multicalci.com was created with one mission — to give every engineer on the planet free, reliable, standards-based calculation tools.
Engineers spend valuable time searching for reliable calculation tools — only to find outdated spreadsheets, paywalled software, or tools that don't follow recognised standards. We've been there.
multicalci.com was built to solve exactly that problem. Every calculator implements recognised international engineering standards — ISO, IEC, ASME, TEMA, API, and more — and runs entirely in your browser with no login, no subscription, and no data collection.
To help fellow engineers perform quick, reliable, standards-compliant calculations — freely and openly. Engineering knowledge should be accessible to every engineer, whether they're working in a major plant or a small consultancy, in India or anywhere in the world.
Every tool on this platform is and will always remain free. No paywalls, no premium tiers, no subscriptions.
Every calculation implements recognised international codes — ISO, IEC, ASME, TEMA, API and more.
All calculations run in your browser. Nothing you enter is ever sent to our servers or stored anywhere.
Full support for both SI (metric) and US Customary (Imperial) unit systems across all tools.
Once loaded, calculators run without internet — perfect for site work and field conditions.
Tools are actively maintained. Bugs are fixed quickly. New calculators are added regularly.
Our calculators implement full published engineering standards — not rough approximations:
multicalci.com covers seven core engineering disciplines, with tools used across oil & gas, power generation, water treatment, HVAC, pharmaceuticals, manufacturing, and construction:
Pipe pressure drop, flow measurement, pumps, NPSH, valves, compressors, head calculations
Heat exchangers, steam tables, psychrometrics, cooling towers, Rankine cycle
Separator sizing, material of construction, grades library, water treatment
Structural, geotechnical, hydraulics, earthwork, surveying
Power, cable sizing, motors, transformers, circuit analysis
Signal conversion, loop analysis, thermowell design, DP flow
Machine design, power transmission, fabrication, tank volumes
multicalci.com calculators are designed for preliminary engineering, feasibility studies, educational use, and cross-checking. All results must be independently verified by a qualified registered engineer against applicable codes and project-specific conditions before use in final designs, construction, or safety-critical applications.
We make every effort to ensure accuracy, but we accept no liability for errors or omissions in calculation results.
25+ free engineering calculators. No login. No subscription. Just results.
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