How it works
Tokenizes and evaluates arithmetic safely (no eval). Shows each reduction in evaluation order so you can follow PEMDAS.
PEMDAS: ( ) then × ÷ then + −
When to use
Use this tool when you need to: try (2 + 3) * 4 for 20, or 2 + 3 * 4 for 14 — parentheses change the order.
How to use this tool
- Enter your values in the fields above.
- Review the formula and any mode options for your problem.
- Read the result and the step-by-step solution.
Try (2 + 3) * 4 for 20, or 2 + 3 * 4 for 14 — parentheses change the order.
Frequently asked questions
- What is the Basic Calculator?
- Tokenizes and evaluates arithmetic safely (no eval). Shows each reduction in evaluation order so you can follow PEMDAS.
- How do I use the Basic Calculator?
- Enter the required values, then calculate. The Basic Calculator shows results, formulas, and step-by-step work when available. No account is required.
- What formula does the Basic Calculator use?
- PEMDAS: ( ) then × ÷ then + −
- Percentage CalculatorSolve percentage proportion, common phrases, difference, and percent change.
- Percent Error CalculatorCompare an observed value to a true value and get absolute, relative, and percent error.
- Ratio CalculatorSolve A:B = C:D, simplify ratios, and enlarge or shrink by a factor.
- Rounding CalculatorRound numbers by place precision, fraction units, or significant figures — with multiple rounding modes.
- Exponent CalculatorSolve base^exponent = result for any missing value — with optional base e and exponent laws.
- Root CalculatorSquare, cube, and general nth-root calculator with principal root, ± for even roots, and verification.
Browse categories