Foot Pounds per Minute to BTU per Hour Converter
Enter a foot-pounds per minute value and instantly get the equivalent in BTU per hour. 1 ft·lbf/min = 0.077069 BTU/hr.
ft·lbf/min to BTU/hr Converter
Formula: BTU/hr = ft·lbf/min × 0.077069 (or ÷ 12.9694)
Common Conversion Values
| Foot-Pounds per Minute (ft·lbf/min) | BTU per Hour (BTU/hr) |
|---|
ft·lbf/min and BTU/hr in Practice
Foot-pound per minute (ft·lbf/min) expresses power as mechanical work per unit time. It appears in older American mechanical engineering references and some pump or motor performance sheets. One foot-pound is the energy needed to lift one pound by one foot against gravity, so a machine producing 33,000 ft·lbf/min develops exactly one mechanical horsepower.
BTU per hour (BTU/hr) is the standard American unit for thermal power — the rate at which heat is transferred. HVAC equipment such as air conditioners, furnaces, and heat pumps are routinely rated in BTU/hr. A 12,000 BTU/hr unit equals one "ton" of cooling capacity.
The conversion ties these two power measures together through the mechanical equivalent of heat: 1 BTU equals approximately 778.169 foot-pounds of mechanical energy. Because one hour contains 60 minutes, one BTU/hr corresponds to 778.169 / 60 ≈ 12.9694 ft·lbf/min, and therefore 1 ft·lbf/min = 1 / 12.9694 ≈ 0.077069 BTU/hr.
Practical example: a pump delivering 5,000 ft·lbf/min of hydraulic work generates the thermal equivalent of 5,000 × 0.077069 ≈ 385 BTU/hr — useful when sizing heat exchangers or evaluating system efficiency losses.
Summary
Enter a foot-pounds per minute value and instantly get the equivalent in BTU per hour. 1 ft·lbf/min = 0.077069 BTU/hr.
How it works
- Enter a power value in foot-pounds per minute.
- The converter divides by 12.9694 (the exact BTU/hr-to-ft·lbf/min factor) to get BTU/hr.
- Results update as you type — no button press needed.
- Scroll to the reference table for pre-calculated common values.
Use cases
- Converting mechanical power output to thermal equivalent for HVAC load analysis.
- Translating older American mechanical engineering specs into BTU/hr for equipment sizing.
- Cross-checking power ratings when mixing thermal and mechanical unit systems.
- Educational verification of energy-unit relationships in thermodynamics coursework.