Technology & Computing
TDP Heat Dissipation & Required Airflow (CFM) Calculator
Estimate required airflow (CFM) to dissipate heat from components based on total TDP and allowed temperature rise.
Your inputs
Change any value to update the result instantly.
Required airflow
94.8 CFM
Base airflow requirement
79 CFM
Heat output
1,706 BTU/hr
Total TDP
500 W
Temperature rise allowed
20 °F
This estimates bulk airflow needed; actual cooling also depends on airflow path, altitude and fan static pressure.
Formula and working
CFM = (Watts × 3.16) ÷ ΔT(°F); 1 Watt ≈ 3.412 BTU/hr
- 1
Collect the inputs
Total component TDP (watts) = 500 W; Allowed temperature rise (°F) = 20 °F; Safety margin = 20 %
- 2
Apply the formula
CFM = (Watts × 3.16) ÷ ΔT(°F); 1 Watt ≈ 3.412 BTU/hr
- 3
Result
Required airflow = 94.8 CFM
Frequently asked questions
Important limitation
This is an educational estimate based only on the values and formula shown. Verify current rates, rules, units, and professional standards before relying on the result. It is not personalized financial or investment advice.
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