My history
Every calculation you saved, across all tools. Each entry replays in one click.
No saved calculation yet. On each tool, "Save to history" adds the calculation here.
This history lives in this browser, never on a server: nothing you compute is sent to us. The accepted trade-off: it is erased if you purge the site data, and does not sync across devices. To change machines, export it: your history is a file that belongs to you.