• Octal (base 8) to Base 10
• Octal (base 8) to Base 11
• Octal (base 8) to Base 12
• Octal (base 8) to Base 13
• Octal (base 8) to Base 14
• Octal (base 8) to Base 15
• Octal (base 8) to Base 16
• Octal (base 8) to Base 17
• Octal (base 8) to Base 18
• Octal (base 8) to Base 19
• Octal (base 8) to Base 2
• Octal (base 8) to Base 20
• Octal (base 8) to Base 21
• Octal (base 8) to Base 22
• Octal (base 8) to Base 23
• Octal (base 8) to Base 24
• Octal (base 8) to Base 25
• Octal (base 8) to Base 26
• Octal (base 8) to Base 27
• Octal (base 8) to Base 28
• Octal (base 8) to Base 29
• Octal (base 8) to Base 3
• Octal (base 8) to Base 30
• Octal (base 8) to Base 31
• Octal (base 8) to Base 32
• Octal (base 8) to Base 33
• Octal (base 8) to Base 34
• Octal (base 8) to Base 35
• Octal (base 8) to Base 36
• Octal (base 8) to Base 4
• Octal (base 8) to Base 5
• Octal (base 8) to Base 6
• Octal (base 8) to Base 7
• Octal (base 8) to Base 8
• Octal (base 8) to Base 9
• Octal (base 8) to Binary (base 2)
• Octal (base 8) to Decimal
• Octal (base 8) to Duodecimal (base 12)
• Octal (base 8) to Hexadecimal (base 16)
• Octal (base 8) to Hexatrigesimal (base 36)
• Octal (base 8) to Quaternary (base 4)
• Octal (base 8) to Quinary (base 5)
• Octal (base 8) to Senary (base 6)
• Octal (base 8) to Ternary (base 3)
• Octal (base 8) to Hexadecimal (base 16)

• Decimal to Quaternary (base 4)
• Decimal to Quinary (base 5)
• Quaternary (base 4) to Decimal
• Hexatrigesimal (base 36) to Decimal
• Binary (base 2) to Quinary (base 5)
• Decimal to Duodecimal (base 12)
• Quinary (base 5) to Decimal
• Senary (base 6) to Decimal

The octal numeral system, or oct for short, is the base-8 number system, and uses the digits 0 to 7. Octal numerals can be made from binary numerals by grouping consecutive binary digits into groups of three (starting from the right). For example, the binary representation for decimal 74 is 1001010. Two zeroes can be added at the left: (00)1 001 010, corresponding the octal digits 1 1 2, yielding the octal representation 112.