Convert Foot-pound to megawatt hour

The watt (W) is a unit of power, the rate at which energy is used or produced. The watt-hour (Wh) is a unit of energy, one watt sustained for one hour, and is what this page converts: a 2 kW heater running for 3 hours uses 6 kWh, and an electricity bill counts kWh. 'Watts per hour' (W/h) would be a rate of change of power, is rarely needed, and is not the same thing as a watt-hour.

The foot-pound is the work of a one-pound force over one foot, 1.356 J. It is used in the US for the muzzle energy of firearms and airguns (a .22 rifle delivers about 100 ft·lb, a hunting rifle 2,000–3,000) and for the impact energy of tools and hammers. Do not confuse it with the pound-foot of torque: the same product of force and distance, but nothing moves, so it is not energy.