Free Math Calculator Online – Solve Everyday Calculations
A fast arithmetic calculator handling + − × ÷ ^, powers and parentheses.
About the Basic Math Calculator
What is the Basic Math Calculator?
A basic math calculator evaluates arithmetic expressions with addition, subtraction, multiplication, division, powers and parentheses.
Why use this calculator?
Everyone makes order-of-operations mistakes. Typing the whole expression at once means the computer applies the rules consistently every time.
How to use it
- Type any arithmetic expression.
- Use + − * / ^ for add, subtract, multiply, divide and power.
- Use parentheses to control the order of operations.
- An exclamation mark after a number applies a factorial.
Formula
Evaluated with standard precedence: () then ^ then × ÷ then + −.
Factorial uses a gamma-function extension, so non-integer values are supported too.
Frequently Asked Questions
What does PEMDAS mean?
Parentheses, Exponents, Multiplication/Division, Addition/Subtraction — the standard evaluation order this calculator applies.
Why do I get a different result from a phone calculator?
Many simple phone apps evaluate left-to-right without full precedence rules. Typing the expression in one line usually gives the mathematically correct answer.
What order of operations does this use?
It follows standard PEMDAS/BODMAS rules: parentheses, exponents, multiplication and division, then addition and subtraction.
How precise are the answers?
The calculator uses double-precision floating-point math (about 15 significant digits) and rounds the display. For exact symbolic results use dedicated algebra software.
Can I enter negative numbers or decimals?
Yes. Negative values, decimals and very large or small numbers are all supported unless a field says otherwise.
What does it mean if I get an error?
Errors usually mean an invalid input, such as division by zero or a negative value where only positives make sense. Check your entries and try again.
Is this calculator free to use?
Yes. Every calculator on this site is completely free, with no hidden fees, no subscriptions and no limits on how many times you can use it.
How accurate are the results?
We use standard, widely accepted formulas and calculate in your browser using double-precision arithmetic. Results are rounded for readability, so treat them as reliable estimates rather than a guarantee. Real-world factors can vary the true figure.
Can I add this calculator to my own website?
Yes. Open this calculator page and use the "Add to your website" box in the sidebar to copy a ready-made iframe snippet, then paste it into any HTML page.
Does it work on a phone or tablet?
Yes. The layout is fully responsive, so it works on desktops, laptops, tablets and mobile phones, and every input adapts to touch screens.