Free engineering calculators — built for licensed PEs.
Every calculation prints with a built-in PE stamp + signature block, ready for sealed submittals. Every tool shows the formula being applied, names every variable, cites a source, and supports both Imperial and SI units. Organized by PE discipline. No login, no paywall. Built for working Professional Engineers, not for FE prep.
Free reference cards
Single-page printable cheat sheets for values engineers look up over and over.
Worked examples
Long-form design walkthroughs that thread multiple PE-Calc tools end-to-end on real-world problems.
Why another engineering calculator site?
Most existing options bury the math behind ads, leave you guessing what coefficients they're using, or were built for an undergraduate thermodynamics class twenty years ago and never updated. Every PE-Calc tool shows the formula, names every variable, cites a reference, and lets you hand-check the result. The calculators run entirely in your browser — nothing leaves your machine. Both Imperial and SI units on every relevant tool, because real engineering happens in both.
Built for sealed submittals
Every tool's print layout includes a designated PE stamp area, signature line, license number, state, date, and project / sheet field — formatted to slot into a sealed engineering submittal. Hit "Print with PE stamp box" on any tool and you get a clean letter-size calculation sheet with the math, the inputs, the result, the cited reference, and a stamp block ready for your seal and signature. Other calculator sites print a screenshot of an ad-cluttered web page; PE-Calc prints engineering documentation.
What's coming next
New tools are added every week. The disciplines marked "in development" above will populate over coming months. Have a calculator you'd like to see prioritized? Subscribe to the newsletter below and reply to any issue — tool requests are welcome.