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Basic Heat Flow
Estimate heat flow through a single layer with manual inputs.
Calculator tabs
Inputs
Enter conductivity, area, temperature difference, and thickness.
Results
Heat flow and thermal resistance based on your inputs.
Step 1
Check the inputs and units.
Step 2
Formula
Q = k * A * dT / L
- R = L / (k * A) = 0.0100 / (45.0000 * 0.0200) = 0.0111 K/W
- Q = dT / R = 30.0000 / 0.0111 = 2700.0000 W
Step 3
Heat flow Q
2,700.0000 W
Estimated heat flow through the layer.
Thermal resistance R
0.0111 K/W
Resistance of the layer to heat transfer.
Explanation Mode (advanced)
Formulas used
Q = k * A * dT / L
R = L / (k * A)
Variables
- Q
- Heat flow rate (W).
- k
- Thermal conductivity (W/mK).
- A
- Area (m2).
- dT
- Temperature difference (K).
- L
- Thickness (m).
- R
- Thermal resistance (K/W).
Usage notes
- Assumes steady-state, 1D conduction.
- Units are SI (W, m, K).
Show reports, charts, and comparison tools
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