Input the binary number in the one’s (1’s) complement calculator and hit the ‘calculate’ button.
Ones complement calculator is an online tool for converting binary numbers into 1's complement. It finds the complement of a given binary number.
This calculator also provides a comprehensive step-wise process of finding 1s complement. You can enter up to 8-bit binary numbers.
Note: Do not add space between digits of 8-bit numbers.
One’s complement can be defined as the inverse of a binary number. By inverse, it does not mean to add negative signs like decimal numbers (e.g inverse of 4 is -4).
In binary numbers since there are only 2 digits, both of these digits are 1’s complements of each other. 1 is the complement of 0 and 0 is the complement of 1.
To find 1’s complement of any binary number replace 0’s with 1’s and vice versa. See this example.
Example:
What is the one’s complement of the following binary numbers?
Solution:
1st number:
Binary number = 0101
1’s complement = 1010
2nd number:
Binary number = 1111
1’s complement = 0000
3rd number:
Binary number = 1001 1001
1’s complement = 0110 0110
| Decimal number | Binary number | 1’s complement |
| 1 | 0001 | 1110 |
| 2 | 0010 | 1101 |
| 3 | 0011 | 1100 |
| 4 | 0100 | 1011 |
| 5 | 0101 | 1010 |
| 6 | 0110 | 1001 |
| 7 | 0111 | 1000 |
| 8 | 1000 | 0111 |
| 9 | 1001 | 0110 |
| 10 | 1010 | 0101 |
Use 2’s complement calculator if you want to find two's complement after calculating one's complement of a binary number.
