BTU Calculator

AC BTU Calculator

Use this calculator to estimate the cooling needs of a typical room or house, such as finding out the power of a window air conditioner needed for an apartment room or the central air conditioner for an entire house.

Room Size (square feet)

Room Ceiling Height (feet)

Number of People Inside Regularly

Room Type

Insulation Condition

Sun Exposure

Climate

Recommended Cooling Capacity

0 BTU

This is the estimated BTU required to cool your space effectively.

Recommendation

General Purpose BTU Calculator

This is a general purpose calculator that helps estimate the BTUs required to heat or cool an area. The desired temperature change is the necessary increase/decrease from outdoor temperature to reach the desired indoor temperature.

Room/House Width (feet)

Room/House Length (feet)

Ceiling Height (feet)

Insulation Condition

Desired Temperature Change (°F) e.g. 75°F for Boston winter, 45°F for Atlanta winter.

Example: An unheated Boston home during winter could reach temperatures as low as -5°F. To reach a temperature of 75°F, it requires a desired temperature increase of 80°F.

Required BTU Capacity

0 BTU

This is the estimated BTU required to heat or cool your space effectively.