Octal to Hexadecimal Converter
Convert octal numbers to hexadecimal, including fractions and negative numbers, with the working shown.
Change the values and press Calculate to work out your own figures.
Enter a octal number to write it in hexadecimal.
Show the working
- Write each octal digit as 3 bits: 111 101 101
- Regroup the bits in 4s from the right: 0001 1110 1101
- Replace each group with its hexadecimal digit: 1 E D
How to use it
Enter a octal number to write it in hexadecimal.
Letters stand for digits above 9 (A = 10 … Z = 35) and can be typed in either case; prefixes such as 0b and 0x, spaces and underscores are ignored. Show the working gives each step.
Key facts
octal → hexadecimal: regroup the bits (3 per octal digit, 4 per hex digit)
How the conversion works
Because 8 = 2³ and 16 = 2⁴, each octal digit is exactly 3 bits and each hex digit exactly 4, so the conversion is done by grouping bits.
Questions
What is 755 in hexadecimal?
1ED.
Can I convert fractions?
Yes. Digits after the point are converted exactly; if they repeat forever in the new base, the repeating block is shown in parentheses.
Formulas
octal → hexadecimal: regroup the bits (3 per octal digit, 4 per hex digit)
Sources
Limitations
- Numbers have at most 1,000 characters; Roman numerals cover whole numbers from 1 to 3,999,999.