Convert Foot-pounds/min to BTU per Hour

About converting Foot-pounds/min to BTU per Hour

Foot-pounds/min (ft·lb/min) and BTU per Hour (BTU/h) are both units of power, so converting between them is a single multiplication: multiply your Foot-pounds/min figure by 0.0771. Ten Foot-pounds/min comes to 0.771 BTU per Hour, and a hundred works out at 7.7104 BTU per Hour.

Rule of thumb: going from Foot-pounds/min to BTU per Hour divides, so the figure always shrinks — it takes about 12.9695 Foot-pounds/min to make a single BTU per Hour. If your answer came out bigger, you have the conversion the wrong way round.

What is a Foot-pound per Minute?

The foot-pound per minute is the raw ingredient horsepower was built from. It is exactly what it says: the work of lifting a pound through a foot, done once a minute. James Watt’s original estimates of what a horse could do were made in these terms, and mechanical horsepower is still formally defined as 33,000 of them — which is why horsepower converts to such an untidy number of watts. On its own the unit is now mostly a teaching device and a fixture of older American engineering texts, appearing where someone wants to show the arithmetic behind a horsepower rating rather than simply quote it.

What is a BTU per Hour?

BTU per hour is the unit American heating and cooling equipment is sized in: furnaces, boilers, air conditioners and heat pumps all carry a BTU/h rating. It is a rate of heat flow — genuinely a power, in the same family as the watt — but the "per hour" is dropped so routinely in advertising that a "12,000 BTU air conditioner" reads as normal, which quietly confuses a quantity of energy with a rate of delivering it. It also inherits the BTU’s vagueness: several BTU definitions exist and differ by a fraction of a percent, so any conversion here rests on one chosen convention.

To put both in perspective: someone climbing stairs steadily works at a few thousand foot-pounds per minute, while a window air conditioner is usually 5,000 to 12,000 BTU per hour.

The converter above updates as you type, and the table lists common values for quick reference. Need the opposite direction? Use the BTU per Hour to Foot-pounds/min converter, or browse all Power converters.