BTU Calculator
Converts electrical power and run time into an approximate energy amount in British thermal units.
How it works
Converts electrical power and run time into an approximate energy amount in British thermal units.
Formula and assumptions
Energy in BTU ≈ watts × hours × 3.412142. This is an energy conversion, not an HVAC sizing recommendation.
Example
Use the sample values, calculate, and change one input at a time.
Frequently asked questions
Are results exact? Results depend on the assumptions and inputs above.
Can I use this for professional decisions? Verify critical results independently.
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Frequently asked questions
Is this an HVAC sizing calculator?
No. It converts watt-hours to BTU and does not size heating or cooling equipment.
What should I check before relying on the result?
Confirm the input units and assumptions described above; independently verify safety-critical, medical, financial or professional decisions.