Convert foot-pounds per second to BTU per hour

1 ft·lbf/s=4.62624BTU/h

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

You have

Equals

4.626243

Conversion formula

Forward

BTU per hour = foot-pounds per second × 4.62624

Reverse

foot-pounds per second = BTU per hour × 0.2162

Example: 10 ft·lbf/s × 4.62624 = 46.2624 BTU/h.

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 →

BTU per Hour

BTU/h

BTU per hour equals 0.293 watts. It is the standard power unit for US HVAC — air conditioners, heaters and boilers. A 24,000 BTU/h AC provides 7 kW of cooling.

Real-world: Small window AC: 5000 BTU/h. Central AC: 24,000 BTU/h. Home furnace: 80,000 BTU/h.

Read full btu per hour reference →

Foot-Pound per Second to BTU per Hour conversion table

Common foot-pounds per second to BTU per hour values for quick reference.

Foot-Pound per Second (ft·lbf/s)	BTU per Hour (BTU/h)
1 ft·lbf/s	4.62624 BTU/h
5 ft·lbf/s	23.1312 BTU/h
10 ft·lbf/s	46.2624 BTU/h
50 ft·lbf/s	231.312 BTU/h
100 ft·lbf/s	462.624 BTU/h
500 ft·lbf/s	2,313.12 BTU/h
1,000 ft·lbf/s	4,626.24 BTU/h
5,000 ft·lbf/s	23,131.21 BTU/h
10,000 ft·lbf/s	46,262.43 BTU/h
50,000 ft·lbf/s	231,312.14 BTU/h

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 BTU per hour in a foot-pound per second?

One foot-pound per second equals 4.62624 BTU per hour.

How do I convert foot-pounds per second to BTU per hour?

Multiply the foot-pound per second value by 4.62624 to get the equivalent in BTU per hour.

What is 100 foot-pounds per second in BTU per hour?

100 foot-pounds per second equals 462.624 BTU per hour.

Is a foot-pound per second bigger than a btu per hour?

Yes. 1 foot-pound per second equals 4.62624 BTU per hour, so one foot-pound per second is larger.

How to convert foot-pounds per second to BTU per hour without a calculator?

Multiply by 4.63 for a quick estimate; use a calculator for precise results.

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