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Calculator

Type with the keypad or your keyboard. × and ÷ are calculated before + and −, just like your phone.

Runs in your browser · Nothing uploadedFree · No install

Calculator

 
0

× and ÷ are calculated before + and − (2+3×4=14). Results show up to 15 significant digits.

After + or −, % takes a percentage of the number before it: 200+10% = 220.

History

Your calculations will appear here.

    How to use

    1. 1Tap the keys or type numbers and + − * / on your keyboard.
    2. 2Press = or Enter to see the result. Esc clears everything.
    3. 3Tap a history line to reuse its result, or press Copy.

    About this tool

    Order of operations: why 2+3×4 is 14

    This calculator works like the one on your phone and like a spreadsheet: multiplication and division are done before addition and subtraction. Typing 2 + 3 × 4 gives 14, not 20.

    The full expression stays visible on the small line above the result, so you can check what you typed before pressing =. If you want a different order, do it in two steps: 2 + 3 = then × 4 =.

    How the % key works

    • After + or −, % means “percent of the number before”: 200 + 10% = 220 and 200 − 10% = 180. Handy for tax, tips and discounts.
    • After × or ÷, or on its own, % simply divides by 100: 200 × 10% = 20 and 50% = 0.5.
    • Pressing = again repeats the last step: 200 + 10% = 220, then = gives 240.

    History, copy and keyboard

    The last 20 calculations are listed under the keypad. Tap one to put its result back in as the current number. The list lives only in this tab and disappears when you close it.

    Copy puts exactly the number shown on the display on your clipboard. On a computer you can type with the keyboard: digits, + − * /, % , Enter or = for the result, Backspace to delete a digit and Esc to clear everything.

    Decimals and 15-digit precision

    Computers store numbers in binary, which is why many calculators show 0.1 + 0.2 as 0.30000000000000004. This calculator rounds the result to 15 significant digits, so you see 0.3.

    Very large or very small results switch to scientific notation, for example 1e-10. Dividing by zero shows a clear message instead of a strange number; press any digit or C to continue.

    Frequently asked questions

    Why does 2+3×4 give 14 and not 20?

    Multiplication and division are calculated before addition and subtraction, the standard order of operations. Press = after 2+3 if you want to multiply the sum.

    How do I add 10% to a price?

    Type the price, then + 10 %, and press =. For example 25 + 10% = 27.5. Use − instead of + to take 10% off.

    What is the difference between C and AC?

    C clears only the number you are typing. When there is nothing to clear, the key becomes AC and clears the whole calculation. Your history is kept.

    Is my calculation sent anywhere?

    No. Everything is calculated in your browser and nothing is uploaded or stored on a server.

    Can I use it without a mouse?

    Yes. Type numbers and operators with the keyboard, press Enter for the result, Backspace to delete and Esc to clear.

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