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HVAC System Sizing Calculator

Below find a helpful tool that can help you size your HVAC system. Keep in mind, we highly recommend hiring a local professional to size your system properly to avoid under or oversizing your equipment.

HVAC System Size Calculator

Enter your space details to estimate the cooling capacity (BTU/hr) you need.

Measure only the conditioned area (not garages, attics, etc.).
Better insulation needs fewer BTUs per square foot. Poor insulation needs more.
Hot climates drive higher cooling load, especially with direct sun.
Adds sensible heat load. Rule of thumb: ~600 BTU/hr per extra person after the first two.

Recommended Capacity

Estimated cooling load:
— BTU/hr
Approximate tonnage:
— tons
Typical system match:
—

This is an estimate. Final system sizing should be confirmed by a licensed HVAC professional with a full Manual J style load calculation, which also considers windows, duct losses, ceiling height, and sun exposure.