Calculator Online (Arithmetic with Exponents) — Free
Runs 100% in your browser — your files never leave your device.
Quick arithmetic should not need a spreadsheet. Type or tap an expression with +, −, *, /, %, powers (^), and parentheses, and the answer updates as you type — with the full expression kept visible so you can check what you computed. Float noise is rounded away: 0.1 + 0.2 really is 0.3 here.
How it works
- 1
Type or tap the expression
Use the keypad or your keyboard — digits, operators, powers, and parentheses.
- 2
Read the live result
The answer appears as soon as the expression is valid; mistakes explain themselves.
- 3
Edit and continue
Change any part of the expression and the result follows instantly.
About this tool
A calculator that shows its work
The calculator evaluates your full expression — not one button press at a time — so precedence works the way you wrote it: multiplication before addition, parentheses grouping. Chain operations across the whole line and see the result instantly.
When a text calculator beats a button calculator
Pasting an expression from notes or code, editing one number inside a long sum without retyping it, and reviewing the whole calculation for mistakes — these are text-native jobs. The keyboard is faster than a keypad for anything with parentheses.
Precedence, briefly
Parentheses first, then multiplication and division, then addition and subtraction, left to right within each tier. If a result surprises you, add parentheses to force the order you meant — the expression stays readable and the intent becomes explicit.
Frequently asked questions
Does it respect order of operations?
Yes — standard precedence applies: parentheses, then multiplication and division, then addition and subtraction, evaluated left to right within each tier.
Can I use very large or very small numbers?
Yes — the calculator works in floating point, so scientific-scale numbers work; results near the precision limit may show rounding in the last digits.
Why does my result show many decimal places?
Floating-point arithmetic represents some decimals inexactly — 0.1 plus 0.2 lands a hair off 0.3 in every binary calculator. Round the final result for presentation.