basic

Home Heating BTU Requirement Calculator

BTU/hr ≈ area × ΔT × insulation factor — heating load.

Estimates the heating BTU/hour required for a room or home from floor area, temperature difference, and insulation quality.

Priya Venkatesan By Priya Venkatesan
Published Last reviewed 1 min read

Inputs

Results

Enter values and click Calculate to see results.
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How to use this calculator

  1. Fill in the inputs above using the units you already have.
  2. Values update automatically as you type — no submit button needed.
  3. Hover any result row for the underlying formula and intermediate values.

Formula

BTU/hr ≈ area_sqft × ΔT(°F) × U-value_factor

In depth

Estimates the heating BTU/hour required for a room or home from floor area, temperature difference, and insulation quality.