What does this calculator do?

It evaluates any arithmetic expression: +, −, ×, ÷, brackets, decimals and percentages. The result appears instantly as you type, and pressing = keeps the answer so you can chain further sums.

x% is read as x ÷ 100, so 50% becomes 0.5. For "what is X% of Y" or percentage change questions, use the percentage tab of the All-in-One Calculator.

Does it follow order of operations?

Yes: brackets first, then multiplication and division, then addition and subtraction, exactly like standard math notation.

Is my input stored anywhere?

No. Everything runs locally in your browser. An optional recent-calculations list is kept only on your own device.

Simple Arithmetic Calculator - Fast, Free & Online

A clean basic calculator for everyday sums: add, subtract, multiply and divide with brackets, percentages and a tap-friendly keypad. The answer updates as you type.

Inputs

Results

Enter your values - results update instantly.

How This Was Calculated

Assumptions

Recent Calculations

The Quick Sum, Done Properly

Sometimes you just need an answer: a bill split, a quick area, a back-of-envelope figure. This arithmetic calculator gives you a clean expression line plus a keypad, evaluates as you type and prints the working underneath, so there is no mystery about how the number came out.

Small Details That Matter

Live results - no equals press needed; the answer appears the moment the expression is complete.
Chain sums - press = (or Enter) to keep the answer and continue calculating from it.
Proper precedence - 2 + 3 × 4 gives 14, not 20; use brackets to override.

Need more than basic math? The All-in-One Calculator adds scientific functions, percentages and equation solvers, and the Unit Converter handles measurements.