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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)

Chemical Engineering

Sherwood Number Calculator

Compute the Sherwood number to quantify convective mass transfer relative to molecular diffusion. Use it when designing absorbers, membranes, or any system where species transport rates matter.

Mass Transfer Coefficient (m/s)

Characteristic Length (m)

Molecular Diffusivity (m²/s)

Key differences

	LMTD Heat Exchanger Calculator	Sherwood Number Calculator
Category	Chemical Engineering	Chemical Engineering
Inputs required	4	3
Result	LMTD (°C)	Sherwood Number
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.	Compute the Sherwood number to quantify convective mass transfer relative to molecular diffusion. Use it when designing absorbers, membranes, or any system where species transport rates matter.