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Power and Energy

ft·lbf/stoBTU/s

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

Factor1 ft·lbf/s = 0.001285067 BTU/s

Converter

ft·lbf/s

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

Result
1.28507BTU/s

Rendered to 6 significant figures.

Formula

Formula
BTU/s = ft·lbf/s × 0.001285067

Multiply any value in foot-pounds force per second by 0.001285067 to obtain the value in British thermal units per second.

Worked example

Convert 1000 ft·lbf/s to BTU/s.

  1. 01Start with 1000 ft·lbf/s.
  2. 02Multiply by the conversion factor: 1000 × 0.001285067 = 1.28507 BTU/s.
Result1000 ft·lbf/s = 1.28507 BTU/s

Conversion table

ft·lbf/sBTU/s
10.0012851
20.0025701
50.0064253
100.012851
200.025701
500.064253
1000.12851
2000.25701
5000.64253
10001.2851

Reference values rounded to 5 significant figures for display.

FAQ

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