The British thermal unit (BTU) is the energy needed to raise one pound of water by one degree Fahrenheit, widely used for heating and air-conditioning ratings.
Btu to Watt hours
Convert British thermal unit (BTU) to Watt-hour (Wh) instantly with an exact formula, conversion table, and FAQ.
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Convert btu (BTU) to watt hours (Wh) instantly with formula, conversion table, and FAQ.
Context values
Some unit families need one extra value for a physically accurate result.
A watt-hour (Wh) is the energy delivered by one watt of power sustained for one hour, equal to 3,600 joules.
Wh = BTU × 0.2930710702
Results update instantly for Btu to Watt hours conversions.
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Formula
Wh = BTU × 0.2930710702
BTU = Wh × 3.412141633
Conversion table
| 1 BTU | 0.293071 Wh |
| 5 BTU | 1.465355 Wh |
| 10 BTU | 2.930711 Wh |
| 20 BTU | 5.861421 Wh |
| 50 BTU | 14.653554 Wh |
| 100 BTU | 29.307107 Wh |
| 500 BTU | 146.535535 Wh |
| 1000 BTU | 293.071070 Wh |
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How the formula works
Both british thermal unit and watt-hour measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in btu by 0.2930710702 to get watt hours. To reverse the conversion, multiply a watt-hour value by 3.412141633 to get back to btu.
Frequently asked questions
What is British thermal unit (BTU)?
The British thermal unit (BTU) is the energy needed to raise one pound of water by one degree Fahrenheit, widely used for heating and air-conditioning ratings.
What is Watt-hour (Wh)?
A watt-hour (Wh) is the energy delivered by one watt of power sustained for one hour, equal to 3,600 joules.
How do I convert btu to watt hours?
Multiply the british thermal unit value by 0.2930710702 to get the equivalent in watt hours. For example, 5 BTU × 0.2930710702 = 1.465355 Wh.
Is this conversion exact?
Yes. Both units are defined against the SI base unit for this dimension, so the factor 0.2930710702 is an exact, non-rounded value.
Can I convert watt hours back to btu?
Yes. Divide the watt-hour value by 0.2930710702, or multiply it by 3.412141633, to get btu.
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About converting btu to watt hours
The British thermal unit (BTU) is the energy needed to raise one pound of water by one degree Fahrenheit, widely used for heating and air-conditioning ratings. A watt-hour (Wh) is the energy delivered by one watt of power sustained for one hour, equal to 3,600 joules.
Use this calculator to move between btu and watt hours accurately for homework, engineering, billing, or everyday energy calculations. The Universal Converter uses exact unit factors, so results stay consistent across the site.