Basic Calculator
Add, subtract, multiply and divide with a keyboard-friendly calculator that keeps every previous line visible so you can check your working.
How it works
Type the expression the way you would write it and the result appears as you go. Operator precedence is respected, so 2 + 3 × 4 gives 14, not 20 — multiplication and division bind more tightly than addition and subtraction.
Brackets override that order when you need them to. Every line you enter stays in the history above, which matters more than it sounds: most arithmetic errors are caught by re-reading what you actually typed rather than by recomputing.
The formula
Order of operations
brackets → × ÷ → + −
Left to right within the same level.
Percentage in an expression
50 + 10% → 50 + (50 × 0.10) = 55
Worked examples
| Scenario | Working | Result |
|---|---|---|
| 2 + 3 × 4 | Multiplication first | 14, not 20 |
| (2 + 3) × 4 | Brackets first | 20 |
| 144 ÷ 12 ÷ 3 | Left to right | 4 |
When you'd use it
- Quick sums without opening a spreadsheet
- Checking a bill or an invoice line
- Working through a calculation where you want to see each step
- Arithmetic while your phone is out of reach
Common questions
Why does 2 + 3 × 4 give 14 rather than 20?
Because multiplication is evaluated before addition. This calculator follows standard order of operations rather than working strictly left to right, which is what a spreadsheet or a programming language would also do. Use brackets if you want the addition first.
Can I use my keyboard?
Yes. Type digits and operators directly, Enter evaluates, and Escape clears. It is usually faster than clicking, particularly for longer expressions.
Is my calculation history saved anywhere?
Only in the page while it is open. Nothing is uploaded and nothing persists once you close the tab — the history exists so you can check your own working, not as a record.