Horsepower to Foot-pounds per Second
Convert horsepower to foot-pounds per second instantly. 1 hp = 550 ft·lb/s. Includes the exact factor, a conversion table of common values and the definition of both units.
How to convert horsepower to foot-pounds per second
To convert horsepower to foot-pounds per second, multiply by 550. The relationship is fixed, so the same factor works for any quantity — there is nothing to look up and nothing that changes with temperature, location or context.
ft·lb/s = hp × 550
Horsepower to Foot-pounds per Second conversion table
The values people look up most often, rounded for reading. Use the calculator above for anything in between.
| Horsepower | Foot-pounds per Second |
|---|---|
| 1 hp | 550 ft·lb/s |
| 2 hp | 1,100 ft·lb/s |
| 3 hp | 1,650 ft·lb/s |
| 5 hp | 2,750 ft·lb/s |
| 10 hp | 5,500 ft·lb/s |
| 20 hp | 11,000 ft·lb/s |
| 25 hp | 13,750 ft·lb/s |
| 50 hp | 27,500 ft·lb/s |
| 100 hp | 55,000 ft·lb/s |
| 500 hp | 275,000 ft·lb/s |
| 1,000 hp | 550,000 ft·lb/s |
What is a horsepower?
Mechanical horsepower, defined as 550 foot-pounds per second.
What is a foot-pounds per second?
The unit horsepower was originally defined against.
The formula
ft·lb/s = hp × 550
Every result on this page comes from this formula. Nothing is rounded until the final display, so figures match a spreadsheet to the cent.
How to use the Horsepower to Foot-pounds per Second
- Type the number of horsepower you want to convert.
- Read the result in foot-pounds per second straight away — there is no button to press.
- Check the table below for the values that come up most often, or reverse the conversion with the linked foot-pounds per second to horsepower page.
Horsepower to Foot-pounds per Second — frequently asked questions
How many foot-pounds per second are in a horsepower?
One horsepower equals 550 ft·lb/s. ft·lb/s = hp × 550
What is the formula to convert horsepower to foot-pounds per second?
The formula is ft·lb/s = hp × 550. It is an exact definition rather than an approximation, so the conversion never drifts no matter how large the number.
How do I convert foot-pounds per second back to horsepower?
Divide instead of multiplying: one foot-pounds per second is 0.0018181818 hp. The reverse converter is linked in the related tools list.
Is this conversion exact?
Yes. Both units are defined against the same base unit by international agreement, so the factor is exact — any rounding you see is only in the display, which you can widen by entering more decimal places.
Is this horsepower to foot-pounds per second free to use?
Yes. Every calculator on the site is free, needs no sign-up, and runs entirely in your browser, so your figures never leave your device.
What people search for
This page answers each of these searches. They are the exact phrases visitors use to find the horsepower to foot-pounds per second.
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About this calculator
Written and reviewed by The Samsung Calculator editorial team. Every calculator is written against a published formula, reviewed against at least one independent reference implementation, and dated when it changes.
Last reviewed August 19, 2026 · Calculation runs client-side · No data collected · Report an error