Number base converter

Convert exact whole numbers between bases 2 and 36, including binary, decimal and hexadecimal views. Translate large integer values used in programming, identifiers and technical exercises without floating-point rounding.

3 guest runs per rolling 24 hours10 with a free accountPrivate inputsMobile-friendly

Number base converter workspace

Runs locally in your browser

Converts whole numbers exactly with arbitrary precision. Bases from 2 to 36 use digits 0–9 and letters A–Z.

Result

Converted value—

Decimal—

Binary—

Hexadecimal—

Use it with confidence

How to use the number base converter.

Add the requested inputs

Use the labelled fields in the workspace above. If example values are provided, try them first or replace them with your own.

Calculate and review

Use the main action when needed. The entered digits are parsed and converted with arbitrary-precision BigInt arithmetic; optional signs, separators and common base prefixes are supported.

Try a worked example

Convert FF from base 16 to 255 in base 10, 11111111 in binary or another selected radix.

Check the assumptions

Only whole numbers are supported. Fractions, exponent notation, two’s-complement widths and text encodings require separate interpretation.

Helpful answers