Power rate using BTU per hour.
BTU per hour to Foot-pounds per second Converter — BTU/h to ft-lb/s
Convert BTU per hour (BTU/h) to Foot-pound per second (ft-lb/s) using the exact conversion factor (1 btu per hour = 0.2161581284 foot-pound per second). See the formula, worked examples, and conversion table.
BTU per hour to Foot-pounds per second converter
Converter
Engineering Converter
Convert common stress, force, torque, power, and energy units used in engineering.
Context values
Some unit families need one extra value for a physically accurate result.
Mechanical power rate.
Result = input x 0.2930710702 / 1.355817948.
Power units are compatible.
Reserved above the conversion cards and below the converter.
About Converting BTU per hour to Foot-pounds per second
BTU per hour and Foot-pound per second both measure a quantity used in structural or mechanical engineering — commonly stress, pressure, force, torque, power, or energy — where converting between the unit conventions used in different regions, industries, or equipment specifications is a routine part of design work. Specifically: Power rate using BTU per hour, and mechanical power rate.
Formula
foot-pounds per second = btu per hour × 0.216158128407
This factor comes from each unit's defined relationship to the category's base unit: 1 btu per hour equals 0.293071070172 base units, and 1 foot-pound per second equals 1.35581794833 base units, so dividing one by the other gives the direct btu per hour-to-foot-pound per second factor of 0.216158128407.
Simple example
1 BTU/h × 0.2161581284 = 0.2161581284 ft-lb/s
1 btu per hour = 0.2161581284 foot-pounds per second.
Real-world example
100 BTU/h × 0.2161581284 = 21.61581284 ft-lb/s
100 btu per hour = 21.61581284 foot-pounds per second.
Conversion table
| BTU per hour (BTU/h) | Foot-pound per second (ft-lb/s) |
|---|---|
| 1 BTU/h | 0.2161581284 ft-lb/s |
| 10 BTU/h | 2.161581284 ft-lb/s |
| 50 BTU/h | 10.80790642 ft-lb/s |
| 100 BTU/h | 21.61581284 ft-lb/s |
| 500 BTU/h | 108.0790642 ft-lb/s |
| 1,000 BTU/h | 216.1581284 ft-lb/s |
Reverse conversion: Foot-pound per second to BTU per hour
0.2161581284 ft-lb/s × 4.626242868 = 1 BTU/h
0.2161581284 foot-pounds per second = 1 btu per hour.
btu per hour = foot-pounds per second × 4.62624286844
For a page dedicated to this direction, see Foot-pound per second to BTU per hour.
Understanding the BTU per hour (BTU/h)
Power rate using BTU per hour.
Understanding the Foot-pound per second (ft-lb/s)
Mechanical power rate.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many foot-pounds per second are in 1 btu per hour?
1 btu per hour equals 0.2161581284 foot-pounds per second, using the exact defined conversion factor rather than an estimate.
How do I convert btu per hour to foot-pound per second?
Multiply the btu per hour value by 0.2161581284. The converter above does this instantly to whatever precision you set.
How do I convert foot-pound per second back to btu per hour?
Use the reverse factor: 1 foot-pound per second equals 4.626242868 btu per hour. You can also use the swap control in the converter above to flip the direction instantly.
What is a btu per hour?
BTU per hour (BTU/h) is a unit of engineering.
What is a foot-pound per second?
Foot-pound per second (ft-lb/s) is a unit of engineering.
Is the btu per hour to foot-pound per second conversion exact?
Yes. Both btu per hour and foot-pound per second are defined by fixed standards rather than physical artifacts, so the factor of 0.2161581284 used above is exact to as many digits as you choose to display.
Why do engineering unit conventions vary so much by region and industry?
Pressure, force, and stress can be expressed in metric (pascal, newton), US customary (psi, pound-force), or older and industry-specific units (atmosphere, torr, kip) depending on the country, industry, and even the equipment manufacturer, which is why engineers routinely need to convert between them when working across specs from different sources.