A bold calculator with big chunky buttons, expression evaluation, calculation history, and full keyboard support.
The Evaluation Calculator lets you type complete mathematical expressions — like (250 * 1.18) / 4 — and get instant results. Unlike standard calculators that force you to press buttons one at a time, this tool evaluates the entire expression at once. Your last 20 calculations are saved in a scrollable history panel, and you can click any past result to reuse it. Everything works from the keyboard, so you never need to reach for the mouse. All calculations happen in your browser and your history is saved locally.
Full expression evaluation
Type entire formulas with parentheses and multiple operators instead of pressing buttons one at a time. Evaluate complex expressions in a single step.
Persistent calculation history
Your last 20 calculations are saved in a scrollable history panel. Click any result to reuse it in a new calculation. History persists across browser sessions.
Complete keyboard support
Type numbers and operators directly from your keyboard. Press Enter to evaluate, Backspace to delete, and Escape to clear. No mouse needed.
Large, responsive buttons
Bold, color-coded buttons organized by function — numbers, operators, special keys, and equals. Easy to use on both desktop and mobile screens.
Percentage and grouping support
Use the % operator for percentage calculations and parentheses for grouping operations. Handle tip splitting, tax calculations, and unit conversions easily.
No sign-up, fully private
Everything runs in your browser. No account needed, no data sent to any server. Your calculation history stays on your device.
All tools share data — your calendar shows habits, periods, and countdowns automatically.