Online Calculator
A free calculator that works like the one on your phone, plus an advanced scientific mode with inverse trig, logs, powers and roots, memory keys and combinations (nCr). Type with your keyboard or tap the keys.
النسخة العربية ↗How to use the calculator
- Tap the keys or type on your keyboard. The result updates as you type.
- Press = or Enter to save the result to your history. Tap any history line to reuse it.
- Use the scientific keys for trigonometry, logarithms, powers, roots, factorials, nCr/nPr and mod. Press 2nd for inverse functions (sin⁻¹, eˣ, 10ˣ, ∛), M+ / M− / MR / MC for memory and Ans for the last result. DEG/RAD switches between degrees and radians.
Order of operations
The calculator follows the standard order of operations, often remembered as BODMAS or PEMDAS: brackets first, then powers, then multiplication and division, then addition and subtraction. So 2 + 3 × 4 = 14, not 20. If you want 20, type (2 + 3) × 4.
| You type | Result | Why |
|---|---|---|
| 2 + 3 × 4 | 14 | Multiplication comes first |
| (2 + 3) × 4 | 20 | Brackets come first |
| −3^2 | −9 | The power applies before the minus sign |
| 2^3^2 | 512 | Powers are worked from right to left |
How the % key works
The percent key divides the number before it by 100. That makes everyday sums quick: 200 × 15% gives 30, the 15% tip on a 200 bill. For discounts, percentage change and VAT, the percentage calculator shows each step separately.
Scientific functions
- sin, cos, tan work in degrees by default. Tap DEG to switch to radians.
- log is base 10 and ln is the natural logarithm (base e).
- xʸ raises to any power, x² squares, and √ takes the square root.
- n! is the factorial, available for whole numbers up to 170.
- π and e are built in. You can write 2π without a multiplication sign.
Keyboard shortcuts
Digits, + − * / ^ ( ) % and ! work as you would expect. Enter or = gives the result, Backspace deletes the last character and Esc clears everything. Your last six results stay in the history on this device only.
Frequently asked questions
Why does 2 + 3 × 4 give 14?
Because multiplication is done before addition. Use brackets, (2 + 3) × 4, if you want the addition first.
Is the calculator in degrees or radians?
Degrees by default, which is what most school and everyday problems use. Tap DEG to switch to RAD.
Does the calculator save my calculations?
Only your last six results, stored in your own browser so you can reuse them. Nothing is sent to us.
Can I use it on my phone?
Yes. All the scientific keys fit on a phone screen. Tap Scientific if you want to hide them and keep only the basic keypad.
