Octal to Hexadecimal Conversion

Convert between Octal and Hexadecimal quickly and accurately.

oct
hex

How to Convert Octal to Hexadecimal

Conversion Formula

1 oct = 0.5 hex
1 hex = 2 oct

Example

Convert 15 oct to hex:

15 oct = 15 × 0.5 hex = 7.5 hex

Unit Information

Learn about the numbers units you're converting between

Octal

oct

Definition

Octal is a base-8 numeral system using digits 0, 1, 2, 3, 4, 5, 6, and 7. It was historically important in early computer systems and is still used in some programming contexts.

History/Origin

Octal was widely used in early computer systems, particularly in the 1960s and 1970s. It was popular because it maps easily to binary (3 bits per octal digit).

Current Use

Octal is used in some programming languages, file permissions (Unix/Linux), and certain computer science applications.

Multiplier

8

Offset

0

Hexadecimal

hex

Definition

Hexadecimal is a base-16 numeral system using digits 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, E, and F. It is widely used in computer science, programming, and digital systems.

History/Origin

Hexadecimal became important with the development of computers. It maps easily to binary (4 bits per hex digit) and is more compact than binary for representing large numbers.

Current Use

Hexadecimal is used extensively in computer programming, memory addresses, color codes (RGB), debugging, and digital systems.

Multiplier

16

Offset

0

Octal to Hexadecimal Conversion Table

Octal [oct] Hexadecimal [hex]
1 oct 0.5 hex
10 oct 5 hex
25 oct 12.5 hex
50 oct 25 hex
100 oct 50 hex
0 oct 0E+0 hex
-10 oct -5 hex
-40 oct -20 hex