Live tool/tool/ac-btu-estimator
AC BTU Estimator
Estimate room cooling capacity from square footage, ceiling height, sun exposure, occupancy, and internal heat load.
HomeHVACPlanning
Assumption
A common quick rule of thumb starts around 20 BTU per square foot, then adjusts for height, sun, occupancy, and internal gains.
Recommended size
9,000 BTU/hr
Approx. tonnage
0.75 tons
Base load
6,400 BTU/hr
People load
600 BTU/hr
Equipment load
1,535 BTU/hr
Use case
This is a quick room-sizing estimate, not a Manual J replacement for whole-home HVAC design.