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.
Tank Design & Emission Loss Calculator
Shell sizing per ASME Section VIII, self-supporting cone/dome roof & flat bottom sizing per API 650, plus fixed-roof and floating-roof evaporation loss estimation per EPA AP-42 Chapter 7.1
Added in the past 3 months
Popular Calculators
Get started with our most frequently used tools.
Browse by Category
Explore tools across all chemical engineering disciplines.
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.
From Our Knowledge Base
Learn the theory and principles behind the calculations.
Centrifugal Pump Sizing and Selection: A Complete Engineering Guide
A complete engineering guide to Total Dynamic Head (TDH), NPSH and cavitation — including HI 9.6.1 hydrocarbon derating — affinity laws, viscosity effects, and power sizing for centrifugal pumps in industrial fluid transfer systems.
Read Article
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.
Read Article
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.
Read ArticleNeed a Custom Enterprise Solution?
Beyond our standard tools, we develop proprietary, secure calculators tailored to your plant's specific processes.