A calculator that stays out of your way.
Tap or type. Standard arithmetic, percent, and a clean display.
Keyboard works too — digits, operators, Enter to calculate, Backspace to delete, Esc to clear.
About
A clean browser calculator for everyday arithmetic. It supports addition, subtraction, multiplication, division, and percent. Standard operator precedence is applied automatically — × and ÷ run before + and −.
All math runs locally in your browser. No data leaves your machine, no analytics on keystrokes, no signup.
How to Use
- Tap or type digits and operators directly into the calculator.
- Use AC to clear and ⌫ (Backspace key) to delete the last character.
- Press = or Enter to evaluate the expression.
- Use % to convert the previous number to a fraction (divides by 100).
Formula Used
Expressions are parsed by a small recursive-descent parser following standard arithmetic precedence:
Example Calculation
Frequently asked questions.
Is this calculator free to use?
Yes, Binary Lab's basic calculator is completely free with no signup required.
Does it support keyboard input?
Yes. Digits 0–9, period, +, −, *, /, %, Enter to calculate, Backspace to delete, and Escape or C to clear.
How is order of operations handled?
Standard order of operations: × and ÷ before + and −. The expression is parsed by a small recursive-descent parser, with no eval() and no remote calls.
Does it work offline?
Yes. Once the page is loaded, the calculator runs entirely in your browser — no network is needed for further calculations.
Is my data tracked?
No calculations leave your browser. Nothing is stored, sent, or analytics-tracked at the keystroke level.
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