Basic Calculator
A simple, fast calculator for everyday arithmetic.
What is it?
This is a straightforward four-function calculator for everyday arithmetic — addition, subtraction, multiplication, and division, with parentheses for grouping — without the trigonometric or logarithmic functions of a scientific calculator.
Formula Explanation
Each button builds up an expression exactly as you'd write it on paper, including parentheses for grouping operations. Pressing = evaluates the full expression using standard order of operations (multiplication and division before addition and subtraction).
Example Calculation
Typing (4 + 6) × 2 and pressing = returns 20 — the parentheses ensure the addition happens before the multiplication.
How to Use
- Tap number and operator buttons to build your expression.
- Use ( and ) to group operations when needed.
- Press ⌫ to remove the last character if you make a mistake.
- Press = to evaluate, or C to clear and start over.
Benefits
- Fast, simple, and free of unnecessary scientific functions for everyday math.
- Supports parentheses for correctly grouped calculations.
- Works instantly in your browser — no app download needed.
Use Cases
- Quick everyday arithmetic — bills, shopping totals, splitting costs.
- Checking simple calculations without reaching for a physical calculator.
- A distraction-free alternative to a scientific calculator for basic math.
What Your Result Means
The result reflects the exact evaluation of your typed expression using standard order of operations. An "Error" result means the expression was incomplete or invalid — check for unmatched parentheses or a missing number between operators.
Tips
- Use parentheses whenever you need a specific part of the calculation done first.
- Use ⌫ instead of clearing everything when you only need to fix the last digit.
- Need trigonometry, logarithms, or powers? Use the Scientific Calculator instead.
Common Mistakes
- Forgetting to close a parenthesis before pressing =.
- Chaining two operators without a number between them (like "5 + × 2").
- Expecting percentage or memory functions — this calculator focuses on core arithmetic only.
FAQs
What's the difference between this and the Scientific Calculator?
This Basic Calculator covers only the four core arithmetic operations plus parentheses, while the Scientific Calculator adds trigonometric, logarithmic, and power functions.
Why do I get "Error"?
This usually means the expression is incomplete or invalid — check that every opening parenthesis has a matching closing one and that operators have numbers on both sides.
Can I edit part of my expression?
Use the ⌫ (backspace) button to remove the last character at a time, or C to clear everything and start over.
Expressions are evaluated using standard order of operations directly in your browser.
Last updated: July 26, 2026