Basic Calculator
A simple online calculator supporting add, subtract, multiply, and divide, with decimal, sign toggle, percentage, and calculation history. Use the on-screen buttons or your keyboard.
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No calculations yet
Tip: use your keyboard — number keys, + − * /, Enter (=), Backspace, Esc (AC).
Features
Add, subtract, multiply, divide
Decimal and negative numbers
Percent and sign toggle
Clear / backspace
Full keyboard support
Calculation history
How to Use
1. Click number and operator buttons to build an expression, then press = to evaluate.
2. Or use your keyboard: digits, + − × ÷, Enter (=), Backspace, Esc (clear).
3. +/- toggles the sign; % converts the current number to a percentage.
4. The History panel on the right keeps recent calculations — click any entry to recall the result.
Frequently Asked Questions
Can I use my keyboard?
Yes. Number keys, +, -, *, /, Enter (=), Backspace, Escape (clear), and . all work.
How does percent work?
Pressing % converts the current number to its percentage form (divides by 100).
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