The Engineer's Toolkit

Fast & Accurate Chemical Engineering Calculations

Your go-to resource for reliable online calculators, for all your essential process and plant design needs. Built by engineers, for engineers.

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NEW Just Launched • April 2026

Tube Rupture Relief Valve Sizing

Sizing for Relief Valves protecting low-pressure shell sides from high-pressure tube ruptures. Supports Liquid and Gas/Vapor phases based on API 520/521.

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Popular Calculators

Get started with our most frequently used tools.

Vessel Volume & Level Calculation

Calculate partial volumes and levels for various vessel shapes and head types.

Insulation Heat Loss

Determine heat loss from a bare and insulated pipe along with surface temperature.

Pump Sizing

Estimate hydraulic power, brake horsepower, and NPSH for centrifugal pumps.

Natural Gas Pipeline Sizing

Size pipelines for natural gas flow based on Gas flowrate and pressure.

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Explore tools across all chemical engineering disciplines.

Fluid Flow

Heat Transfer

Instrument

Properties

Distillation

Mixing

Vapor Liquid Equilibria

Equipment

Others

Why CheCalc?

A resource built for the modern engineer.

Accurate & Reliable

Based on established literature and developed by experienced chemical engineers to ensure reliable results every time.

Modern & Accessible

A clean, responsive interface that works flawlessly on any device, from your office desktop to the plant floor mobile.

Community Resource

Built for the community. Our core tools remain openly available for students, researchers, and professionals alike.

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Beyond our standard tools, we develop proprietary, secure calculators tailored to your plant's specific processes.

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