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Power and Energy

ft·lbf/stoBTU/hr

Convert foot-pounds force per second (ft·lbf/s) to British thermal units per hour (BTU/hr).

Factor1 ft·lbf/s = 4.626243 BTU/hr

Converter

ft·lbf/s

Accepts numbers or expressions, e.g. 150 + 14.7

Result
462.624BTU/hr

Rendered to 6 significant figures.

Formula

Formula
BTU/hr = ft·lbf/s × 4.626243

Multiply any value in foot-pounds force per second by 4.626243 to obtain the value in British thermal units per hour.

Worked example

Convert 100 ft·lbf/s to BTU/hr.

  1. 01Start with 100 ft·lbf/s.
  2. 02Multiply by the conversion factor: 100 × 4.626243 = 462.624 BTU/hr.
Result100 ft·lbf/s = 462.624 BTU/hr

Conversion table

ft·lbf/sBTU/hr
14.6262
29.2525
523.131
1046.262
2092.525
50231.31
100462.62
200925.25
5002313.1
10004626.2

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from ft·lbf/s to BTU/hr?
1 ft·lbf/s equals 4.626243 BTU/hr. To convert, multiply the value in foot-pounds force per second by 4.626243.
How do I convert 1 ft·lbf/s to BTU/hr?
1 ft·lbf/s = 4.62624 BTU/hr. For any value, multiply by 4.626243.
How do I convert BTU/hr back to ft·lbf/s?
Divide by the same factor — or equivalently, multiply by 0.2161581. So 1 BTU/hr = 0.216158 ft·lbf/s.
When would I need to convert foot-pound force per second to British thermal unit per hour?
Power conversions are common when comparing motor ratings (often kW or hp), thermal duty (BTU/hr or kW), and utility consumption in mixed-unit projects.
Is the conversion exact?
The factor shown is precise to at least 7 significant figures. For most process-engineering work this is far better than instrument accuracy. For metrology or trade applications, refer to the relevant national standard (NIST, BIPM, ISO 80000).

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