CFM to BTU Calculator
Heat carried by an airstream.
Enter your values
ⓘ Live results
Results
- Sensible heat
- 25,920 BTU/h
- In tons
- 2.16
- In kW
- 7.6
- Per CFM
- 21.6 BTU/h
Working
- 11.08 x 1,200 x 20 = 25,920 BTU/h
Quick answer
Sensible heat in BTU/h equals 1.08 multiplied by CFM and the temperature difference in °F.
BTU/h = 1.08 x CFM x ΔT
How to use the CFM to BTU Calculator
- 1Enter the airflow in CFM.
- 2Enter the supply-to-return temperature difference.
- 3Convert to tons or kW to compare with equipment ratings.
Worked example
Using the values the calculator loads with:
Inputs
- Airflow1200 CFM
- Temperature difference20 °F
Results
- Sensible heat25,920 BTU/h
- In tons2.16
- In kW7.6
- Per CFM21.6 BTU/h
- 1.08 x 1,200 x 20 = 25,920 BTU/h
Frequently asked questions
Why is my measured capacity lower?
Duct losses, leaks and low airflow all cut delivered capacity below the nameplate figure.
Does humidity affect this?
This is the sensible portion only; moisture removal adds latent capacity on top.
About this calculator
- Built and reviewed by James Whitfield · How we build and test calculators
- Report an error
Results are estimates for general information. For medical, legal, structural or financial decisions, confirm with a qualified professional.