What can I use this calculator for?

Anything from splitting a restaurant bill to checking compound-interest figures. The basic mode covers day-to-day arithmetic; scientific mode adds roots, powers, and memory operations for school or work.

Can I use my keyboard?

Yes. Number keys (0–9), operators (+, -, *, /), Enter for equals, Escape to clear, and Backspace to delete the last digit — all work exactly as you would expect.

What is the difference between basic and scientific mode?

Basic mode shows the four standard operations plus percentage. Scientific mode adds square root, exponents, and memory buttons (MS, MR, MC, M+, M−) for multi-step calculations.

Is my calculation history saved?

History is kept for the duration of your browser tab. Refreshing or closing the page clears it. Nothing is stored on a server.

How do I calculate a percentage?

Enter a number and tap %. This divides the number by 100 — so 50% becomes 0.5. To find 15% of 200, type 200 × 15 %.

Online Calculator

Basic and scientific calculator with keyboard support and calculation history

Features

Basic & scientific modes

Toggle between a simple four-function view and an expanded panel with roots, powers, and memory keys.

Full keyboard support

Enter numbers, operators, and hit Enter for results — never touch the mouse if you prefer not to.

Calculation history

A running log of every expression and its result, available until you close the tab.

No install, no login

Open the page and start calculating. Your data stays on your device — nothing is uploaded.

How to use this calculator

1
Pick a mode — Basic is fine for most tasks. Switch to Scientific when you need square roots, exponents, or memory.
2
Enter your expression — Click the on-screen buttons or just start typing — numbers, +, -, *, / all work from the keyboard.
3
Get the result — Press '=' or hit Enter. The answer appears on the screen.
4
Check past work — Open the History tab to review or re-use earlier calculations.

What you can calculate

Basic operations

Addition, subtraction, multiplication, division, and percentages — the essentials for everyday work.

Scientific functions

Square roots, exponents, memory store / recall / clear — useful for homework and light engineering.

Frequently asked questions

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