
Amni-Calc
Calculatoredge
MachineCalcs
MechanixCalc
Interactive mechanical engineering calculators with derivations — bearings, gears, pumps, welding, FEA, HVAC, piping, thermodynamics and more, plus a 1,114-material property database and worked examples for every calculation.
Machinist Toolbox
CalcSteel
MachineCalcs
Maker Calc
Complete offline metal and machinist toolbox for weight, units, fractions, threads, tap drills, materials, job records, and professional exports.

Which is more popular?
Website, pricing, platforms and company facts side by side.
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WC
Workshop Calc
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| Website | mechcodex.com | yunfanlabs.com |
| Pricing | — | |
| Platforms | — | |
| Company | Startup from Canada · 1 - 9 employees | — |
| Listed in |
In their own words, as submitted to SaaSHub.

MechCodex is an online toolkit of interactive mechanical engineering calculators covering machine design, strength of materials, fluid mechanics, heat transfer, thermodynamics, manufacturing and HVAC. Every calculator shows its governing equations and a worked example, in both SI and Imperial...
No description of Workshop Calc yet.
What each product offers, as listed by its team.

Possible disadvantages
How often each product is chosen within a category, 0–100% relative to the other.

As answered by people managing MechCodex and Workshop Calc.
MechCodex's answer
Because the answer comes with proof. Every calculation shows its derivation and cites the governing standard, in SI and Imperial side by side. It's the difference between getting a number and understanding it — free, no account needed.
MechCodex's answer
Working mechanical engineers who need a fast, verifiable answer on the job, and engineering students who want to see the derivation behind the formula — not just the final number.
MechCodex's answer
A modern web stack: Next.js and React on the frontend, with KaTeX for rendering math and a Postgres-backed database for the materials property lookups.
MechCodex's answer
MechCodex's answer
MechCodex started in December 2025 — "The Engineer's Toolkit" — built by a working mechanical engineer who wanted a calculator that shows its work: every result backed by the governing equations and a worked example, free for everyone.
MechCodex's answer
Two things: every calculator shows the complete derivation — equations, steps, worked example — so you verify instead of trust. And the calculators sit next to a searchable materials property database and standards references, so the data you need is already there. All free, no signup.
Share your experience with using MechCodex and Workshop Calc. For example, how are they different and which one is better?
When comparing MechCodex and Workshop Calc, you can also consider the following products.

Amni-Calc — free WASM engineering modules for bolted joints, stress analysis, beams, and related mechanical checks. Theory + calculator on the same page; data never leaves the browser. Open modules at amni-scient.com/calc/ (e.g. bolts, stress, beam).
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Model, detail and generate drawings for steel structures directly in your browser. 3D editor, automatic sheets, PDF export.
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well maintained engineering calculators that show the formula and standard behind every result. Springs, gears, GD&T, machining and more. Metric & imperial.
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Standards-based mechanical-engineering calculators (ISO, ASME, EN, DIN, VDI) — gears, bearings, shafts, bolts, welds, pressure vessels and more, each with the governing standard, a worked example and a shareable PDF report.
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