chemical engineering Calculators
Last updated: May 2026
Reynolds Number Calculator
Compute the Reynolds number Re = ρvD/μ — the dimensionless ratio of inertial to viscous forces in a flowing fluid.
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.
Fenske Equation Calculator
Compute the minimum number of theoretical equilibrium stages required for a binary distillation separation using the Fenske equation.
Pipe Pressure Drop Calculator
Compute the friction term f·(L/D)·(v²/2) from the Darcy-Weisbach equation — the specific energy loss per unit mass of fluid flowing through a straight pipe.
Arrhenius Equation Calculator
Compute a chemical reaction rate constant from the Arrhenius equation k = A · exp(−Eₐ/(R·T)).
Sherwood Number Calculator
Compute the Sherwood number to quantify convective mass transfer relative to molecular diffusion.
Compressibility Factor Calculator
Estimate the compressibility factor Z of a real gas using reduced pressure, reduced temperature, and the acentric factor.
Bubble Point Pressure Calculator
Calculate the bubble point pressure of a binary liquid mixture using Raoult's Law.
Crystallizer Yield Calculator
Estimate the mass of crystals recovered from a solution based on initial concentration, final solubility, and solution volume.
Pump Power Calculator
Calculate the shaft power required to pump a fluid against a given head, accounting for flow rate, fluid density, and pump efficiency.
Distillation Column Theoretical Stages Calculator
Determine the number of theoretical trays needed to separate a binary mixture using the Fenske equation.
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.
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.
Pipe Pressure Drop Calculator
Compute pressure drop across a straight pipe section using the Darcy-Weisbach equation.
Gas Compressibility Factor Calculator
Calculate the real-gas compressibility factor Z from reduced temperature and pressure using the Pitzer correlation.
Crystallization Yield Calculator
Estimate how many grams of crystals you can recover when cooling or evaporating a solution.
Mass Transfer Coefficient Calculator
Compute the convective mass transfer coefficient (k) for packed columns, bubble columns, or stirred reactors using dimensionless Reynolds and Schmidt number correlations.
Absorption Column Height Calculator
Determine the packed height of a gas absorption column needed to reduce a contaminant from a known inlet concentration to a target outlet concentration.
Evaporator Heat Balance Calculator
Calculate the steam consumption rate (kg/h) for a single-effect evaporator concentrating a dilute feed to a target product concentration.
Distillation Column Theoretical Plates Calculator
Estimates the minimum number of theoretical plates needed to separate a binary mixture by distillation.
CSTR Reactor Design Calculator
Calculates the residence time and required reactor volume for a Continuous Stirred Tank Reactor (CSTR) given reaction order, flow rate, and conversion.
Centrifugal Pump Sizing Calculator
Calculate the shaft power required to drive a centrifugal pump given flow rate, total head, and combined pump and motor efficiency.
Pipe Flow Pressure Drop Calculator
Compute pressure drop along a straight pipe section using the Darcy-Weisbach equation, with automatic friction factor selection for laminar or turbulent flow.
Absorption Column Height Calculator
Determine the required packed bed height for a gas absorption column using mass transfer coefficients and equilibrium data.
Crystallization Yield Calculator
Estimate theoretical crystallization yield when cooling a saturated solution from a hot to a cold temperature, based on solubility difference.
Fluidized Bed Minimum Velocity Calculator
Determines the minimum fluidization velocity for particles in a fluid bed reactor.
Multiple Effect Evaporator Calculator
Calculates the steam consumption per effect and total water evaporated in a multiple-effect evaporator system.
Membrane Separation Flux Calculator
Computes the required membrane area for reverse osmosis or ultrafiltration systems given flow rate, recovery, and pressure conditions.
McCabe-Thiele Method Calculator
Estimates the number of theoretical trays needed to separate a binary mixture by distillation given compositions, reflux ratio, and relative volatility.
Pump NPSH Calculator
Calculates the Net Positive Suction Head available (NPSHa) for a centrifugal pump installation to verify cavitation will not occur.
Absorption Column Height Calculator
Determines the required packed bed height for a gas absorption column based on gas flow rate, inlet/outlet concentrations, and mass transfer coefficient.
Crystallizer Yield Calculator
Estimates the mass of crystals obtained from a cooling crystallization process given initial concentration, temperature drop, and solubility data.
Compressor Power Calculator
Calculates the shaft power needed to compress a gas from a given inlet pressure to a target outlet pressure using isentropic or polytropic compression theory.
Evaporator Steam Economy Calculator
Estimates the steam economy of a multi-effect evaporation system — the kilograms of water evaporated per kilogram of steam consumed.
Heat Exchanger Effectiveness Calculator
Computes heat exchanger thermal effectiveness (ε) using the NTU-effectiveness method for parallel-flow, counter-flow, and cross-flow configurations.
Centrifugal Pump Sizing and Power Calculator
Determine the brake horsepower required to drive a centrifugal pump given flow rate, total head, and fluid properties.
Cooling Tower Performance Calculator
Evaluate a cooling tower's thermal effectiveness by comparing its actual temperature reduction to the maximum thermodynamically possible.
Vapor Pressure Calculator (Antoine Equation)
Calculate the vapor pressure of common chemicals at a given temperature using the Antoine equation and built-in constants for water, benzene, toluene, and ethanol.
Gas Absorption Column Design Calculator
Design a packed gas absorption column by calculating the number of overall gas-phase transfer units (NOG) and total column height needed to achieve a target gas-phase separation.
Chemical Reactor Residence Time Calculator
Calculate the exit concentration and conversion for a CSTR or PFR reactor with first-order kinetics given reactor volume, flow rate, and rate constant.
Centrifugal Pump Sizing and NPSH Calculator
Size centrifugal pumps by calculating shaft power and net positive suction head (NPSH).
Pipeline Pressure Drop Calculator
Calculate frictional pressure drop in pipelines using the Darcy-Weisbach equation.
Adsorption Isotherm Calculator
Compute equilibrium adsorption capacity using Langmuir or Freundlich isotherm models.