BTU Calculator

Calculation Settings

Select calculation method and load type

Calculation Method

Load Type

Temperature Unit

Measurement Units

Room Specifications

Choose how to input room size and dimensions

Input Method

Use Dimensions

Use Area

Common Rooms

Room Length (feet)

Room Width (feet)

Ceiling Height (feet)

Insulation & Climate

Select insulation level and climate zone

Insulation Level

Climate Zone

Custom Design Temperature (°F)

Optional: Override the climate zone design temperature

Windows & Doors

Specify windows and doors for heat loss/gain

Number of Windows

Window Size

Number of Doors

Door Size

Additional Factors

Specify additional load factors

Occupancy

Appliance Load (BTU)

Include Air Infiltration

Include Solar Gain

Enter your room specifications to calculate heating and cooling BTU requirements