Air Conditioner BTU Calculator
Estimate cooling capacity from room area and BTU per square foot.
Inputs
Air Conditioner BTU Calculator
Results update as you type.
Live result
Required BTU
6,250
Cooling tons
0.52
Scenario compare
Save scenario A, change a few inputs, then save scenario B.
Scenario A
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Scenario B
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Quick check
Change one or two inputs to compare a second scenario before using the number.
Need more detail?
Formula, examples, and FAQ stay tucked away until you need them.
FXFormula ExplanationThe core logic behind the numbers on this page.+
This calculator estimates the total cooling capacity required by using the room area and BTU per square foot. The formula assumes a standard BTU per square foot rate, but this rate can vary depending on location, provider, and date. You can adjust the editable rate and rule fields to match your specific situation.
USEHow to UseA short path from input to result.+
- Enter the requested inputs.
- Keep any editable rule or rate fields aligned with your situation.
- Review the result and notes before using the estimate.
EXExamplesReference scenarios to sanity-check your inputs.+
Adjust the defaults to match your scenario, then calculate the estimate.
FAQFAQCommon edge cases and quick clarifications.+
What is the purpose of this calculator?
This calculator helps you estimate the cooling capacity you need for your home or office based on the room area and BTU per square foot.
Can I change the assumptions?
Yes, you can adjust the editable rate and rule fields to match your specific situation.
Is this calculator accurate?
This calculator provides an estimate and should be checked against official or current rules when making decisions that involve money, health, or legal implications.
How do I use this calculator?
Enter the room area and BTU per square foot, then review the result and notes before using the estimate.
What is the formula used in this calculator?
The formula is based on the room area and BTU per square foot, assuming a standard rate that can vary depending on location, provider, and date.