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 June 2026

Centrifugal Pump Sizing Calculator

Advanced Engineering Calculator for System Curve Intersection, NPSHa, Rigorous Friction Losses, Affinity Laws, and API 610 Datasheet Generation.

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.

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

From Our Knowledge Base

Learn the theory and principles behind the calculations.

Mixing Mitigating Heat Exchanger Tube Rupture
June 19, 2026 18 min read
Mastering Agitator Design and Impeller Selection

A comprehensive engineering guide to evaluating flow patterns, solid suspension criteria, mechanical shaft sizing, and scaling parameters for industrial mixing processes.

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Properties Mastering Solvent Selection and Property Calculations
May 21, 2026 14 min read
Mastering Solvent Selection and Property Calculations

A comprehensive engineering guide to evaluating thermodynamic properties, utilizing Hansen Solubility Parameters (HSP), and determining safety criteria for process design.

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Equipment Pressure Vessel Design: Thickness, MAWP & Hydrotest Calculations
May 13, 2026 15 min read
Pressure Vessel Design: Thickness, MAWP & Hydrotest Calculations

A comprehensive step-by-step engineering guide to calculating required wall thickness, Maximum Allowable Working Pressure (MAWP), and hydrotest pressure in accordance with ASME BPVC Section VIII Division 1.

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