Heat Exchanger LMTD Calculator
Calculate log-mean temperature difference and heat transfer rate for parallel and counter-flow heat exchangers
Heat Exchanger LMTD Calculator
Calculate log-mean temperature difference and heat transfer rate for parallel and counter-flow heat exchangers.
Formula
Results
ΔT₁
80.00 K
ΔT₂
70.00 K
LMTD
74.889 K
Effective LMTD (F·LMTD)
74.889 K
Heat Transfer Rate Q
74888.8 W
= 74.889 kW
Typical U Values (W/m²·K)
How to Use This Calculator
Enter your input values
Fill in all required input fields for the Heat Exchanger LMTD Calculator. Most fields include unit selectors so you can work in your preferred unit system.
Review your inputs
Double-check that all values are correct and that you have selected the right units for each field. Incorrect units are the most common source of calculation errors.
Read the results
The Heat Exchanger LMTD Calculator instantly computes the output and displays results with units. All calculations happen in your browser — no loading time and no data sent to a server.
Formula Reference
Heat Exchanger LMTD Calculator Formula
See calculator inputs for the governing equation
Variables: All variables and their units are labeled in the calculator interface above.
When to Use This Calculator
- •Use the Heat Exchanger LMTD Calculator when solving homework or exam problems that require quick numerical verification of your hand calculations.
- •Use it during the design phase to rapidly iterate on parameters before running detailed finite element simulations.
- •Use it when reviewing a colleague's calculation or checking a vendor's data sheet for plausibility.
- •Use it to generate reference data for a technical report or presentation without manual computation.
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