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Power and Energy

BTU/stoft·lbf/s

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

Factor1 BTU/s = 778.1693 ft·lbf/s

Converter

BTU/s

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

Result
778.169ft·lbf/s

Rendered to 6 significant figures.

Formula

Formula
ft·lbf/s = BTU/s × 778.1693

Multiply any value in British thermal units per second by 778.1693 to obtain the value in foot-pounds force per second.

Worked example

Convert 1 BTU/s to ft·lbf/s.

  1. 01Start with 1 BTU/s.
  2. 02Multiply by the conversion factor: 1 × 778.1693 = 778.169 ft·lbf/s.
Result1 BTU/s = 778.169 ft·lbf/s

Conversion table

BTU/sft·lbf/s
1778.17
21556.3
53890.8
107781.7
2015563
5038908
10077817
2001.5563e+5
5003.8908e+5
10007.7817e+5

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from BTU/s to ft·lbf/s?
1 BTU/s equals 778.1693 ft·lbf/s. To convert, multiply the value in British thermal units per second by 778.1693.
How do I convert 1 BTU/s to ft·lbf/s?
1 BTU/s = 778.169 ft·lbf/s. For any value, multiply by 778.1693.
How do I convert ft·lbf/s back to BTU/s?
Divide by the same factor — or equivalently, multiply by 0.001285067. So 1 ft·lbf/s = 0.00128507 BTU/s.
When would I need to convert British thermal unit per second 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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