Signed: Binary ↘ Integer: 1000 0000 0000 0000 1010 1010 1010 1110 Signed Binary Number Converted and Written as a Decimal System Integer (in Base Ten)

The signed binary (in base two) 1000 0000 0000 0000 1010 1010 1010 1110(2) to an integer (with sign) in decimal system (in base ten) = ?

1. Is this a positive or a negative number?

1000 0000 0000 0000 1010 1010 1010 1110 is the binary representation of a negative integer, on 32 bits (4 Bytes).


In a signed binary, the first bit (the leftmost) is reserved for the sign,

1 = negative, 0 = positive. This bit does not count when calculating the absolute value.


2. Construct the unsigned binary number.

Exclude the first bit (the leftmost), that is reserved for the sign:


1000 0000 0000 0000 1010 1010 1010 1110 = 000 0000 0000 0000 1010 1010 1010 1110


3. Map the unsigned binary number's digits versus the corresponding powers of 2 that their place value represent:

  • 230

    0
  • 229

    0
  • 228

    0
  • 227

    0
  • 226

    0
  • 225

    0
  • 224

    0
  • 223

    0
  • 222

    0
  • 221

    0
  • 220

    0
  • 219

    0
  • 218

    0
  • 217

    0
  • 216

    0
  • 215

    1
  • 214

    0
  • 213

    1
  • 212

    0
  • 211

    1
  • 210

    0
  • 29

    1
  • 28

    0
  • 27

    1
  • 26

    0
  • 25

    1
  • 24

    0
  • 23

    1
  • 22

    1
  • 21

    1
  • 20

    0

4. Multiply each bit by its corresponding power of 2 and add all the terms up.

000 0000 0000 0000 1010 1010 1010 1110(2) =


(0 × 230 + 0 × 229 + 0 × 228 + 0 × 227 + 0 × 226 + 0 × 225 + 0 × 224 + 0 × 223 + 0 × 222 + 0 × 221 + 0 × 220 + 0 × 219 + 0 × 218 + 0 × 217 + 0 × 216 + 1 × 215 + 0 × 214 + 1 × 213 + 0 × 212 + 1 × 211 + 0 × 210 + 1 × 29 + 0 × 28 + 1 × 27 + 0 × 26 + 1 × 25 + 0 × 24 + 1 × 23 + 1 × 22 + 1 × 21 + 0 × 20)(10) =


(0 + 0 + 0 + 0 + 0 + 0 + 0 + 0 + 0 + 0 + 0 + 0 + 0 + 0 + 0 + 32 768 + 0 + 8 192 + 0 + 2 048 + 0 + 512 + 0 + 128 + 0 + 32 + 0 + 8 + 4 + 2 + 0)(10) =


(32 768 + 8 192 + 2 048 + 512 + 128 + 32 + 8 + 4 + 2)(10) =


43 694(10)

5. If needed, adjust the sign of the integer number by the first digit (leftmost) of the signed binary:

1000 0000 0000 0000 1010 1010 1010 1110(2) = -43 694(10)

The number 1000 0000 0000 0000 1010 1010 1010 1110(2) converted from a signed binary (base two) and written as an integer in decimal system (base ten):
1000 0000 0000 0000 1010 1010 1010 1110(2) = -43 694(10)

Spaces were used to group digits: for binary, by 4, for decimal, by 3.

The latest signed binary numbers converted and written as signed integers in decimal system (in base ten)

Convert the signed binary number 0001 0100 1010 0101 0010 1001 1011 0010, write it as a decimal system integer number (written in base ten) Jun 17 16:35 UTC (GMT)
Convert the signed binary number 0000 0000 0001 0101 1100 1100 1011 0000, write it as a decimal system integer number (written in base ten) Jun 17 16:35 UTC (GMT)
Convert the signed binary number 1100 0001 1111 1111 0111 1100 0011 1010, write it as a decimal system integer number (written in base ten) Jun 17 16:35 UTC (GMT)
Convert the signed binary number 1000 0010 0000 1000 0000 0000 1000 0001, write it as a decimal system integer number (written in base ten) Jun 17 16:35 UTC (GMT)
Convert the signed binary number 1000 0000 0000 0000 0001 0011 0001 1001, write it as a decimal system integer number (written in base ten) Jun 17 16:35 UTC (GMT)
Convert the signed binary number 0000 0000 0000 0111 1111 1100 0110 1110, write it as a decimal system integer number (written in base ten) Jun 17 16:35 UTC (GMT)
Convert the signed binary number 0000 1111 1000 0101 1000 0101 1111 1111, write it as a decimal system integer number (written in base ten) Jun 17 16:35 UTC (GMT)
Convert the signed binary number 1001 0001 1110 0001 0001 0110 1011 0101, write it as a decimal system integer number (written in base ten) Jun 17 16:35 UTC (GMT)
Convert the signed binary number 0000 0000 0000 1000 1101 0111 0100 0000, write it as a decimal system integer number (written in base ten) Jun 17 16:35 UTC (GMT)
Convert the signed binary number 0000 0000 0000 0000 0000 0000 0000 0001 1001 1111 1111 1111 1111 1111 1110 0101, write it as a decimal system integer number (written in base ten) Jun 17 16:35 UTC (GMT)
All the signed binary numbers converted to integers in decimal system (written in base ten)

How to convert signed binary numbers from binary system to decimal (base ten)

To understand how to convert a signed binary number from binary system to decimal (base ten), the easiest way is to do it through an example - convert the binary number, 1001 1110, to base ten:

  • In a signed binary, the first bit (leftmost) is reserved for the sign, 1 = negative, 0 = positive. This bit does not count when calculating the absolute value (value without sign). The first bit is 1, so our number is negative.
  • Write bellow the binary number 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 and increasing each corresonding power of 2 by exactly one unit, but ignoring the very first bit (the leftmost, the one representing the sign):
  • powers of 2:   6 5 4 3 2 1 0
    digits: 1 0 0 1 1 1 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, but also taking care of the number sign:

    1001 1110 =


    - (0 × 26 + 0 × 25 + 1 × 24 + 1 × 23 + 1 × 22 + 1 × 21 + 0 × 20)(10) =


    - (0 + 0 + 16 + 8 + 4 + 2 + 0)(10) =


    - (16 + 8 + 4 + 2)(10) =


    -30(10)

  • Binary signed number, 1001 1110 = -30(10), signed negative integer in base 10