An ISO calculation tool for engineers

ISO standard calculations, turned into drawings and CAD.

Run tolerance, chain and gear calculations; auto-generate 2D technical drawings and 3D models from the results, and export to DXF. Scientific calculator and unit converter included.

Coming soon on Google Play
Beta

Join the Beta

Be among the first to try Calcso. Join the beta program in three easy steps and help shape the development.

1 👥

Join the Group

Join the Google Groups tester group to get beta access.

Join Group
2 ✅

Opt In to Testing

Accept the beta testing program on Google Play.

Opt In
3 📲

Download the App

Install Calcso from Google Play and explore the beta release.

Open Play Store

What you can do

From calculation to technical drawing and CAD output, in one app.

286

Tolerances & Fits

ISO 286 tolerance and fit calculations.

606

Chain & Sprocket

ISO 606 chain and sprocket sizing.

54

Gears

ISO 54 module-based gear calculations and meshing.

2D

Technical Drawing

2D drawings with ISO 128/129 layers and dimensions.

3D

3D Model

Interactive 3D models from your calculation parameters.

DXF

DXF Export

1:1 scale, CAD-ready DXF output.