Calculator Input
Result
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Basic Calculator
Enter expressions like (12+8)*3^2 and get instant accurate results with safe expression parsing and clear validation messages.
Fast arithmetic with safe parsing
The Basic Calculator is designed for day-to-day arithmetic where accuracy and speed both matter. You can mix operators, parentheses, powers, and selected helper functions without worrying about unsafe expression execution. The parser reads your input as tokens, applies precedence rules, and computes a reliable result.
This approach is especially useful when you need to evaluate formulas from spreadsheets, coding tasks, finance notes, or homework drafts. Because the evaluator is strict, invalid syntax is caught early with readable messages.
Supported operations
- Arithmetic: + - * / %
- Power: ^
- Functions: sqrt(), abs(), fact()
- Constants: pi, e
Worked example step by step
Expression: (18 - 6) * 2^3 / 4
- Solve parentheses first: 18 - 6 = 12
- Resolve exponent: 2^3 = 8
- Multiply: 12 * 8 = 96
- Divide: 96 / 4 = 24
Final result is 24. Using the tool with the same expression should match this output. This is a quick way to confirm logic when debugging formulas.
Common mistakes and fixes
- Missing parenthesis → close each opening bracket before submit.
- Using unsupported symbols → stick to documented operators and functions.
- Factorial on non-integers → use whole numbers only.
Basic calculator questions
Can I chain multiple functions in one line?
Yes. Example: sqrt(abs(-81)) + log(100).
Does operator precedence match standard math?
Yes. Parentheses are evaluated first, then exponent, then multiply/divide, then add/subtract.
Can I paste expressions with spaces?
Yes. Whitespace is ignored safely during tokenization.
Why avoid eval-style calculators?
Parser-based evaluation is safer and easier to validate than raw runtime expression execution.
When should I use Scientific Calculator instead?
Use Scientific when your formula heavily relies on trig/log workflows and nested function calls.
Related tools: Scientific Calculator, Base Converter, Complex Calculator