🧮 Online Calculator — Free, with History & Keyboard Support
A free, keyboard-friendly calculator that runs entirely in your browser — no account, no upload, and it works offline. Every calculation is saved to a scrollable history panel so you can review or recall previous results instantly.
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About
Toolio's Calculator handles everyday arithmetic — addition, subtraction, multiplication, division, and percentage — with full keyboard support so you never have to leave the home row. Your last 50 calculations are stored locally in your browser via localStorage; nothing is sent to any server. Because the tool is a self-contained static page it loads instantly and keeps working even when you go offline.
How to use
- Type numbers using your keyboard or click the on-screen buttons.
- Press +, −, ×, or ÷ (or the matching keyboard keys) to choose an operation.
- Use % to calculate percentages — for example, 200 + 10% adds 20.
- Press Enter or = to see the result; it is automatically saved to History.
- Click any item in the History panel to recall that result and continue calculating.
FAQ
- Is this calculator free?
- Yes, completely free with no ads, no sign-up, and no hidden limits.
- Does it upload my calculations to a server?
- No. All data stays in your browser's localStorage. Nothing is sent over the network.
- Does it work offline?
- Yes. The calculator is a self-contained static page and works without any internet connection after the first load.
- How many calculations does the history keep?
- The history panel stores your last 50 calculations. Older entries are dropped automatically to keep storage light.
- Can I use my keyboard instead of clicking buttons?
- Yes. Use the number keys, +, -, *, /, Enter (equals), Backspace, Escape (clear), and % — all standard keyboard keys are supported.