Home & build · NUMORA
Hvac Btu Calculator
Area × height × a rule-of-thumb factor.
Open interactive calculatorHow to use
A BTU sketch from area and temperature delta — not an HVAC design.
Formula
BTU/h ≈ m² × height_m × 140 (dwelling sketch)
FAQ
Is this Hvac Btu calculator accurate?
The formula and assumptions are shown on the page, and the engine is covered by audit tests. Results are for reference — not financial or medical advice.
Do I need an account?
No. Calculations run in your browser. Recents can stay on this device.
What inputs do I need?
A BTU sketch from area and temperature delta — not an HVAC design.
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