Foot-pounds to British Thermal Units Converter

To convert a measurement in foot-pounds to british thermal units, multiply the value by 0.001285067463. The conversion factor comes from the relationship between both units and the joule.

For example, to convert 5 ft·lb to british thermal units: 5 × 0.001285067463 = 0.006425337317 BTU.

A foot-pound is an imperial unit of energy equal to the work done when a force of one pound-force acts through a distance of one foot, about 1.356 joules. The foot-pound comes from imperial mechanics and is still used in the US for torque and energy, notably to describe the muzzle energy of firearms and the output of engines.

Common uses of foot-pounds include: Firearm muzzle energy; Torque specifications (as ft·lbf); Mechanical work in imperial units; Engine and tool energy ratings.

A British thermal unit (BTU) is the energy needed to raise the temperature of one pound of water by one degree Fahrenheit, about 1,055 joules. The BTU arose from imperial heating and steam engineering. It remains the dominant unit for heating, ventilation, and air-conditioning capacity in the United States, where furnaces and air conditioners are rated in BTU.

Common uses of british thermal units include: Air conditioner and furnace ratings; Heating and cooling load calculations; Natural gas and fuel energy content; HVAC system sizing in the US.

Here are some common values converted:

1 ft·lb = 0.001285067463 BTU 5 ft·lb = 0.006425337317 BTU 10 ft·lb = 0.012850674635 BTU 50 ft·lb = 0.064253373173 BTU 100 ft·lb = 0.128506746346 BTU