Online Calculator
A fast, dependable online calculator for everyday arithmetic - with keyboard support, percentage and order-of-operations handling via the same engine that powers this site's scientific calculator.
Updated September 2026 · Written and verified by Akash Pandey
Online Calculator
How to use the online calculator
- Click the buttons or type directly - the display accepts numbers, operators and parentheses.
- Press = (or Enter) to evaluate. The engine applies standard order of operations.
- Use C to clear, ⌫ to backspace, and % for percentages.
- Results copy with the copy button.
This calculator reuses the same math engine as the Scientific Calculator, so expressions like 10 ÷ 4 × 5 follow genuine operator precedence rather than running left-to-right.
Frequently asked questions
Does it follow order of operations?
Yes - the same engine used across this site evaluates multiplication/division before addition/subtraction, with parentheses overriding.
Can I use the keyboard?
Yes. Digits, operators, Enter to evaluate, Backspace to delete and Escape to clear all work.
What does the % button do?
Handles percentages directly: "200 × 15%" evaluates to 30, and "68 − 25%" gives 51.
How precise is it?
It uses standard double-precision arithmetic and cleans up floating-point noise (0.1 + 0.2 shows 0.3). See the FAQ on the main site for details.
Is it really free?
Yes - no account, no limits, no data collected. Everything runs in your browser.
Does this calculator follow standard order of operations (PEMDAS/BODMAS)?
Yes. Multiplication and division take precedence over addition and subtraction, and parentheses override standard precedence.
Can I use keyboard input with this online calculator?
Yes. You can use standard keyboard number keys, operators (+, -, *, /), Enter to evaluate, and Backspace to delete.
How does percentage calculation work here?
In arithmetic expressions like 50 + 10%, the calculator correctly calculates 10% of 50 (adding 5) to yield 55.