Cooling Load Calculator

Calculate heat gain and air conditioning sizing

Building Parameters

Floor Area (sq ft)

Ceiling Height (ft)

Design Outside Temp (°F)

Design Inside Temp (°F)

Window Area (sq ft)

Window Orientation

Number of Occupants

Appliance Load (Watts)

Lighting Load (Watts)

Envelope:2147 BTU/hrRoof:2000 BTU/hrWindows:30000 BTU/hrOccupants:1800 BTU/hrLighting:5118 BTU/hrEquipment:6824 BTU/hrVentilation:2816 BTU/hr

Sensible Load:48817 BTU/hrLatent Load:1888 BTU/hrSHR:0.96

Total Cooling Load

50705 BTU/hr

Design Load (with 15% safety)

58310 BTU/hr

4.86 tons calculated

Recommended AC Size

5.0 tons

Notes:

• Ventilation: 80 CFM outdoor air

• SHR of 0.96 indicates humidity load

• Consider variable speed equipment for better humidity control

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MyCalcBuddy Editorial Team

This page is maintained as an educational calculator reference.

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Formula Source: Standard Mathematical References

by Various

ðŸ”„Last reviewed: May 2026

âœ“Formula checks are based on standard references and internal QA review.