Horsepower to Foot Pounds Per Second
Mechanical horsepower, about 745.7 watts, is the traditional unit for rating car and engine power in the US and UK. Foot-pounds per second measures power as force times distance per time; 550 ft·lbf/s equals exactly 1 horsepower. 1 hp equals 550 ft·lbf/s, so converting between them is a matter of multiplying by that fixed factor — type any value into the converter below and both sides update instantly as you type.
Both units belong to power, measured here against power's base unit (W) — every other power unit on this site converts through that same reference point, which is why the table below can also be read as a quick cross-check against nearby values.
Formula
ft·lbf/s = hp × 550
hp = ft·lbf/s × ≈0.00181818
Worked example: 5 hp × 550 = 2,750 ft·lbf/s.
Conversion table
| Horsepower (mech.) (hp) | Foot-pound per second (ft·lbf/s) |
|---|---|
| 1 hp | 550 ft·lbf/s |
| 2 hp | 1,100 ft·lbf/s |
| 3 hp | 1,650 ft·lbf/s |
| 5 hp | 2,750 ft·lbf/s |
| 10 hp | 5,500 ft·lbf/s |
| 20 hp | 11,000 ft·lbf/s |
| 25 hp | 13,750 ft·lbf/s |
| 50 hp | 27,500 ft·lbf/s |
| 100 hp | 55,000 ft·lbf/s |
| 250 hp | 137,500 ft·lbf/s |
| 500 hp | 275,000 ft·lbf/s |
| 1,000 hp | 550,000 ft·lbf/s |
Frequently asked
- How many Foot-pounds per second in a horsepower (mech.)?
- 1 hp equals 550 ft·lbf/s.
- How do I convert Horsepower to Foot-pounds per second?
- Multiply the value in hp by 550 to get ft·lbf/s. The converter above does this instantly as you type.
- Is the conversion exact?
- Yes — Horsepower (mech.) and Foot-pound per second are both defined by a fixed conversion factor to power's base unit (W), so the result shown is exact to the precision displayed, not an approximation.