Binary, Hex and Decimal Converter

About the Binary, Hex and Decimal Converter

Computers work in binary, programmers read hexadecimal, and people count in decimal. This converter takes a number in one base and shows it in binary, octal, decimal and hexadecimal at the same time.

How to use the Binary, Hex and Decimal Converter

1. Type your number in the Number box.
2. Choose the base it is written in from the From menu: Decimal, Binary, Octal or Hex.
3. Read the number in all four bases below.

Good to know

• Binary uses only 0 and 1, octal uses 0 to 7 and hexadecimal uses 0 to 9 plus A to F.
• For example, decimal 255 is 11111111 in binary, 377 in octal and FF in hex.
• The converter works with whole numbers up to 9,007,199,254,740,991. Larger values can lose accuracy.

Frequently asked questions

Why is hexadecimal popular in programming?

One hex digit stands for exactly four binary digits, so long binary values become short and easy to read.

Can it convert negative numbers or fractions?

No. Use whole, non-negative numbers.

What does "Invalid number" mean?

The number contains a digit that does not exist in the base you selected, such as 2 in binary.