Compare calculators

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

Chemical Reactor Conversion Calculator

Calculate the required volume of a continuous stirred-tank reactor (CSTR) to achieve a target conversion for first- or second-order reactions. Essential for chemical process design and scale-up.

Initial Reactant Concentration (mol/L)

Reaction Rate Constant (L/mol·s)

Volumetric Flow Rate (L/min)

Desired Conversion (%)

Reaction Order

Fill in the required fields to see your result.

Chemical Engineering

Heat Exchanger Effectiveness Calculator

Computes heat exchanger thermal effectiveness (ε) using the NTU-effectiveness method for parallel-flow, counter-flow, and cross-flow configurations. Used by engineers to evaluate or size heat exchangers without knowing outlet temperatures.

Number of Transfer Units (NTU)

Capacity Rate Ratio (Cmin/Cmax)

Flow Configuration

Fill in the required fields to see your result.

Key differences

	Chemical Reactor Conversion Calculator	Heat Exchanger Effectiveness Calculator
Category	Chemical Engineering	Chemical Engineering
Inputs required	5	3
Result	Required Reactor Volume (L)	Heat Exchanger Effectiveness
What it does	Calculate the required volume of a continuous stirred-tank reactor (CSTR) to achieve a target conversion for first- or second-order reactions. Essential for chemical process design and scale-up.	Computes heat exchanger thermal effectiveness (ε) using the NTU-effectiveness method for parallel-flow, counter-flow, and cross-flow configurations. Used by engineers to evaluate or size heat exchangers without knowing outlet temperatures.