Basic Calculator
Add, subtract, multiply & divide — click or type
Tip: use your keyboard — digits, + − * /, Enter, Backspace, Esc
Frequently Asked Questions
How do I use the basic calculator?
Click the buttons or type on your keyboard. Enter a number, choose an operation (+, −, ×, ÷), enter the next number, and press = or Enter to see the result. Press AC to clear everything, or the ± and % keys for sign change and percentages.
Does the calculator support keyboard input?
Yes. Use the number keys for digits, + − * / for operations, Enter or = for equals, Backspace to delete the last digit, and Escape to clear. Everything runs instantly in your browser.
How does the percent (%) key work?
The % key converts the current number to a percentage of the previous value. For example, 200 + 10 % gives 20 (10% of 200), so 200 + 10% = 220. Used alone, it divides the current number by 100.
Is my calculation private?
Completely. Every calculation runs locally in your browser — nothing you type is sent to a server, stored, or tracked.
What is the order of operations?
This is a standard four-function calculator that evaluates left to right as you enter each operation, like a classic desktop calculator. For full order-of-operations (PEMDAS) with parentheses and exponents, use our Scientific Calculator.