Heat Sink Sizing Calculator is a useful tool for Electrical, Electronics, and Telecom Engineering enthusiasts. Use the heat sink sizing calculator to estimate the volume of the heat sink.
Heat Sink Sizing Formula
V= (Q*Rv)/ΔT
Where
- V = Estimated Heat Sink Volume in cm3
- Q = Heat Source Power in watts
- Rv = Volumetric Thermal Resistance
- ΔT = Delta – T (Thermal Budget) = Tcase Max – Max Ambient Temperature °C
Volumetric Thermal Resistance Guide
| Volumetric Thermal Resistance (Rv) | Air Flow | Properties |
|---|---|---|
| 50 – 80 | 5.0 m/s ~1000 lfm | Fast, Loud air |
| 80-150 | 2.5 m/s ~500 lfm | Moderate air |
| 150-250 | 1.0 m/s ~200 lfm | Gentle air, Very low noise |
| 500-800 | Natural Convection | Little to no air/No Noise |
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