Free HVAC BTU Sizing Calculator

Calculate the optimal air conditioning power required for your space with precision and energy efficiency in mind.

Room Dimensions

Unit of Measure

Ceiling Height

Room Width

Room Length

Environment & Occupancy

Sun Exposure

Insulation Quality

Occupants

Appliances

Recommended Cooling

BTU per hour

Suggested Tonnage: 0.0 Tons

Efficiency Optimal Size

Why Sizing Matters

An AC unit that is too small won't cool your room, while one that is too large will cycle on/off too frequently, leading to poor humidity control and high energy bills.