Online Calculator

A fast, simple calculator that works with your mouse, touchscreen or keyboard. It follows the order of operations, supports brackets and percentages, and keeps a history.

 
History

    How to use the calculator

    1. Tap the buttons or type on your keyboard. The live preview under the display shows the answer as you go.
    2. Press = or Enter to finish. The full expression moves to the top line so you can check it.
    3. Keep going: type an operator to continue from the answer, or a number to start fresh.
    4. Use ⌫ to fix a mistake and AC to clear everything.

    Keyboard shortcuts

    KeyAction
    0–9 .Numbers and decimal point
    + - * /Add, subtract, multiply, divide
    ( ) ^ %Brackets, power and percent
    Enter or =Calculate
    Backspace / EscDelete one character / clear all

    Order of operations in practice

    Calculators that work one step at a time (like many cheap pocket calculators) would turn 2 + 3 × 4 into 20. Math rules say multiplication comes first, so the right answer is 14. This calculator reads the whole expression, so it always gets it right. When in doubt, add brackets: (2 + 3) × 4 = 20.

    Everyday examples

    • Split a bill: 186.40 ÷ 4 = 46.6
    • Add tax: 59.99 × 1.0825 = 64.94
    • Area of a room: 12.5 × 14 = 175 square feet
    • Price after 20% off: 80 − 80 × 20% = 64

    Need trig, logs or powers? Switch to the scientific calculator. For tips and discounts, the tip calculator and percentage calculator do the work for you.

    Last reviewed October 2026.

    Frequently asked questions

    Can I type with my keyboard?

    Yes. Click the display and type numbers and the symbols + − * / ( ) and ^. Press Enter or = to get the answer, Backspace to delete and Esc to clear everything.

    Does this calculator follow the order of operations?

    Yes. It follows the standard order (often taught as PEMDAS or BODMAS): parentheses first, then exponents, then multiplication and division from left to right, then addition and subtraction. So 2 + 3 × 4 gives 14, not 20.

    Why does it show 0.3 for 0.1 + 0.2?

    Computers store decimals in binary, which can make 0.1 + 0.2 come out as 0.30000000000000004 in many apps. This calculator rounds results to 12 significant digits, so you see the answer you expect.

    How do I use the answer from my last calculation?

    After you press =, start typing an operator such as + or × and the calculator continues from the previous answer. Tap any line in the history to bring that result back.

    How do percentages work?

    The % key divides the number before it by 100. For example, 200 × 15% gives 30. To add a percentage, type 200 + 200 × 15%. For more percentage problems, use the percentage calculator.