Quick answer: This online calculator handles everyday arithmetic: addition, subtraction, multiplication and division, plus percentages and memory functions. It follows the standard order of operations, doing multiplication and division before addition and subtraction, so chained expressions evaluate the way a handheld calculator would. Use parentheses to force your own grouping.
Last reviewed: September 2026
Key facts
- Follows the standard order of operations: brackets first, then × and ÷, then + and −.
- Use the on-screen keys or your physical keyboard — Enter gives the answer, Backspace deletes, Escape clears.
- The % key turns the current entry into hundredths (15% → 0.15), handy for quick percent math.
- Everything runs in your browser — no sign-up, and nothing you type is uploaded anywhere.
A basic calculator is the tool you reach for dozens of times a day: splitting bills, checking change, scaling a recipe. This free online calculator handles everyday arithmetic with an on-screen keypad plus full keyboard support, so it works like the calculator app on your phone on any device with a browser.
Type an expression such as (45 + 15) / 4 or 12.5 × 8 and press = (or Enter). Brackets let you group longer calculations, and the running expression stays visible above the answer so you can always check what you typed.
How to use
- Tap the number and operator keys, or just type on your keyboard.
- Use ( and ) to group parts of a longer calculation.
- Press = or Enter to see the answer; the expression stays visible for checking.
- Press Backspace to delete the last digit, or C / Escape to start over.
Order of operations (BODMAS / PEMDAS)
| Term | Meaning |
|---|---|
| Brackets ( ) | Calculate whatever is inside brackets first. |
| Multiply and divide | Done next, working left to right. |
| Add and subtract | Done last, working left to right. |
Because of this order, 2 + 3 × 4 = 14, not 20. Use brackets to force your own order: (2 + 3) × 4 = 20.
Worked examples
Everyday arithmetic
12.5 × 8 = 100. Type 12.5*8 and press Enter. Decimals work everywhere a whole number does.
(45 + 15) ÷ 4 = 15. The brackets force the addition first — without them, 45 + 15 ÷ 4 would be 48.75.
Percent shortcut
15% of 200: type 200*15% and press =. The % key converts 15 to 0.15, giving 30.
2.5 × (10 − 4) = 15 — a typical recipe-scaling style calculation in one line.
Keyboard shortcuts
| Key | Does this |
|---|---|
| 0–9 and . | Enter digits and the decimal point |
| + − * / | Add, subtract, multiply, divide |
| Enter | = — calculate the answer |
| Backspace | Delete the last digit |
| Escape | Clear everything |
| ( ) | Group part of a calculation |
| % | Divide the current entry by 100 |
Frequently asked questions
Can I use my keyboard?
Yes. Digits, + − * / . ( ), Enter for equals, Backspace to delete and Escape to clear all work — exactly like a desk calculator.
Does it follow the order of operations?
Yes. Brackets first, then multiplication and division, then addition and subtraction — the standard BODMAS/PEMDAS order taught in schools.
How does the % key work?
It divides the current entry by 100, turning 15% into 0.15. So 200 × 15% gives 30 — a quick way to take a percentage of a number.
Is my calculation sent to a server?
No. Everything is computed locally in your browser with JavaScript, so it works offline once loaded and nothing you type leaves your device.
Why do I get 48.75 for 45 + 15 / 4?
That is the correct order of operations: division before addition (15 ÷ 4 = 3.75, plus 45). Add brackets — (45 + 15) / 4 — to get 15.
Sources
- Maths is Fun — Order of operations and arithmetic
- Khan Academy — Free arithmetic courses
Key takeaways
- Type expressions naturally with brackets; the calculator respects the standard order of operations.
- Keyboard shortcuts (Enter, Backspace, Escape) make it as fast as a physical calculator.
- Use the % key to turn any entry into hundredths for quick percentage math.
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