ENGINEERING, WITHOUT THE SPREADSHEET CHAOS
Design with clarity.
Calculate with confidence.
Six mechanical engineering calculators with transparent formulas, explicit units, browser-saved projects and printable calculation reports.
Start calculating →6 free toolsNo account requiredLocal-first projects
THE TOOLKIT
Choose a calculation
ACTIVE CALCULATOR
FREEEQUATION
Educational design aid only. Check units, assumptions, loading, material behavior, standards and safety factors independently before any real-world design. Not a certified engineering analysis.
YOUR WORKSPACE
Saved calculations
Stored only in this browser. Export a backup before clearing browser data or switching devices.
BUILT FOR LEARNING
Know what the numbers mean.
EngineerOS makes calculation assumptions visible instead of hiding them behind a result. The current release is a free, browser-based educational toolkit. Paid subscriptions, cloud sync and advertising are not enabled.