# Signed binary two's complement number 1011 1010 1000 1010 converted to decimal system (base ten) signed integer

• 215

0
• 214

1
• 213

0
• 212

0
• 211

0
• 210

1
• 29

0
• 28

1
• 27

0
• 26

1
• 25

1
• 24

1
• 23

0
• 22

1
• 21

1
• 20

0

## Latest binary numbers in two's complement representation converted to signed integers in decimal system (base ten)

 1011 1010 1000 1010 = -17,782 Jan 21 01:10 UTC (GMT) 1111 0110 1100 1000 = -2,360 Jan 21 01:09 UTC (GMT) 0000 0011 1001 0101 = 917 Jan 21 01:07 UTC (GMT) 0000 0001 0111 1001 = 377 Jan 21 01:06 UTC (GMT) 0000 0000 0000 0011 1111 1111 1110 1101 = 262,125 Jan 21 01:06 UTC (GMT) 1001 0100 1110 1110 1110 1101 0110 1010 1110 1111 1110 0011 1111 0101 1101 1000 = -7,714,968,068,092,070,440 Jan 21 01:04 UTC (GMT) 10 = -2 Jan 21 01:03 UTC (GMT) 1111 0001 1011 1111 = -3,649 Jan 21 01:03 UTC (GMT) 0001 1111 1111 1111 1111 1111 1111 0010 = 536,870,898 Jan 21 01:01 UTC (GMT) 0110 1001 1011 1110 = 27,070 Jan 21 01:01 UTC (GMT) 1111 1010 1011 0001 = -1,359 Jan 21 01:01 UTC (GMT) 0000 1100 1100 0111 1011 0011 0011 1001 1011 1111 1110 0011 1100 0001 1111 1100 = 920,901,709,434,438,140 Jan 21 01:01 UTC (GMT) 0000 0000 1100 0010 1001 0000 1010 0100 0110 0000 1100 0110 1001 0000 1001 0111 = 54,765,181,154,529,431 Jan 21 01:01 UTC (GMT) All the converted signed binary two's complement numbers

## How to convert signed binary numbers in two's complement representation from binary system to decimal

### To understand how to convert a signed binary number in two's complement representation from the binary system to decimal (base ten), the easiest way is to do it by an example - convert binary, 1101 1110, to base ten:

• In a signed binary two's complement, first bit (leftmost) indicates the sign, 1 = negative, 0 = positive. The first bit is 1, so our number is negative.
• Get the signed binary representation in one's complement, subtract 1 from the initial number:
1101 1110 - 1 = 1101 1101
• Get the binary representation of the positive number, flip all the bits in the signed binary one's complement representation (reversing the digits) - replace the bits set on 1 with 0s and the bits on 0 with 1s:
!(1101 1101) = 0010 0010
• Write bellow the positive binary number representation in base two, and above each bit that makes up the binary number write the corresponding power of 2 (numeral base) that its place value represents, starting with zero, from the right of the number (rightmost bit), walking to the left of the number, increasing each corresonding power of 2 by exactly one unit:
•  powers of 2: 7 6 5 4 3 2 1 0 digits: 0 0 1 0 0 0 1 0
• Build the representation of the positive number in base 10, by taking each digit of the binary number, multiplying it by the corresponding power of 2 and then adding all the terms up: