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factorycalc.io is a free collection of lean manufacturing and industrial engineering calculators. No sign-up. No paywalls. Just fast, accurate tools that work.
Manufacturing engineers spend too much time rebuilding the same spreadsheets over and over. We built factorycalc.io to fix that — a growing library of browser-based calculators covering takt time, OEE, cycle time, line balancing, and more.
Every tool is purpose-built for production environments. Enter your numbers, get your answer instantly, and move on. No accounts, no data stored, no nonsense.
All calculations run in your browser. No server round-trips, no waiting.
Formulas follow lean manufacturing standards and APICS definitions.
Every tool is free to use. We're supported by non-intrusive advertising.
We're continuously adding new calculators. Here's what's available today:
factorycalc.io is free because it's supported by advertising. We show a small number of relevant, non-intrusive ads from the Google AdSense network. We do not sell your data, require an account, or place any content behind a paywall.
If you'd like to advertise directly or sponsor a tool, reach out at factorycalcio@gmail.com.
Have a suggestion for a new calculator, found a bug, or want to partner with us?
factorycalcio@gmail.com