Psychrometric Chart
Plot air states on an interactive chart in SI or IP units, at any altitude, and export it as an image or an Excel file.
Free Engineering Tools
Everyday Calculations, Free in Your Browser
Small tools we built for our own work and keep free for every engineer. Nothing to install, no sign-up, and your numbers stay in your browser.
Mixed Air Calculator
Mix two or more air streams by their flows and get the mixed air temperature, humidity and enthalpy, with a condensation check.
Unit Converter
Convert between metric and imperial units in 19 categories, from pressure and flow to energy and viscosity.
Curve Digitizer
Turn a pump or fan curve from a catalog page or screenshot into data points.
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Tell us what you calculate by hand or in spreadsheets. We may build it as a free tool, or as part of software made for you.
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