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Free heat transfer calculator using Fourier's law of conduction. Estimate heat-transfer rate, heat flux, and total thermal energy transferred for engineering and physics applications.
Last updated: April 20, 2026
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Heat-transfer rate
720.000 W
Total energy transferred
86400.000 J
Heat flux
360.000 W/m²
Interpretation
Estimated conduction heat-transfer rate is 720.000 W with total transferred energy 86400.000 J over 120.00 s.
Model assumptions:
One-dimensional steady conduction with constant material properties and negligible internal heat generation.
Formula
Qdot = kA DeltaT / L
Output
q" in W/m²
Equation
E = Qdot × t
k=0.6, A=2.0, DeltaT=30, L=0.05, t=120 s
Heat-transfer rate
720.00 W
Total energy
86400.00 J
The calculator applies one-dimensional steady-state Fourier conduction. Heat-transfer rate scales with conductivity, area, and temperature difference, and decreases with increased wall thickness.
Qdot = kA DeltaT / Lq" = Qdot / AE = Qdot × tUnits are SI-based: conductivity in W/m·K, area in m², thickness in m, and power in watts.
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