Online calculator

What it does and when to use it

Handle everyday calculations with a free calculator and no registration. Type an expression or use the keys: combine decimals, parentheses and percentages, copy the result and reuse recent calculations.

How to use the online calculator

Enter numbers and choose +, −, × or ÷. Use parentheses to decide which operations run first, then press Calculate or Enter. For example, 25 × (8 + 2) gives 250; without parentheses, 25 × 8 + 2 gives 202.

AC clears the current expression and ⌫ deletes the last digit or selection. After a result, choose an operator to continue calculating or a number to start a new expression.

Percentages, increases and discounts

The % key expresses a quantity divided by 100: 15% equals 0.15. To find 15% of 200, enter 200 × 15% to get 30.

When directly adding or subtracting a percentage, its base is the value to its left: 200 + 15% gives 230 and 200 − 15% gives 170. For dedicated percentage calculations, explore the percentage calculator in the catalog.

Decimals, precision and privacy

Use either a dot or comma as the decimal separator, without thousands separators: enter 1500.5 or 1500,5. Results display up to 14 significant digits; very large or small numbers use scientific notation. Calculations use browser numeric arithmetic and may involve rounding.

Your expressions, results and history stay on this page. History holds up to eight calculations and disappears when you reload or close the page. It is not saved in browser storage.

Limits and checks

• Yes. Type numbers, operators and parentheses in the Expression field. Enter or = calculates the result; Esc clears the calculation and Backspace deletes within the field.