Basic Calculator
Quickly evaluate arithmetic expressions (add, subtract, multiply, divide, power, parentheses). Enter your values, click Calculate, and get the full result with its breakdown — everything is processed on your device, nothing is sent to a server.
All calculations run in your browser. Your data is never sent to our servers.
Example
Example Input
(2 + 3) * 4 - 10 / 2
Example Output
15
How to Use
- 1Fill in each input field with the values you want to compute.
- 2If there are choices (units, mode, operation), pick what you need.
- 3Click the Calculate button (or press Ctrl+Enter).
- 4The main result and its breakdown appear in the Result area. Click Copy to copy it.
About the Basic Calculator
The Basic Calculator evaluates full math expressions with proper order of operations (PEMDAS): multiplication and division before addition and subtraction, with parentheses overriding precedence. You type the whole expression at once instead of pressing buttons one by one.
The evaluator is built without any eval/Function calls, so it is safe and never runs arbitrary code — only recognised math operators. It supports +, −, ×, ÷, %, power (^), and nested parentheses.
FAQ
Is this Basic Calculator accurate?
Yes. It uses standard formulas and runs directly in your browser at full JavaScript precision (plus BigInt/decimal.js for large numbers where needed).
Is my data sent to a server?
No. All calculations happen entirely on your device. No values are sent to or stored on our servers.