⌕⌘ K
⚡
OTHER
BTU Calculator
Area multiplied by load factor.
Choose a BTU sizing workflowEstimate a general heating load or an adjusted air-conditioning load.
3 optionsGENERAL HEATING OR COOLING LOAD10,000 BTU/h
area × BTU factor. Only inputs needed by this operation are shown.
Estimate based on the values shownFormula checkedGeneral load is area × factor; AC sizing uses room volume × 2.5 with climate, exposure, and insulation adjustments. Detailed sizing combines room volume, temperature delta, occupants, room use, insulation, sun, and climate in imperial or metric dimensions.