the full value.
Kilojoules to foot-pounds conversion table
| Kilojoules | Foot-pounds |
|---|---|
| 1 kJ | 737.562149 ft·lbf |
| 2 kJ | 1,475.124299 ft·lbf |
| 3 kJ | 2,212.686448 ft·lbf |
| 4 kJ | 2,950.248597 ft·lbf |
| 5 kJ | 3,687.810746 ft·lbf |
| 6 kJ | 4,425.372896 ft·lbf |
| 7 kJ | 5,162.935045 ft·lbf |
| 8 kJ | 5,900.497194 ft·lbf |
| 9 kJ | 6,638.059343 ft·lbf |
| 10 kJ | 7,375.621493 ft·lbf |
| 12 kJ | 8,850.745791 ft·lbf |
| 15 kJ | 11,063.432239 ft·lbf |
| 20 kJ | 14,751.242986 ft·lbf |
| 25 kJ | 18,439.053732 ft·lbf |
| 50 kJ | 36,878.107464 ft·lbf |
| 100 kJ | 73,756.214928 ft·lbf |
| 200 kJ | 147,512.429855 ft·lbf |
| 300 kJ | 221,268.644783 ft·lbf |
| 500 kJ | 368,781.074639 ft·lbf |
| 1000 kJ | 737,562.149277 ft·lbf |
| 2000 kJ | 1,475,124.298554 ft·lbf |
| 5000 kJ | 3,687,810.746385 ft·lbf |
| 10000 kJ | 7,375,621.49277 ft·lbf |
What is a kilojoule?
A thousand joules. Food energy outside the US is labelled here, alongside or instead of calories.
What is a foot-pound?
A pound-force acting through one foot. The same arithmetic as the torque unit of that name, and a different quantity: this one is work done, not twist applied.
How many foot-pounds are in a kilojoule?
One kilojoule is 737.56215 foot-pounds. Going the other way, one foot-pound is 0.0013558179 kilojoules. Both figures come from the same defined relation rather than from a measurement, which is why they are the same today as they were in 1959.
Every energy unit here
| Unit | Symbol | One of these is |
|---|---|---|
| Joules | J | the base unit |
| Kilojoules | kJ | 1000 joule |
| Calories | cal | 4.184 joule |
| Kilocalories | kcal | 4184 joule |
| Watt-hours | Wh | 3600 joule |
| Kilowatt-hours | kWh | 3600000 joule |
| British thermal units | BTU | 1055.0559 joule |
| Foot-pounds | ft·lbf | 1.3558179 joule |
Source: NIST Special Publication 811 — the thermochemical calorie is exactly 4.184 J
Questions people actually ask
- How many foot-pounds are in a kilojoule?
- 737.56215. A pound-force acting through one foot. The same arithmetic as the torque unit of that name, and a different quantity: this one is work done, not twist applied.
- How do I convert foot-pounds back to kilojoules?
- Divide by 737.56215, or multiply by 0.0013558179 — they are the same operation.
Other energy conversions
Foot-pounds to kilojoules — the same conversion the other way.