Convert Foot-pounds per Second to Watts
1 foot-pound per second (ft·lbf/s) equals 1.355817948 watts (W).
1 ft·lbf/s = 1.355817948 W
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk foot-pound per second to watt converter to paste a column from Excel.
How to Convert Foot-pound per Second to Watt
- 1 ft·lbf/s = 1.355817948 W
- 1 W = 0.7375621493 ft·lbf/s
- Example: convert 15 ft·lbf/s to W: 15 ft·lbf/s = 15 × 1.355817948 W = 20.33726922 W
Formula
W = ft·lbf/s × 1.355817948331
Derivation from SI units:
- 1 ft·lbf/s = 1.3558179483314 W
- 1 W = 1 J/s = 1 kg·m²·s⁻³
Both units are defined exactly, so the factor is exact. Foot-pound per Second definition: foot-pound per second; Watt definition: watt.
Worked examples
- A reading of 100 ft·lbf/s converts to 135.5817948 W.
100 ft·lbf/s × 1.355817948 = 135.5817948 W - A value of 1000 ft·lbf/s is 1355.817948 W.
1000 ft·lbf/s × 1.355817948 = 1355.817948 W
Foot-pound per Second to Watt conversion table
| Foot-pounds per Second (ft·lbf/s) | Watts (W) |
|---|---|
| 1 ft·lbf/s | 1.355817948 W |
| 10 ft·lbf/s | 13.55817948 W |
| 50 ft·lbf/s | 67.79089742 W |
| 100 ft·lbf/s | 135.5817948 W |
| 250 ft·lbf/s | 338.9544871 W |
| 550 ft·lbf/s | 745.6998716 W |
| 1000 ft·lbf/s | 1355.817948 W |
| 2750 ft·lbf/s | 3728.499358 W |
| 5000 ft·lbf/s | 6779.089742 W |
| 10000 ft·lbf/s | 13558.17948 W |
Where it's used
Foot-pounds per Second are used for mechanics problems in US units, while watts appear in electrical appliance ratings. Both measure power (energy per unit time), so the conversion is a fixed factor.
Foot-pound per Second to other power units
| Conversion | 1 ft·lbf/s equals |
|---|---|
| foot-pound per second to watt | 1.355817948 W |
| foot-pound per second to milliwatt | 1355.817948 mW |
| foot-pound per second to kilowatt | 0.001355817948 kW |
| foot-pound per second to megawatt | 0.000001355817948 MW |
| foot-pound per second to horsepower | 0.001818181818 hp |
| foot-pound per second to metric horsepower | 0.001843399392 PS |
| foot-pound per second to BTU per hour | 4.626242868 BTU/h |
| foot-pound per second to refrigeration ton | 0.000385520239 TR |
| foot-pound per second to kilocalorie per hour | 1.165793593 kcal/h |
Frequently asked questions
How many watts are in 1 foot-pound per second?
1 ft·lbf/s = 1.355817948 W.
How do I convert foot-pounds per second to watts?
Multiply the value in ft·lbf/s by 1.355817948. For example, 15 ft·lbf/s × 1.355817948 = 20.33726922 W.
Is the ft·lbf/s to W conversion exact?
Yes. Both units are defined exactly, so the ratio is exact; its decimal form does not terminate and is shown here to 10 significant figures (more with the precision selector).
Sources
- Guide for the Use of the International System of Units (SI), NIST Special Publication 811, 2008 Edition, National Institute of Standards and Technology , Appendix B.8, "foot pound-force per second".
- The International System of Units (SI), 9th edition (SI Brochure), Bureau International des Poids et Mesures , Table 4, coherent derived units with special names.
Last reviewed: . Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.
Cite this page
APA
Scientific Converters. (2026, October 15). Convert Foot-pounds per Second to Watts. Retrieved October 17, 2026, from https://scientificconverters.com/power/foot-pounds-per-second-to-watts/
IEEE
Scientific Converters, "Convert Foot-pounds per Second to Watts," scientificconverters.com. Accessed: Oct. 17, 2026. [Online]. Available: https://scientificconverters.com/power/foot-pounds-per-second-to-watts/