Watts to BTU/hour Converter
Convert watts to btu/hour with a free calculator
How to Convert Watts to BTU/hour
Formula: 1 W = 3.412141635 BTU/hr
Multiply your watts value by 3.412141635 to get the equivalent in btu/hour. The conversion factor 3.412141635 is based on the internationally accepted definitions of both units.
Watts to BTU/hour Reference Table
| Watts (W) | BTU/hour (BTU/hr) |
|---|---|
| 1 W | 3.412141635 BTU/hr |
| 5 W | 17.06070818 BTU/hr |
| 10 W | 34.12141635 BTU/hr |
| 25 W | 85.30354088 BTU/hr |
| 50 W | 170.6070818 BTU/hr |
| 100 W | 341.2141635 BTU/hr |
| 500 W | 1706.070818 BTU/hr |
| 1000 W | 3412.141635 BTU/hr |
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Frequently Asked Questions
How many BTU/hr is 1,000 watts? +
1,000 watts equals approximately 3,412 BTU/hr.
How do I size a heater in BTU/hr? +
A rough rule: multiply the square footage by 20 BTU/hr for moderate climates. A 500 sqft room needs about 10,000 BTU/hr (2,931 watts).
Why do HVAC systems use BTU/hr instead of watts? +
The HVAC industry in the US developed around imperial units. BTU/hr is deeply embedded in building codes, equipment specs, and contractor practices.