Number Base Converter

Convert between binary, octal, decimal, and hexadecimal number systems

Input Base

Decimal Number

Only 0-9 allowed

Example Numbers

Decimal	Binary	Octal	Hexadecimal
0	0000	0	0
1	0001	1	1
2	0010	2	2
3	0011	3	3
4	0100	4	4
5	0101	5	5
6	0110	6	6
7	0111	7	7
8	1000	10	8
9	1001	11	9
10	1010	12	A
11	1011	13	B
12	1100	14	C
13	1101	15	D
14	1110	16	E
15	1111	17	F

Base 2, uses only 0 and 1. The number system used internally by computers.

Base 8, uses digits 0-7. Commonly used for Unix file permissions.

Base 10, uses digits 0-9. The number system used in daily life by humans.

Base 16, uses digits 0-9 and A-F. Commonly used for color codes and memory addresses.

Division method: Continuously divide by the target base, arrange remainders in reverse order.

Positional notation: Multiply each digit by the corresponding power of the base, then sum.

Three binary digits correspond to one octal digit (2³ = 8).

Four binary digits correspond to one hexadecimal digit (2⁴ = 16).

Perform arithmetic operations in binary

Perform arithmetic operations in hexadecimal

Advanced mathematical calculations

Convert between different units

Calculate percentages and ratios

Simple arithmetic calculations