Build your own
Build a custom calculator
Define your own inputs and a formula, preview it live, and share it with a link — no account, no uploads. Saved calculators stay on this device.
1. Name your calculator
2. Add inputs
3. Write the formula
Reference your inputs by their field name (e.g. tip + bill). Supports + - * / ^ %, parentheses, and sqrt() round() min() max() abs().