Add, subtract, multiply, divide — with history and keyboard support
Free to use
•No account required
•Calculations stay on your device
Calculator
0
Calculations stay on your device.
What you can do
•Addition, subtraction, multiplication, division
•Percent and sign change
•Session calculation history
•Full keyboard input
How it works
1
Enter numbers
Use the keypad or your keyboard.
2
Choose an operator
Press +, −, ×, or ÷.
3
Get the result
Press = or Enter. Use C/AC to clear.
Common uses
•Quick arithmetic
•Keyboard-driven workflows
•Check everyday totals
•Re-read a previous result from history
Frequently asked questions
Does it support keyboard input?
Yes — digits, operators, Enter, Escape, and Backspace map to calculator actions. The % key applies the percent button.
Is this a simple / browser calculator?
Yes. It is a basic four-function calculator that runs entirely in your browser — no install and no upload of your numbers.
Does it keep a history of calculations?
Yes. Completed calculations are listed under the keypad for the current session, up to the most recent 20. Clear history removes them, and nothing is stored on a server.
What do the ± and % keys do?
± flips the sign of the number on the display between positive and negative. % converts the displayed number to its decimal percentage form so you can continue the calculation.
When should I use Scientific instead?
Switch to Scientific Calculator when you need trigonometry, logarithms, powers, roots, factorials, or DEG/RAD mode. Basic stays focused on everyday arithmetic.
Is my input uploaded?
No. Calculation runs in your browser. Values are not sent to NeedAnyTool servers or analytics.
