🧮Numbers & Math

Numbers and maths — scientific calculator, percentages, and number systems

This free wizard gathers all the essential maths tools in one place: a scientific calculator with trigonometric functions and logarithms; a percentage calculator for quick discount and markup calculations; a Roman numeral converter; a number-system converter (binary, octal, hexadecimal); and a fraction converter. Everything is available without registration or installation.

Full privacy — calculations run locally

Every calculation is performed directly in your browser — no data is ever sent to a server. The wizard works even without an internet connection once the page has loaded.

Frequently asked questions

How do I convert a number to binary or hexadecimal?

In the "Number systems" tab, enter a decimal number and the wizard instantly converts it to binary (bin), octal (oct), and hexadecimal (hex). It also works in reverse — you can enter a value in any base.

Does the scientific calculator support brackets and order of operations?

Yes — the built-in scientific calculator follows the standard order of operations (BODMAS), supports brackets, exponentiation, square roots, trigonometric functions, and logarithms. Results are calculated in real time in your browser.

How do I express a decimal fraction as a common fraction?

The "Fractions" tab converts decimals to fractions and vice versa, and automatically simplifies the result to its lowest terms. You can also add, subtract, multiply, and divide two fractions.