Math Calculators
Basic Calculator
A simple online calculator.
FreeNo sign-upWorks in your browser
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About the Basic Calculator
A simple, fast online calculator for everyday math. Add, subtract, multiply, and divide, with percent and sign-change keys and a running operation display. Nothing to install, no sign-up — just open it and start calculating.
How to use the Basic Calculator
- 1Enter your numbers and an operation using the keypad.
- 2Read the result instantly — it recalculates as you type.
- 3Adjust the numbers to model different scenarios.
Frequently asked questions
Is this calculator free?
Yes — it runs entirely in your browser with no sign-up and nothing to install.
What operations does it support?
Addition, subtraction, multiplication, division, percent, and sign change, with a running display of the current operation.