Number Base Converter
Type a number in any base (2, 8, 10, 16) and convert it to another base.
Calculator
Use the Number Base Converter
Result
—
Formula
parse in base-from → render in base-to
Step-by-step
- 1
Enter the number
Use digits valid for the source base.
- 2
Pick the bases
Choose source and target bases.
Worked example
Example input: value: 255, from: 10, to: 16
Result: FF
Related tools
- Scientific Notation
Express numbers as mantissa × 10^n.
Frequently asked questions
Which bases are supported?
Binary, octal, decimal and hexadecimal — bases 2, 8, 10 and 16, the four computing-culture standards. The two dropdowns above select the input and output bases for any rewrite.
What does 255 become in hexadecimal?
FF — the largest two-digit byte value. F stands for fifteen, so FF reads fifteen times sixteen plus fifteen, which lands at 255. The example above shows the same pair.
Why do letters appear in base 16?
Hexadecimal needs 16 digits but the alphabet of numerals stops at 9, so A through F stand in for ten through fifteen. That keeps every digit a single character as bases require.