Convert foot-pounds per second to mechanical horsepower

1 ft·lbf/s=0.001818hp

Use the converter below to change any foot-pounds per second value into mechanical horsepower instantly — with formula, conversion table, and real-world examples.

You have

Equals

0.0018182

Conversion formula

Forward

mechanical horsepower = foot-pounds per second × 0.001818

Reverse

foot-pounds per second = mechanical horsepower × 550

Example: 10 ft·lbf/s × 0.001818 = 0.01818 hp.

About both units

From

Foot-Pound per Second

ft·lbf/s

Foot-pound per second equals 1.356 watts. Historical US mechanical-engineering unit, now largely replaced by watts or hp. Still appears in older engineering texts.

Real-world: Largely historical; modern specs use W or hp.

Read full foot-pound per second reference →

Mechanical Horsepower

Mechanical horsepower equals 745.7 watts — James Watt's 1782 definition based on horse labor. Used in US car engines, aircraft and some industrial equipment. US muscle cars quote hp; European cars usually kW or PS.

Real-world: Base Ford Mustang: ~310 hp. Lawn mower: 5 hp. Average car: 150–200 hp.

Read full mechanical horsepower reference →

Foot-Pound per Second to Mechanical Horsepower conversion table

Common foot-pounds per second to mechanical horsepower values for quick reference.

Foot-Pound per Second (ft·lbf/s)	Mechanical Horsepower (hp)
1 ft·lbf/s	0.001818 hp
5 ft·lbf/s	0.009091 hp
10 ft·lbf/s	0.01818 hp
50 ft·lbf/s	0.09091 hp
100 ft·lbf/s	0.1818 hp
500 ft·lbf/s	0.9091 hp
1,000 ft·lbf/s	1.81818 hp
5,000 ft·lbf/s	9.09091 hp
10,000 ft·lbf/s	18.1818 hp
50,000 ft·lbf/s	90.9091 hp

Tips & common mistakes

Quick tips

1 ft·lbf/s = 1.356 W.
550 ft·lbf/s = 1 mechanical hp.
Rarely needed today outside archival references.

Avoid these

Confusing ft·lbf/s (power) with ft·lbf (torque or work).
Using in modern specifications — prefer W or kW.
Mixing with foot-pound (energy) in same calculation.

Frequently asked questions

How many mechanical horsepower in a foot-pound per second?

One foot-pound per second equals 0.001818 mechanical horsepower.

How do I convert foot-pounds per second to mechanical horsepower?

Multiply the foot-pound per second value by 0.001818 to get the equivalent in mechanical horsepower.

What is 100 foot-pounds per second in mechanical horsepower?

100 foot-pounds per second equals 0.1818 mechanical horsepower.

Is a foot-pound per second bigger than a mechanical horsepower?

No. 1 foot-pound per second equals 0.001818 mechanical horsepower, so one foot-pound per second is smaller.

How to convert foot-pounds per second to mechanical horsepower without a calculator?

Multiply by 0 for a quick estimate; use a calculator for precise results.

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