Fin Efficiency Calculator

Compute fin efficiency, effectiveness, heat rate, and temperature decay from geometry, h, and k.

visual calculatorHeat Transfer

Read the flow shape before trusting the number.

This page turns a CFD setup into regime, scale, and dominant-effect cues. Adjust the calculator below and compare the moving graphic with the computed result.

input scale

model

check

fin efficiencyheat sinkconjugate heat transferthermal

formula

KaTeX rendered

\begin{aligned}\text{m = sqrt(h P/(k A\_c))}\\[0.35em]\text{eta\_f = tanh(m L)/(m L)}\end{aligned}

ASCII source

m = sqrt(h P/(k A_c)), eta_f = tanh(m L)/(m L)

h (W/m2/K)fin k (W/m/K)perimeter P (m)cross area A_c (m2)fin length (m)base DeltaT (K)

m L

0.467

fin efficiency

0.9330

effectiveness

14.928

Q_fin (W)

12.540

m (1/m)

5.843

Use for quick conjugate heat-transfer sanity checks where thin fins or heat-sink ribs appear in the geometry.

fin efficiency heat sink conjugate heat transfer thermal