The standards-based mechanical engineering calculator suite we built
Beyond client engineering, Mechanixer develops and operates MechanixCalc — a professional web-based calculation platform for mechanical engineers. 50 calculators across 9 domains, each citing its governing standard, with a worked example and a shareable, branded PDF report.
The bridge between a free single-answer calculator and a $10k desktop seat
Everyday mechanical calculations sit in an awkward gap. Free online calculators are simplified estimates you can't put in a design file. Professional desktop software is expensive and install-bound. MechanixCalc runs the actual standards in your browser, shows the method, and gives you a report a reviewer can follow.
Standards-grade, not estimates
Every tool cites its governing standard — ISO 6336, ISO 281, VDI 2230, DIN 743, ASME VIII, EN 1993-1-8, B31.3 and more — and shows the formula behind the result.
Reviewable & shareable
Export a branded PDF report with inputs, method, and results a checker can follow, or send a read-only share link. Built for design files and quoting.
In the browser, no install
Full suite runs on any device. A free 30-minute preview needs no signup, and a 14-day trial needs no credit card.
50 calculators across 9 engineering domains
Power Transmission
Gears (ISO 6336), bevel & planetary, belts, chains, couplings, clutches
Shafts & Bearings
Shaft design (DIN 743), rolling bearings (ISO 281), keys, press fits, ballscrews
Structural & Strength
Beams, buckling, welds (EN 1993-1-8), bolted joints (VDI 2230), Mohr's circle
Fatigue & Durability
Stress-life, notch effects, variable amplitude, low-cycle fatigue
Pressure & Piping
Pressure vessels (ASME VIII), pipe flow, pipe stress (B31.3), heat exchangers
Fluid Power
Hydraulic cylinders, accumulators, pneumatics, pumps, valves
Motion & Dynamics
Vibration, flywheels, cams, mechanisms, conveyors, linear guides
Motors & Drives
Motor sizing, VFD, thermal, drive-train reflection, lubrication
Manufacturing
Machining, sheet metal, springs, wire rope, GD&T, tolerance stack-up
More than a calculator — a working platform
Design Studio
Three schematic editors — fluid-power, P&ID, and electrical — for building and documenting system diagrams alongside the math.
AI Engineering Assistant
An in-tool assistant that helps interpret inputs, explain methods, and check your approach against the governing standard.
REST API
Self-serve API keys for pulling standards-grade calculations directly into your own tools, scripts, and workflows.
CAD Add-in
A Fusion 360 copilot add-in (early access), with Inventor and SolidWorks to follow — calculations where you design.
Simple, transparent pricing
Start free with the reference tools, or try the full suite for 14 days — no credit card required.
Structural references & GD&T
Every engineering calculator
Calculators + Design Studio
API access & professional scale
Annual billing available at a lower monthly rate. See full pricing on MechanixCalc.com.
Try MechanixCalc free
Open any tool for 30 minutes with no signup, or start a 14-day trial with no credit card. Built and maintained by the Mechanixer engineering team.