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HVAC Calculator

Free hvac calculator to estimate heating load. Instant results in your browser — no signup.

Also known as: Estimate heating load, heating BTU calculator, Estimate AC / BTU requirement, Estimate air conditioner capacity, estimate heating load calculator, heating btu calculator, estimate heating load, hvac construction & engineering

Direct calculator

Inputs

Results update when you click Calculate.

Tons

83.33

(space_size) * (climate) / 12

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Recently used

Tools you open will show up here on this device — with your last inputs when available.

What this result means

Free hvac calculator to estimate heating load. Instant results in your browser — no signup. Estimate heating load: (space_size) * (climate) / 12.

Assumptions

  • Rule dependency: Rule/assumption dependent.

How it works

Estimate heating load: (space_size) * (climate) / 12.

Example

Example: “heating BTU calculator”. Enter your values and click the button to get a result.

Frequently asked questions

What does this heating load calculator do?+

It helps you estimate heating load. Typical search: “heating BTU calculator”.

How should I read the result?+

Estimate heating load using space size; climate; insulation. Result: heating capacity.