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Both calculators run independently — change the inputs on either side to compare results.

LMTD Heat Exchanger Calculator

Compute the log mean temperature difference (LMTD) — the effective driving force for heat transfer in a heat exchanger, given the four end-of-fluid temperatures. The standard input to the design equation Q = U·A·LMTD for sizing or rating exchangers.

Hot Fluid Inlet Temperature (°C)

Hot Fluid Outlet Temperature (°C)

Cold Fluid Inlet Temperature (°C)

Cold Fluid Outlet Temperature (°C)

Fill in the required fields to see your result.

Chemical Engineering

Pump Head and Power Calculator

Calculate the shaft power required to drive a centrifugal pump given flow rate, static head, friction losses, and pump efficiency. Use this when sizing pumps for piping systems.

Flow Rate (L/min)

Static Head (m)

Friction Loss (m)

Fluid Density (kg/m³)

Pump Efficiency (%)

Fill in the required fields to see your result.

Key differences

	LMTD Heat Exchanger Calculator	Pump Head and Power Calculator
Category	Chemical Engineering	Chemical Engineering
Inputs required	4	5
Result	LMTD (°C)	Required Pump Power (W)
What it does	Compute the log mean temperature difference (LMTD) — the effective driving force for heat transfer in a heat exchanger, given the four end-of-fluid temperatures. The standard input to the design equation Q = U·A·LMTD for sizing or rating exchangers.	Calculate the shaft power required to drive a centrifugal pump given flow rate, static head, friction losses, and pump efficiency. Use this when sizing pumps for piping systems.