Convert energy units — joules, kilowatt-hours, calories, BTU, electron volts and more.
| Unit | Name | Value |
|---|---|---|
| 0.001 ft·lb | 3.766e-10 kWh | |
| 0.01 ft·lb | 3.76617e-09 kWh | |
| 0.1 ft·lb | 3.76617e-08 kWh | |
| 1 ft·lb | 3.76617e-07 kWh | |
| 5 ft·lb | 1.88308e-06 kWh | |
| 10 ft·lb | 3.76617e-06 kWh | |
| 50 ft·lb | 1.88308e-05 kWh | |
| 100 ft·lb | 3.76617e-05 kWh | |
| 1000 ft·lb | 0.000376617 kWh |
Formula: Kilowatt-Hour = Foot-Pound × 3.7662e-7
Multiply any foot-pound value by 3.7662e-7 to get kilowatt-hour.
Reverse: Foot-Pound = Kilowatt-Hour × 2.655e+06
Common foot-pound values — factor: 1 ft·lb = 3.7662e-7 kWh
| Foot-Pound (ft·lb) | Kilowatt-Hour (kWh) | Context |
|---|---|---|
| 1 ft·lb | 3.766e-07 kWh | 1 ft·lb |
| 10 ft·lb | 3.766e-06 kWh | 10 ft·lb |
| 100 ft·lb | 3.766e-05 kWh | 100 ft·lb |
| 350 ft·lb | 0.0001318 kWh | 9mm pistol |
| 550 ft·lb | 0.0002071 kWh | 1 HP/s |
| 1,000 ft·lb | 0.0003766 kWh | Rifle bullet |
| 3,000 ft·lb | 0.00113 kWh | High-power rifle |
| 1e+04 ft·lb | 0.003766 kWh | 10 kft·lb |
| 1e+05 ft·lb | 0.03766 kWh | 100 kft·lb |
| 1e+06 ft·lb | 0.3766 kWh | 1 Mft·lb |
| 1e+07 ft·lb | 3.766 kWh | 10 Mft·lb |
| 1.000e+09 ft·lb | 376.6 kWh | 1 Gft·lb |
| 1.000e+12 ft·lb | 3.766e+05 kWh | 1 Tft·lb |
| 1.000e+15 ft·lb | 3.766e+08 kWh | 1 Pft·lb |
| 1.000e+18 ft·lb | 3.766e+11 kWh | 1 Eft·lb |
1 ft·lb = 3.7662e-7 kWh. Memorize for instant estimates.
Use 3.7662e-7 as a quick mental multiplier.
Multiply result by 2.655e+06 to recover the original ft·lb value.
Torques bolts and fasteners to specified ft·lb values using a torque wrench.
Rates firearm muzzle energy in ft·lb for US ammunition comparisons.
Calculates impact energy absorption in ft·lb for US building codes.
Measures and compares engine torque output in ft·lb on a dyno.
Specifies fall arrest and impact energy in ft·lb for OSHA compliance.
Evaluates hunting cartridge terminal energy in ft·lb for ethical dispatch.
The foot-pound (ft·lb) is an Imperial unit of energy equal to the work done when a force of one pound-force moves an object one foot, equaling 1.35582 joules. It has been used in British and American engineering since the 18th century.
Foot-pounds are standard in US mechanical engineering for torque specifications, engine output (often ft·lb of torque), and ballistic energy measurements. Rifle bullet energies are commonly quoted in foot-pounds in American publications.
Interesting fact: A typical 9mm pistol bullet has about 350 ft·lb of muzzle energy. The torque specification for tightening a car wheel bolt is typically 80–100 ft·lb. One horsepower equals 550 ft·lb per second.
The kilowatt-hour (kWh) is the commercial unit of electrical energy, equal to the energy consumed by a 1,000-watt appliance in one hour (3,600,000 joules). It became standard with the growth of the electrical grid in the late 19th century.
Electricity bills worldwide are denominated in kWh. A typical household uses 300–1,000 kWh per month. An electric car uses about 15–25 kWh per 100 km. Solar panels generate 250–400 kWh per year per panel.
Interesting fact: The average price of electricity in the US is about $0.12 per kWh. One kWh can run a 100W light bulb for 10 hours, charge a smartphone about 100 times, or power a laptop for 2-3 days.
Converting foot-pound to kilowatt-hour is common across energy, nutrition, engineering, and science. Different sectors use different energy units — joules in physics, kcal in nutrition, kWh in electricity, and BTU in HVAC — making accurate conversion essential for cross-disciplinary work and international comparisons.
Quick reference: 5 ft·lb = 1.8831e-6 kWh and 10 ft·lb = 3.7662e-6 kWh. Reverse: 1 kWh = 2.655e+06 ft·lb. Exact factor: 1 ft·lb = 3.7662e-7 kWh.
All conversions use IEEE 754 double-precision arithmetic, accurate to at least 8 significant figures.