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Home Frequently Asked Questions What are British Thermal Units (BTU)?

What are British Thermal Units (BTU)?

British Thermal Units (BTU) is a unit for the measurement of the heat output of a heater or radiator.

When converting from BTU to Watts (W) - simply divide by 3.412
When converting from Watts to BTU - simply multiply by 3.412

See the below table for some example conversions from Watts to BTU.

Power (Watt) Power (BTU/hr)
1 W 3.412142 BTU/hr
10 W 34.121416 BTU/hr
100 W 341.214163 BTU/hr
100 W 3412.141633 BTU/hr

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