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Power and Energy

BTU/hrtoft·lbf/s

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

Factor1 BTU/hr = 0.2161581 ft·lbf/s

Converter

BTU/hr

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

Result
2161.58ft·lbf/s

Rendered to 6 significant figures.

Formula

Formula
ft·lbf/s = BTU/hr × 0.2161581

Multiply any value in British thermal units per hour by 0.2161581 to obtain the value in foot-pounds force per second.

Worked example

Convert 10000 BTU/hr to ft·lbf/s.

  1. 01Start with 10000 BTU/hr.
  2. 02Multiply by the conversion factor: 10000 × 0.2161581 = 2161.58 ft·lbf/s.
Result10000 BTU/hr = 2161.58 ft·lbf/s

Conversion table

BTU/hrft·lbf/s
10.21616
20.43232
51.0808
102.1616
204.3232
5010.808
10021.616
20043.232
500108.08
1000216.16

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from BTU/hr to ft·lbf/s?
1 BTU/hr equals 0.2161581 ft·lbf/s. To convert, multiply the value in British thermal units per hour by 0.2161581.
How do I convert 1 BTU/hr to ft·lbf/s?
1 BTU/hr = 0.216158 ft·lbf/s. For any value, multiply by 0.2161581.
How do I convert ft·lbf/s back to BTU/hr?
Divide by the same factor — or equivalently, multiply by 4.626243. So 1 ft·lbf/s = 4.62624 BTU/hr.
When would I need to convert British thermal unit per hour to foot-pound force per second?
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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