2's Complement / Two's Complement Calculator

I want to enter
Decimal Number:
Binary Number:
Twos Complement:

Two's complement is a mathematical operation on binary numbers.

Here is an example below:

  1111 1111                       255
− 0101 1111                     −  95
===========                     =====
  1010 0000  (ones' complement)   160
+         1                     +   1
===========                     =====
  1010 0001  (two's complement)   161

To calculate 2's Complement / Two's Complement, Select Decimal number and type a number, click "Calculate" button, the two's complement will displays below. At the same time, there will display the binary number of the decimal.

For example, type a decimal number 111, the binary number is 01101111, the two's complement is 10010001.

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