A calculator you can type into
This online calculator works the way a calculator should and the way you type. Tap the keys, or type a whole calculation such as 255*1.05, 18.998 x 2 or (1,250,000 - 300,000) / 12, and the answer appears as you go. Press = or Enter to lock it in. It handles percentages and brackets, and in Scientific mode trigonometry, logarithms, powers and roots. Everything runs in your browser, nothing you type is sent anywhere, and your last 12 calculations stay on this device so you can reuse them.
Order of operations
Calculations follow the standard order taught as BODMAS or PEMDAS: brackets first, then powers, then multiplication and division from left to right, then addition and subtraction from left to right.
2 + 3 × 4= 14, not 20, because multiplication comes first.(2 + 3) × 4= 20.2^3^2= 512. Powers are worked right to left, so this is 2^9.-2^2= -4. The power applies before the minus sign, as in written maths.
If you forget a closing bracket, it is added for you when you press equals, so (2 + 3 gives 5.
How percentages work
The % key follows the same rules as Google's calculator, which is what most people expect:
50%= 0.5200 + 10%= 220, because after plus or minus it means 10% of the number before it.200 - 10%= 180200 × 10%= 2015% of 80= 12. You can type the word "of".
For reverse percentages and percentage change, the percentage calculator walks through each case step by step.
Adding or removing VAT
To add UAE VAT at 5%, multiply by 1.05: 255 × 1.05 = 267.75, or type 255 + 5%. To take VAT out of a total, divide instead: 267.75 ÷ 1.05 = 255. For 20% VAT, use 1.2 the same way.
Scientific mode
Switch to Scientific for the functions below. Choose Deg or Rad for angles. Degrees are the default, so sin(30) = 0.5.
| Key | What it does | Example |
|---|---|---|
| sin, cos, tan | Trigonometry | cos(60) = 0.5 |
| sin⁻¹, cos⁻¹, tan⁻¹ | Inverse trigonometry, answered in your angle unit | sin⁻¹(1) = 90 |
| ln, log | Natural log and base-10 log | log(1000) = 3 |
| eˣ, 10ˣ | Exponentials | 10^3 = 1,000 |
| x², x³, xʸ | Powers | 2^10 = 1,024 |
| √, ∛ | Square and cube roots | √144 = 12 |
| n! | Factorial, for whole numbers up to 170 | 5! = 120 |
| |x|, 1/x | Absolute value and reciprocal | 4^(-1) = 0.25 |
| π, e | Constants. Write 2π for 2 × π | 2π = 6.2831853072 |
Ans inserts your previous answer, so you can chain results. After 12 × 7, type Ans ÷ 4 to get 21.
Keyboard shortcuts
- Numbers,
+ - * / ^ % ( )and!type directly. - Enter or = shows the answer.
- Backspace deletes the last character, or a whole function name such as sin(.
- Esc clears everything.
How accurate is it?
Like every digital calculator, this one stores numbers in binary, which cannot hold some decimals exactly. That is why a raw computer sum of 0.1 + 0.2 comes out as 0.30000000000000004. This calculator rounds every answer to 12 significant digits, so you see 0.3, and shows very large or very small results in scientific notation, for example 3e+20. That is accurate for everyday, financial and school maths. When something cannot be calculated, such as dividing by zero or the square root of a negative number, it says so plainly instead of showing a meaningless result.
What it does not do
It does not plot graphs, solve equations or convert units. For measurements use the unit converter, and for money across currencies use the currency converter.