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One's Complement Calculator
Input the binary number in the one’s (1’s) complement calculator and hit the ‘calculate’ button.
Examples:
Click to calculate one's complementBinary (8-bit)
10001011
10001011
Binary (4-bit)
1001
1001
Binary (8-bit)
10010000
10010000
Binary (8-bit)
11111011
11111011
Decimal (8-bit)
123
123
Decimal (16-bit)
30231
30231
1s Complement Calculator
One's complement calculator is an online tool for converting binary numbers into 1's complement. It finds the complement of a given binary number.
This 1's complement calculator also provides a comprehensive step-wise process of finding 1s complement.
What is one’s complement?
One’s complement can be defined as the inverse of a binary number. By inverse, it does not mean adding 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.
How to find one’s complement?
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?
- 0101
- 1111
- 1001 1001
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
One’s complement table
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.
References
- Wikimedia Foundation. (2022, July 4). One's complement. Wikipedia.