Convert BTU to Watt-Hours

The Conversion Formula

To convert BTU to watt-hours, multiply the value by the conversion factor: 1 BTU = 0.293072 Wh. For a worked example, suppose you need to convert 25 BTU to watt-hours: 25 × 0.293072 = 7.3268 Wh. To convert in the opposite direction, divide by 0.293072, or equivalently multiply by 3.4121.

About BTU

The British Thermal Unit (BTU) is the imperial counterpart to the calorie. It is the heat needed to raise 1 pound of water by 1°F. Despite its name, it is almost exclusively used in the United States today, particularly for heating (furnaces) and cooling (air conditioners). BTU are commonly used in AC unit ratings, Gas grills, Furnaces, and Water heaters, Propane tanks.

Burning a single wooden match releases about 1 BTU.

About watt-hours

The watt-hour (Wh) is a smaller version of the kilowatt-hour. It is the standard for rating the capacity of batteries in laptops, smartphones, and power banks. Airlines often limit spare batteries to 100Wh for safety. watt-hours are commonly used in Laptop batteries, Power banks, Smartphone specs, and Drone batteries, Portable speakers.

A typical phone battery holds 10-15 Wh.

When Would You Convert BTU to watt-hours?

Converting between btu and watt-hours is one of the most common energy conversions. You might need this conversion when working with international specifications, following instructions written for a different measurement system, or comparing values across different standards. Having the conversion factor (1 BTU = 0.293072 Wh) memorized or bookmarked can save time in professional and everyday contexts alike.