Heating BTU Calculator
Estimate BTU capacity needed to heat a room based on insulation and climate.
Room Area (sq ft)
Ceiling Height (ft)
Insulation Quality
Excellent (R-30+ walls, R-50+ attic)
Average
Poor (old home, drafty)
Very Poor (no insulation)
Outside Design Temp (°F)
Inside Target Temp (°F)
Number of Exterior Walls
Calculate