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ft·lbf/s
Powerimperialengineeringhistorical

What is a foot-pound per second?

Historical US mechanical power unit — 1.356 W

Definition

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.

Common uses

  • Older US mechanical-engineering calculations
  • Some US physics textbooks
  • Classical-mechanics problems

🌍 Real-world scale

Largely historical; modern specs use W or hp.

Convert from foot-pounds per second

7 conversions
Foot-Pound per Second to Watt1 ft·lbf/s = 1.35582 WFoot-Pound per Second to Kilowatt1 ft·lbf/s = 0.001356 kWFoot-Pound per Second to Megawatt1 ft·lbf/s = 1.3558e-6 MWFoot-Pound per Second to Mechanical Horsepower1 ft·lbf/s = 0.001818 hpFoot-Pound per Second to Metric Horsepower1 ft·lbf/s = 0.001843 PSFoot-Pound per Second to BTU per Hour1 ft·lbf/s = 4.62624 BTU/hFoot-Pound per Second to Volt-Ampere1 ft·lbf/s = 1.35582 VA

Convert to foot-pounds per second

7 conversions
Watt to Foot-Pound per Second1 W = 0.7376 ft·lbf/sKilowatt to Foot-Pound per Second1 kW = 737.562 ft·lbf/sMegawatt to Foot-Pound per Second1 MW = 737,562.15 ft·lbf/sMechanical Horsepower to Foot-Pound per Second1 hp = 550 ft·lbf/sMetric Horsepower to Foot-Pound per Second1 PS = 542.476 ft·lbf/sBTU per Hour to Foot-Pound per Second1 BTU/h = 0.2162 ft·lbf/sVolt-Ampere to Foot-Pound per Second1 VA = 0.7376 ft·lbf/s

Tips

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

Common mistakes

  • 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.

FAQ about the foot-pound per second

What is a foot-pound per second?
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.
Where is the foot-pound per second used?
The foot-pound per second is commonly used for: Older US mechanical-engineering calculations; Some US physics textbooks; Classical-mechanics problems.
What is an example of a foot-pound per second in real life?
Largely historical; modern specs use W or hp.
What category does the foot-pound per second belong to?
The foot-pound per second is a unit of power, part of the 8-unit power category on UnitConv.
How accurate are foot-pound per second conversions?
All conversion factors follow NIST and BIPM international standards to 8 significant figures — the highest practical accuracy.
Explore all 8 power units and their conversions.⚡ Power hub →