Industrial & Health Calculators
Free online calculators for manufacturing, electrical, conveyor and pneumatic engineering — plus BMI, calorie, body fat and fitness tools. Fast and accurate.
Browse calculators by discipline
Unit Conversion
Length, pressure, weight, power, temperature & flow conversions.
Conveyor Calculators
Belt speed, capacity, motor power, pulley RPM, gear ratio.
Electrical Calculators
kVA, kW, voltage drop, cable sizing, power factor.
Pneumatic & Compressor
CFM, receiver tank, compressor energy, pressure drop.
Manufacturing & Lean
OEE, ROI, efficiency, machine utilization, labor savings.
Health & Fitness
BMI, TDEE, BMR, body fat, macros, calories, heart rate & more.
Popular industrial calculators
Popular health calculators
Latest articles
How to Calculate Conveyor Capacity (t/h) — A Practical Guide
A simple, accurate method for estimating belt conveyor throughput, with the formula, an example, and common mistakes.
kW vs HP Explained — and How to Convert Between Them
Why kilowatts and horsepower are not interchangeable on spec sheets — and the exact conversion you need.
What is OEE? Overall Equipment Effectiveness Explained
OEE in plain English — the three factors, the math, and what 'world-class' really means on the shop floor.
Industrial & health calculations, made fast
IHCalc is a free toolkit for engineers, factory managers, maintenance teams, technicians and health-conscious users alike. Whether you're sizing a three-phase motor cable, checking a conveyor's throughput, or tracking your BMI and daily calorie needs, the formulas you need are one click away.
Our unit conversion tools cover the everyday workshop pairs — millimetres to inches, bar to psi, kilograms to pounds, Celsius to Fahrenheit, and kilowatts to horsepower — all with engineering-grade precision. Convert flow between Nm³/h and CFM for compressed-air work, or move between metric and imperial pressure for hydraulic schematics.
For conveyor systems, calculate belt speed from pulley diameter and motor RPM, throughput capacity in tonnes per hour using ISO 5048, drive motor power with a real efficiency factor, and gear-ratio matching for chain or belt drives.
On the electrical side, get accurate kVA-to-kW conversion using the actual power factor of your load, voltage-drop calculations for copper conductors in both single-phase and three-phase circuits, recommended cable cross-sections, and full-load currents for industrial motors.
Pneumatic and compressed-air calculators help you size receiver tanks, estimate CFM demand from tool counts and duty cycles, model pressure drop in distribution piping, and compute the annual electricity cost of a compressor — often the biggest utility line on a plant's bill.
The manufacturing and lean calculators tie it all together with OEE, line efficiency, machine utilization, capital-project ROI and labor-saving estimates for automation business cases.
Frequently asked questions
+Are these industrial calculators free?
Yes. Every calculator on IHCalc is free to use, with no signup required.
+Can I trust the engineering formulas?
We use standard textbook formulas (IEC, ASHRAE, ISO 5048 for conveyors, etc.) and show the formula on every page so you can verify it.
+Do the calculators work on mobile?
Yes — every page is fully responsive and works offline once loaded.
+Can I use the results in design documents?
Use them for screening and quick checks; always validate critical designs against authoritative engineering standards.
"Saved me hours on a conveyor sizing project. The capacity calc is dead-on."
"I use the voltage drop and cable sizing calculators every week. Clean UI."
"The OEE and compressor energy tools are exactly what I needed for our improvement program."