Open-source ceramic chemistry software

Free ceramic glaze calculator for potters

OpenGlaze turns glaze recipes into actionable chemistry: UMF, oxide roles, SiO₂:Al₂O₃ ratio, CTE risk, and computational optimization.

View OpenGlaze on GitHub Self-host with Docker

Short answer

OpenGlaze is a free, open-source ceramic glaze calculator for potters and studios. It helps you understand a recipe chemically, compare firing results, and self-host private glaze data instead of locking recipes into a proprietary service.

Why it matters

Spreadsheets can calculate a batch, but they rarely connect recipe percentages to material chemistry, glaze fit, documentation, and repeatable studio decisions.

Private by default

The supported launch path is self-hosted SQLite with Docker volumes, so studio recipes stay under your control.

Computational, not magic

The optimizer uses chemistry calculations and ranked suggestions; kiln tests still confirm real-world results.

How OpenGlaze helps

Enter or import a glaze recipe with material percentages.

Review UMF, oxide breakdown, SiO₂:Al₂O₃ ratio, and predicted surface clues.

Use CTE and optimizer guidance to choose the next test tile before wasting kiln space.

FAQ

Is OpenGlaze a ceramic glaze calculator?

Yes. OpenGlaze calculates UMF, oxide analysis, CTE estimates, and recipe optimization from glaze materials.

Is it free?

Yes. OpenGlaze is MIT licensed, open source, and self-hosted.