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CalcForge

Free open-source calculators for civil, mechanical and electrical work

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What CalcForge is

A free, open-source station of engineering calculators. Structural, geotechnical, tunnel and construction calculators sit together, along with engineering datasets and a Python collaboration entry point.

It is built for quick checks, scheme comparison and learning rather than formal design sign-off.

What you can do with it

  • Run beam, 2D frame, 3D structural and truss calculations
  • Estimate bearing capacity, pile length, slope stability and retaining walls
  • Work through tunnel settlement, mining tunnel and pipe jacking cases
  • Estimate tunnel and formwork or scaffold costs
  • Pull example datasets instead of building scripts from scratch

Who it is for

  • Civil, mechanical and electrical engineers
  • AEC students and learners
  • Teams wanting a fast sanity check on a number

What to watch out for

  • Engineering results depend on codes, load assumptions and local regulations
  • Use it for learning, estimates and scheme discussion; formal construction drawings, bearing capacity decisions and contractual judgements need a qualified engineer
  • Check which calculators are mature, since coverage varies

Pros & cons

✓ What we like

  • Free and open source
  • Broad coverage across engineering disciplines
  • Useful for quick checks and learning
  • Datasets and Python support

! What to watch out for

  • Not a substitute for formal design review
  • Assumptions and code compliance are on you

FAQ

Is this an AI tool or a calculator?

Primarily an engineering calculator suite, with AI and training material mentioned alongside.

Is it free?

Yes. It is described as a free open-source tool station.

Can I use it for formal design?

No. Formal drawings, capacity judgements and contract decisions need review by qualified engineering personnel.

Last reviewed: 2026-09-15

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