Free Engineering
Calculators
Eleven precision tools for process design, hydraulics, pressure integrity, relief sizing and material estimation – organised into three specialist hubs so you reach the right calculator in seconds.
Three specialist hubs
Each hub bundles the calculators for one discipline, so you go straight to the right tool. Pick a hub, or jump to any calculator below.
FlowStack
From fluid properties to delivered head: vapour pressure and density, pipe sizing and pressure drop, then pump duty and NPSH margin.
IntegriShield
Design office to site: ASME VIII thickness and MAWP, volume and calibration, API 520/521 relief sizing, and field construction safety.
MechCore
The mechanical backbone: insulation and economic thickness with NPV/IRR, steam and HVAC, metal-profile weights, plus offline documentation.
All 11 calculators
Every tool runs free in your browser. Jump straight to the one you need.
Advanced Process & Thermodynamic Suite
Estimate vapour pressure, saturated-liquid density and hydraulic behaviour from established correlations – built for rapid process screening.
Open calculatorSolvent Property & Sizing Calculator
Calculate physical properties of common solvents with density correction and NFPA 704 classification for process design, sizing and safety.
Open calculatorFluid Flow & Pipe Sizing Calculator
Size pipes and estimate pressure drop for liquids, gases and two-phase flow, with fitting losses and a built-in standard pipe database.
Open calculatorPump Sizing Calculator
Calculate total dynamic head, hydraulic and shaft power, and NPSH margin to select the right pump and protect against cavitation.
Open calculatorASME VIII Pressure Vessel Calculator
Screen shell and head thickness, MAWP and vessel geometry against ASME Section VIII design rules for vessel checks and code reviews.
Open calculatorVessel Volume & Calibration Calculator
Total and partial volumes for tanks and vessels across geometries and head types – ideal for gauging, inventory and capacity verification.
Open calculatorTube Rupture Relief Valve Suite
Size pressure safety valves and evaluate tube-rupture and other overpressure scenarios following API 520 and API 521 methodology.
Open calculatorField Safety & Construction Utility Suite
A field-oriented toolkit for construction and safety tasks across oil and gas, EPC and refinery projects – built for offline site use.
Open calculatorMechanical & Energy Utility Suite
Pipe insulation and economic-thickness analysis with NPV and IRR, steam and HVAC utilities, plus GHG Protocol Scope 1, 2 and 3 accounting.
Open calculatorMetal Profiles Weight Calculator
Estimate the weight of bars, plates, sheets, pipes and structural profiles across common materials – perfect for take-offs and procurement.
Open calculatorEngineering Documentation Software
An offline-capable platform for creating, organising and controlling engineering documentation, with persistent local storage for deliverables and records – the place your calculations become controlled, auditable output.
Open calculatorBuilt to be trusted
Standards-based
Built around recognised methods – from ASME Section VIII to API 520/521 and published correlations – so your numbers rest on a trusted foundation, with no copyrighted code tables reproduced.
Instant & offline
Everything runs in your browser with instant results and no downloads. Open a calculator, enter your values, and keep working even without an internet connection.
Built for engineers
Designed for process, mechanical and chemical engineers, designers and students who need a reliable resource for everyday calculations. Bookmark this hub.
Start calculating – free, no signup
Pick the hub that matches your discipline and open any of the eleven tools instantly in your browser.
