Basic Calculator
A straightforward calculator for everyday sums. Tap the buttons or type on your keyboard, and chain operations together. Results are shown without the long trailing decimals that computers sometimes produce, so 0.1 + 0.2 shows 0.3.
How to use the basic calculator
- Enter a number, choose an operator (+, −, ×, or ÷), then enter the next number.
- Press = to see the result, or press another operator to keep going. Operations are applied in the order you enter them.
- Use ± to make the current number negative, ⌫ to delete the last digit, and C to start over.
- On a keyboard, type digits and + - * /, press Enter or = for the result, Backspace to delete, and Escape to clear.
Worked examples
Splitting a cost
84 ÷ 4 = 21. Four people sharing an 84 bill each pay 21.
Chained operations
2 + 3 × 4 entered in that order gives 20, because each step is applied as you go: 2 + 3 = 5, then 5 × 4 = 20. For standard order of operations (which gives 14), use the scientific calculator.
Working with negatives
5 − 8 = −3, and −3 × −2 = 6.
Good to know
- Results are rounded to 12 significant digits, and very large or very small results use exponent notation, such as 1.5e+20.
- Dividing by zero shows an error. Enter a new number or press C to continue.
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