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Heat Exchanger LMTD Calculator

Calculates the Log Mean Temperature Difference (LMTD) for counter-flow or parallel-flow heat exchangers, then uses it to find the required heat transfer area or rate. Used in the design and rating of industrial heat exchangers.

Hot Fluid Inlet Temperature (°C)

Hot Fluid Outlet Temperature (°C)

Cold Fluid Inlet Temperature (°C)

Cold Fluid Outlet Temperature (°C)

Heat Exchanger Configuration

Fill in the required fields to see your result.

Thermodynamics

Heat Conduction Calculator

Calculate the steady-state heat transfer rate through a flat wall, cylindrical pipe, or spherical shell using Fourier's law. Used by engineers sizing insulation, heat exchangers, and building envelopes.

Thermal Conductivity (W/(m·K))

Temperature Difference (K)

Wall Thickness / Length (m)

Heat Transfer Area (m²)

Geometry Type

Fill in the required fields to see your result.

Key differences

	Heat Exchanger LMTD Calculator	Heat Conduction Calculator
Category	Thermodynamics	Thermodynamics
Inputs required	5	5
Result	Log Mean Temperature Difference (°C)	Heat Transfer Rate (W)
What it does	Calculates the Log Mean Temperature Difference (LMTD) for counter-flow or parallel-flow heat exchangers, then uses it to find the required heat transfer area or rate. Used in the design and rating of industrial heat exchangers.	Calculate the steady-state heat transfer rate through a flat wall, cylindrical pipe, or spherical shell using Fourier's law. Used by engineers sizing insulation, heat exchangers, and building envelopes.