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.

Trusted by 5,000+ users worldwide every single day.

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Liquid Thermal Expansion Relief Sizing

Sizing for Relief Valves protecting liquid-filled equipment from solar, ambient, or fire heat inputs. Based on API 520/521.

Get started with our most frequently used tools.

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

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

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

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

Explore tools across all chemical engineering disciplines.

A resource built for the modern engineer.

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

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

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

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