A free online calculator that works like the one on your phone
This online calculator is a fast, distraction-free calculator for everyday sums: shopping totals, splitting a bill, checking an invoice, working out a recipe, or helping with homework. It has touch-friendly keys, the four basic operations, a percent key, a sign key, memory keys and a running history tape you can copy into an email or spreadsheet. Tick Large keys and display for extra-big, high-contrast keys, and choose Speak to hear results read aloud.
It follows the same rules as modern phone calculators, so 2 + 3 × 4 gives 14, not 20. The full expression and a live preview of the result appear above the answer while you type. Everything runs in your browser, works offline once loaded, and your history stays on your device.
Need more than the basics? Use the scientific calculator for powers, roots and trigonometry, the percentage calculator for percentage change, or the fraction calculator when you want exact fractions instead of decimals.
How to use the Online Calculator
- Tap the number keys, or simply start typing — the keyboard and number pad work as soon as the page opens.
- Choose an operation (+, −, × or ÷) and enter the next number. The expression line shows everything you have entered and a live “= …” preview of the answer.
- Press “=” or Enter to see the result. Press “=” again to repeat the last operation, which is handy for adding the same amount several times.
- Use ⌫ (Backspace) to fix a typo, C to clear the current number, or AC (Esc) to start again.
- Tap any line in the history tape to reuse its result, or press “Copy history” to paste every calculation somewhere else.
Online Calculator features
Correct order of operations
Multiplication and division are done before addition and subtraction, exactly like the calculator on an iPhone or Android phone.
Live expression and preview
See the whole calculation, not just the last number, plus the result before you press equals.
Memory keys
MC, MR, M+ and M− keep a running total in memory — useful for adding up several separate sub-totals.
History tape with copy
Your last 50 calculations are listed and saved on this device. Copy them all in one tap or reuse any result.
Full keyboard support
Digits, operators, Enter, Backspace, Escape, Delete, % and the number pad all work. F9 changes the sign.
Large keys and speech
A high-contrast mode with keys up to 100 px tall and a giant display, plus optional spoken keys and results — also on its own page as the large calculator.
Order of operations: why 2 + 3 × 4 = 14
Mathematics has an agreed order for working out an expression, taught as BODMAS in India and the UK (Brackets, Orders, Division/Multiplication, Addition/Subtraction) and PEMDAS in the US. Multiplication and division are done first, from left to right, then addition and subtraction. So 2 + 3 × 4 is 2 + 12 = 14.
Older pocket calculators and some desk calculators use immediate execution instead: they work out each step as soon as you press the next operator, so 2 + 3 × 4 becomes 5 × 4 = 20. This calculator uses proper precedence, like the calculators built into phones and computers. If you want the immediate-execution result, press “=” after each step.
| You type | This calculator | Immediate-execution calculator |
|---|---|---|
| 2 + 3 × 4 = | 14 | 20 |
| 10 − 6 ÷ 2 = | 7 | 2 |
| 8 ÷ 2 × 4 = | 16 | 16 |
| 1 + 2 + 3 × 0 = | 3 | 0 |
How the percent key works
The % key behaves the way most phone calculators do. After a plus or minus sign it takes a percentage of the number before it, which makes price changes easy: 200 − 15 % turns the 15 into 30 (15% of 200), so the answer is 170. After × or ÷, or on its own, it simply divides by 100: 50 × 10 % is 50 × 0.1 = 5.
For sales tax or GST, 1,000 + 18 % = gives 1,180; for shop offers, try the discount calculator.
| Keys | What happens | Result |
|---|---|---|
| 200 − 15 % = | 15% of 200 = 30, then 200 − 30 | 170 |
| 1000 + 18 % = | 18% of 1,000 = 180, then 1,000 + 180 | 1,180 |
| 50 × 10 % = | 10% = 0.1, then 50 × 0.1 | 5 |
| 45 % | 45 ÷ 100 | 0.45 |
Tips for accurate everyday calculations
- Use the memory keys for multi-part totals. Work out each line of a bill, press M+ after each one, then MR to recall the grand total.
- Typing a negative number? Press ± after an operator, then the digits — for example 9 × ± 3 gives 9 × (−3) = −27.
- Repeat a step quickly. 100 + 5 = = = adds 5 three times (105, 110, 115), which is useful for simple running totals.
Online Calculator FAQ
Is this online calculator free to use?
Yes — free, with no sign-up and no adverts inside the calculator, on phones, tablets and computers.
Does the calculator follow BODMAS / PEMDAS?
Yes. Multiplication and division are worked out before addition and subtraction, so 2 + 3 × 4 = 14. This matches the calculator apps on iPhone, Android, Windows and macOS in their standard modes.
Can I use my keyboard?
Yes. Type digits and + − * / directly, press Enter or = for the answer, Backspace to delete a digit, Delete to clear the entry and Escape to clear everything. The number pad works too, and Ctrl+C copies the result.
Can the calculator read results aloud?
Yes. Set Speak to Results, or to Keys and results, and your browser’s built-in voice reads them, for example “2 plus 3 times 4 equals 14”.
How do the MC, MR, M+ and M− buttons work?
M+ adds the number on the display to memory and M− subtracts it. MR recalls the stored value into your calculation and MC clears memory. While memory holds a value, a small “M” badge shows it.
Why does 0.1 + 0.2 not show 0.30000000000000004?
Computers store decimals in binary, which causes tiny rounding errors. This calculator rounds every intermediate result to 15 significant digits, removing that noise while keeping full everyday accuracy. Very large or tiny results switch to e-notation, such as 1.5e+20 (1.5 × 10²⁰).
Is my calculation history private?
Yes. The history tape and memory are stored only in your browser’s local storage on this device. Nothing is sent to a server, and the Clear button removes the history at any time.