Binary to Decimal / Hex Converter
Convert binary to decimal, hexadecimal and octal. Convert decimal to binary. Shows working and bit breakdown. Free.
How to use the Binary Converter
Convert between number bases
Binary (base 2) uses only 0 and 1. Decimal (base 10) is everyday numbers. Hexadecimal (base 16) uses 0–9 and A–F. Octal (base 8) uses 0–7. All are ways to represent the same quantity — 1101 binary = 13 decimal = D hex = 15 octal.
Bit positions
In binary, each position represents a power of 2 — from right to left: 1, 2, 4, 8, 16, 32, 64, 128… To convert binary to decimal, add up the powers of 2 wherever a 1 appears. For example, 1101 = 8+4+0+1 = 13.
Frequently asked questions
Is the Binary Converter free to use?
Yes, the Binary Converter is completely free. There is no sign-up, no account required, and no limit on how often you can use it.
How accurate is the Binary Converter?
The Binary Converter uses standard mathematical formulas and produces results accurate to standard precision. For critical applications, always verify with an authoritative source.
What devices does the Binary Converter work on?
The Binary Converter works on any device with a modern web browser — desktop, laptop, tablet, or phone. It is mobile-friendly and works offline once the page has loaded.