Ice, water, or steam? A phase diagram maps how temperature and pressure decide a substance's state — and where all three can coexist.
Phase Diagram (Water)Live
solid, liquid, gas
Controls
Presets
A phase diagram maps which state — solid, liquid, or gas — a substance takes at each temperature and pressure. The lines are phase boundaries; cross one and the material transforms. All three meet at the triple point, and the liquid-gas line ends at the critical point beyond which liquid and gas become indistinguishable.
★ Sign in to save this setupSave your tuned setup, or drop this simulation into your own site, docs, or course page.
How it works
A phase diagram plots the stable phase at each temperature and pressure. Crossing a boundary line triggers melting, boiling, or sublimation. The three boundaries meet at the triple point, where solid, liquid, and gas coexist, and the liquid-gas line ends at the critical point beyond which the distinction disappears into a supercritical fluid.
✦
Ask the AI about this model
The math, the assumptions, real-world uses, or a code translation — explained for this exact simulation.
Yes. Phase Diagram (Water) runs entirely in your browser using your device's own compute, so local use is free forever. You only pay Compute Tokens if you scale a job to the cloud.
Do I need to install anything?▾
No. Everything runs client-side in a modern browser — no downloads, no license, no account required to start.
Can I save or share my simulation?▾
Create a free account to save projects, and use a shareable embed or minted DOI to publish a live, interactive version anywhere.
How accurate are the results?▾
The solver uses established numerical methods, but results are for research and educational purposes and should be validated against experiment or professional review before you rely on them.