Number Base Converter
Convert between decimal, hex, binary and octal without losing precision.
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| Decimal | 255 |
| Hexadecimal | FF |
| Binary | 11111111 |
| Octal | 377 |
4F 6C C3 A1Bin
01001111 01101100 11000011 10100001
Quick answer: To convert hex to decimal (or any other base), pick the input base and type the number: the decimal, hexadecimal, binary and octal values appear instantly. The 0x, 0b and 0o prefixes are accepted. Below, convert text into hex and binary bytes.
How to do it in 3 steps
- 1Pick the input base.
- 2Type the number.
- 3Copy the value in the base you need.
Why use Pronto Arquivo
Big numbers
Uses BigInt, so it doesn’t lose precision like ordinary calculators.
Four bases
Decimal, hexadecimal, binary and octal.
Text to hex
See the UTF-8 bytes of any text.
Prefixes accepted
0xFF, 0b1010 and 0o17.
Guides
Hex colors
#FF8800 is three bytes: FF (255), 88 (136) and 00 (0), the red, green and blue values.
Frequently asked questions
How do I convert hex to decimal?
Choose Hexadecimal and type the number: the decimal appears instantly.
What is FF in decimal?
255.
How do I convert decimal to binary?
Choose Decimal and look at the Binary row.
Does it handle negative numbers?
Yes, with a minus sign.
