Calculator
What is this Calculator?
This is a standard arithmetic calculator for addition, subtraction, multiplication, and division. It works like the calculator on your phone, with a running display so you can see your full calculation before committing to the result.
How It Works
Enter a number, choose an operator, enter a second number, then press equals. The four operations:
Example
You are splitting a $340 hotel bill between 4 people and need to add a $15 per-person parking fee.
- $340 / 4 = $85 per person
- $85 + $15 = $100 each
Tips
- Press C to clear the current entry without losing your previous number. AC clears everything.
- Dividing any number by zero returns an error. It is mathematically undefined.
- For percentage calculations, use the dedicated percentage calculator for a faster result.
Frequently Asked Questions
What is the order of operations?
PEMDAS means multiplication and division are calculated before addition and subtraction. So 2 + 3 x 4 equals 14, not 20. Parentheses override the default order.
Why can't you divide by zero?
Division by zero is undefined in mathematics. There is no number that, when multiplied by zero, gives a non-zero result. Calculators display an error rather than a value.
What is the difference between a basic and scientific calculator?
A basic calculator handles four arithmetic operations. A scientific calculator adds square roots, exponents, trigonometry, and logarithms. For everyday math, a basic calculator covers most needs.
How do I calculate a percentage on a basic calculator?
Divide the percentage by 100, then multiply by the base number. For 15% of 80: 15 / 100 = 0.15, then x 80 = 12. Or use the dedicated percentage calculator for a faster result.