Standard Calculator
A fast, safe, and responsive calculator for everyday arithmetic — no installation required.
Safe Expression Evaluation
Unlike many online calculators that use eval() — which is a security risk — this calculator uses a custom recursive descent parser that only accepts digits, decimal points, and the four standard operators. Your expressions are evaluated safely with correct operator precedence (multiplication and division before addition and subtraction).
When Australians Use a Calculator
- ✔GST calculations: divide by 11 to find the GST component in a price-inclusive amount.
- ✔Split bills: divide the total by the number of diners instantly.
- ✔Unit price: divide total price by quantity to compare supermarket value.
- ✔Tip calculation: multiply by 1.10 for a 10% tip on a restaurant bill.
Frequently Asked Questions
What is a standard calculator used for?
A standard calculator performs basic arithmetic: addition, subtraction, multiplication, and division. It is used for everyday math such as splitting bills, calculating discounts, checking change, and solving quick equations without needing a scientific calculator.
How do I calculate using order of operations?
Order of operations (BODMAS/PEMDAS) means: Brackets first, then Orders (powers), then Division and Multiplication (left to right), then Addition and Subtraction. Our standard calculator handles this precedence automatically when you enter a full equation.
Can I use this calculator on my phone?
Yes. This calculator is fully responsive and works on all modern smartphones and tablets through any web browser — no app download required.
How accurate is this digital calculator?
This calculator uses JavaScript's IEEE 754 double-precision floating point, which provides up to 15–17 significant decimal digits of accuracy — more than sufficient for all everyday calculations.
Is there a history feature?
The equation display shows your current in-progress calculation. For a full history of recent calculations, you can scroll back through the display after each result.
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