Octal

The octal numeral system, or oct for short, is the base-8 number system, and uses the digits 0 to 7 Plural name is octals.




Conversion Tool



Sample Base Number Conversion

120 base-3 to decimals, the result is 15
15 decimal to base-12, the result is 13
30 base-5 to decimals, the result is 15
15 decimal to base-7, the result is 21
15 decimal to base-4, the result is 33
f base-32 to decimals, the result is 15
15 decimal to base-6, the result is 23
15 decimal to base-5, the result is 30
15 decimal to base-32, the result is f
30 base-5 to base-10, the result is 15

Table Conversion and Table Chart

Octal to Other Units

Octal can convert to other units, such as base-10, base-11, base-12, base-13, base-14, base-15, base-16, base-17, base-18, base-19, base-2, base-20, base-21, base-22, base-23, base-24, base-25, base-26, base-27, base-28, base-29, base-3, base-30, base-31, base-32, base-33, base-34, base-35, base-36, base-4, base-5, base-6, base-7, base-8, base-9, binary, decimal, hexadicimal and more. You can find the reference table below:

Unit to Other Unit Base Number Conversion Base Number Table
12 base-8 = 10 base-10octals to base-10octals to base-10 table
20 base-8 = 15 base-11octals to base-11octals to base-11 table
19 base-8 = 1 base-12octals to base-12octals to base-12 table
18 base-8 = 1 base-13octals to base-13octals to base-13 table
17 base-8 = 11 base-14octals to base-14octals to base-14 table
16 base-8 = e base-15octals to base-15octals to base-15 table
15 base-8 = d base-16octals to base-16octals to base-16 table
14 base-8 = c base-17octals to base-17octals to base-17 table
13 base-8 = b base-18octals to base-18octals to base-18 table
12 base-8 = a base-19octals to base-19octals to base-19 table
11 base-8 = 1001 base-2octals to base-2octals to base-2 table
10100 base-8 = a80 base-20octals to base-20octals to base-20 table
10 base-8 = 8 base-21octals to base-21octals to base-21 table
k base-8 = 0 base-22octals to base-22octals to base-22 table
k base-8 = 0 base-23octals to base-23octals to base-23 table
k base-8 = 0 base-24octals to base-24octals to base-24 table
k base-8 = 0 base-25octals to base-25octals to base-25 table
k base-8 = 0 base-26octals to base-26octals to base-26 table
k base-8 = 0 base-27octals to base-27octals to base-27 table
k base-8 = 0 base-28octals to base-28octals to base-28 table
k base-8 = 0 base-29octals to base-29octals to base-29 table
k base-8 = 0 base-3octals to base-3octals to base-3 table
202 base-8 = 4a base-30octals to base-30octals to base-30 table
k base-8 = 0 base-31octals to base-31octals to base-31 table
k base-8 = 0 base-32octals to base-32octals to base-32 table
k base-8 = 0 base-33octals to base-33octals to base-33 table
k base-8 = 0 base-34octals to base-34octals to base-34 table
k base-8 = 0 base-35octals to base-35octals to base-35 table
k base-8 = 0 base-36octals to base-36octals to base-36 table
k base-8 = 0 base-4octals to base-4octals to base-4 table
110 base-8 = 242 base-5octals to base-5octals to base-5 table
40 base-8 = 52 base-6octals to base-6octals to base-6 table
32 base-8 = 35 base-7octals to base-7octals to base-7 table
26 base-8 = 26 base-8octals to base-8octals to base-8 table
24 base-8 = 22 base-9octals to base-9octals to base-9 table
22 base-8 = 10010 base-2octals to binariesoctals to binaries table
10100 base-8 = 4160 base-10octals to decimalsoctals to decimals table
20 base-8 = 10 base-16octals to hexadecimalsoctals to hexadecimals table

Other Units to Octal

Octal also canvert from other unit such as base-10, base-11, base-12, base-13, base-14, base-15, base-16, base-17, base-18, base-19, base-2, base-20, base-21, base-22, base-23, base-24, base-25, base-26, base-27, base-28, base-29, base-3, base-30, base-31, base-32, base-33, base-34, base-35, base-36, base-4, base-5, base-6, base-7, base-8, base-9, binary, decimal, hexadicimal and more. You can find the reference table below:

Unit to Other Unit Base Number Conversion Base Number Table
20 base-10 = 24 base-8base-10 to octalsbase-10 to octals table
19 base-11 = 24 base-8base-11 to octalsbase-11 to octals table
18 base-12 = 24 base-8base-12 to octalsbase-12 to octals table
17 base-13 = 24 base-8base-13 to octalsbase-13 to octals table
16 base-14 = 24 base-8base-14 to octalsbase-14 to octals table
15 base-15 = 24 base-8base-15 to octalsbase-15 to octals table
14 base-16 = 24 base-8base-16 to octalsbase-16 to octals table
13 base-17 = 24 base-8base-17 to octalsbase-17 to octals table
12 base-18 = 24 base-8base-18 to octalsbase-18 to octals table
11 base-19 = 24 base-8base-19 to octalsbase-19 to octals table
10100 base-2 = 24 base-8base-2 to octalsbase-2 to octals table
10 base-20 = 24 base-8base-20 to octalsbase-20 to octals table
k base-21 = 24 base-8base-21 to octalsbase-21 to octals table
k base-22 = 24 base-8base-22 to octalsbase-22 to octals table
k base-23 = 24 base-8base-23 to octalsbase-23 to octals table
k base-24 = 24 base-8base-24 to octalsbase-24 to octals table
k base-25 = 24 base-8base-25 to octalsbase-25 to octals table
k base-26 = 24 base-8base-26 to octalsbase-26 to octals table
k base-27 = 24 base-8base-27 to octalsbase-27 to octals table
k base-28 = 24 base-8base-28 to octalsbase-28 to octals table
k base-29 = 24 base-8base-29 to octalsbase-29 to octals table
202 base-3 = 24 base-8base-3 to octalsbase-3 to octals table
k base-30 = 24 base-8base-30 to octalsbase-30 to octals table
k base-31 = 24 base-8base-31 to octalsbase-31 to octals table
k base-32 = 24 base-8base-32 to octalsbase-32 to octals table
k base-33 = 24 base-8base-33 to octalsbase-33 to octals table
k base-34 = 24 base-8base-34 to octalsbase-34 to octals table
k base-35 = 24 base-8base-35 to octalsbase-35 to octals table
k base-36 = 24 base-8base-36 to octalsbase-36 to octals table
110 base-4 = 24 base-8base-4 to octalsbase-4 to octals table
40 base-5 = 24 base-8base-5 to octalsbase-5 to octals table
32 base-6 = 24 base-8base-6 to octalsbase-6 to octals table
26 base-7 = 24 base-8base-7 to octalsbase-7 to octals table
24 base-8 = 24 base-8base-8 to octalsbase-8 to octals table
22 base-9 = 24 base-8base-9 to octalsbase-9 to octals table
10100 base-2 = 24 base-8binaries to octalsbinaries to octals table
20 base-10 = 24 base-8decimals to octalsdecimals to octals table
14 base-16 = 24 base-8hexadecimals to octalshexadecimals to octals table

Base Number Units

Base Number

Base-10 [ base-10 ]

Base-10 is equivalent to decimal.

Base-11 [ base-11 ]

The undecimal (base-11) positional notation system is based on the number eleven. The undecimal requires eleven symbols 0-9 and A.

Base-12 [ base-12 ]

Duodecimal system (also known as base-12 or dozenal) is a positional notation numeral system using twelve as its base. The duodecimal requires twelve symbols such as: 0, 1, 2, 3 , 4, 5, 6, 7, 8, 9 , A and B.

Base-13 [ base-13 ]

Tridecimal, tredecimal, triskadecimal or base-13 is a positional numeral system with thirteen as its base. It uses 13 different digits for representing numbers. The digits for base 13 could be 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, A, B, and C.

Base-14 [ base-14 ]

Tetradecimal (base-14) positional notation system is based on the number fourtheen. The tetradecimal requires fourteen symbols such as : 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, A, B, C, D.

Base-15 [ base-15 ]

Pentadecimal (base-15) positional notation system is based on the number fifteen. The pentadecimal requires fifteen symbols such as: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, E.

Base-16 [ base-16 ]

Base-16 is equivalent to hexadecimal.

Base-17 [ base-17 ]

Base 17 or septendecimal is a positional numeral system with a radix of 17. The symbol used in this system are 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, E, F and G.

Base-18 [ base-18 ]

Base 18 or octodecimal is base on eighteen and require 18 different symbols (0, 1, 2, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, E, F, G and H.

Base-19 [ base-19 ]

Base 19 or nonadecimal is base on nineteen and require 19 different symbols (0, 1, 2, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, E, F, G, H and I.

Base-2 [ base-2 ]

Base-2 is equivalent to binary.

Base-20 [ base-20 ]

The vigesimal or base 20 numeral system is based on twenty. The twenty symbols used are 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, E, F, G, H, I and J.

Base-21 [ base-21 ]

Base 21 or unovigesimal numeral system is based on twenty-one. The twenty one symbols used are 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, E, F, G, H, I, J and K.

Base-22 [ base-22 ]

Base 22 or duovigesimal numeral system is based on twenty-two. The twenty two symbols used are 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, E, F, G, H, I, J, K and L.

Base-23 [ base-23 ]

Base 23 or triovigesimal numeral system is based on twenty-three. The twenty three symbols used are 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, E, F, G, H, I, J, K, L and M.

Base-24 [ base-24 ]

The base-24 system is a numeral system with 24 as its base. The symbols used in this system are 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, E, F, G, H, I, J, K, L, M, and N.

Base-25 [ base-25 ]

The base-25 system is a numeral system with 25 as its base. The symbols used in this system are 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, E, F, G, H, I, J, K, L, M, N and O.

Base-26 [ base-26 ]

A hexavigesimal numeral system has a base of twenty-six. The symbols used in this system are 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, E, F, G, H, I, J, K, L, M, N, O and P.

Base-27 [ base-27 ]

A septemvigesimal numeral system has a base of twenty-seven. The symbols used in this system are 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P and Q.

Base-28 [ base-28 ]

The base 28 numberal system is based on twenty-eight and uses 28 different symbols ( 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q and R.)

Base-29 [ base-29 ]

The base 29 numberal system is based on twenty-nine and uses 29 different symbols ( 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R and S.)

Base-3 [ base-3 ]

Ternay or trinary is the base-3 numeral system. Ternary requireds only three symbols: 0, 1 and 2.

Base-30 [ base-30 ]

Trigesimal or base 30 is a positional numeral system using 30 as the radix. Digits in this base can be represented using the Arabic numerals 0-9 and the Latin letters A-T.

Base-31 [ base-31 ]

Unotrigesimal or base 31 is a positional numeral system using 31 as the radix. Digits in this base can be represented using the Arabic numerals 0-9 and the Latin letters A-U.

Base-32 [ base-32 ]

Duotrigesimal or base-32 is a numeral system with 32 as its base. Digits in this base can be represented using Arabic numerals 0-9 and the Latin letters A-V.

Base-33 [ base-33 ]

Base 33 numeral system is based on 33 different symbols (number 0-9 and letter A-W).

Base-34 [ base-34 ]

Base 34 numeral system is based on 34 different symbols (number 0-9 and letter A-X).

Base-35 [ base-35 ]

Base 35 numeral system is based on 35 different symbols (number 0-9 and letter A-Y).

Base-36 [ base-36 ]

Base 36 or hexatridecimal is a positional numeral system using 36 as the radix. The choice of 36 is convenient in that the digits can be represented using the Arabic numerals 0-9 and the Latin letters A-Z.

Base-4 [ base-4 ]

Quaternary is the base-4 numeral system. It uses the digits 0, 1, 2 and 3 to represent any real number.

Base-5 [ base-5 ]

Quinary (base-5) is a numeral system with five as the base. The base five is started from 0-4.

Base-6 [ base-6 ]

Senary (base-6) is a numeral system with sex symbols (0, 1, 2, 3, 4, 5).

Base-7 [ base-7 ]

The septenary numeral system is the base-7 number system, and uses the digits 0-6.

Base-8 [ base-8 ]

Base-8 is equivalent to octal.

Base-9 [ base-9 ]

Nonary is a base-9 numeral system, typically using the digits 0-8.

Binary [ base-2 ]

The binary numeral system, or base-2 number system, represents numeric values using two symbols: 0 and 1.

Decimal [ base-10 ]

The decimal numeral system (also called base ten or occasionally denary) has ten as its base.

Hexadicimal [ base-16 ]

Hexadecimal (also base 16, or hex) is a positional numeral system with a radix, or base, of 16. It uses sixteen distinct symbols, most often the symbols 0-9 to represent values zero to nine, and A,B,C,D,E,F.

Octal [ base-8 ]

The octal numeral system, or oct for short, is the base-8 number system, and uses the digits 0 to 7