BTU & Heat Load Calculator

Get a quick cooling load for a space from its area, insulation/climate, occupants, and window area. A fast square-foot estimate — not a substitute for a Manual J.

Space

Area (ft²)

Insulation / Climate

Occupants

Window Area (ft²)

Cooling Load (est.)

Total Load28,200 BTU/hr

Tons2.35 tons

Base (area)25,000 BTU/hr

People800 BTU/hr

Windows2,400 BTU/hr

Quick square-foot estimate — NOT a substitute for a Manual J load calc.

Run your whole job on the same numbers

These NORDIX tools are a taste of the full platform — bid pipeline, estimating, and job costing that carry your numbers from the first bid to the final invoice.

See what NORDIX does →