Signed: Binary ↘ Integer: 0010 0100 1010 0011 1111 1111 1101 1010 Signed Binary Number Converted and Written as a Decimal System Integer (in Base Ten)

The signed binary (in base two) 0010 0100 1010 0011 1111 1111 1101 1010(2) to an integer (with sign) in decimal system (in base ten) = ?

1. Is this a positive or a negative number?

0010 0100 1010 0011 1111 1111 1101 1010 is the binary representation of a positive 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:


0010 0100 1010 0011 1111 1111 1101 1010 = 010 0100 1010 0011 1111 1111 1101 1010


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

  • 230

    0
  • 229

    1
  • 228

    0
  • 227

    0
  • 226

    1
  • 225

    0
  • 224

    0
  • 223

    1
  • 222

    0
  • 221

    1
  • 220

    0
  • 219

    0
  • 218

    0
  • 217

    1
  • 216

    1
  • 215

    1
  • 214

    1
  • 213

    1
  • 212

    1
  • 211

    1
  • 210

    1
  • 29

    1
  • 28

    1
  • 27

    1
  • 26

    1
  • 25

    0
  • 24

    1
  • 23

    1
  • 22

    0
  • 21

    1
  • 20

    0

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

010 0100 1010 0011 1111 1111 1101 1010(2) =


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


(0 + 536 870 912 + 0 + 0 + 67 108 864 + 0 + 0 + 8 388 608 + 0 + 2 097 152 + 0 + 0 + 0 + 131 072 + 65 536 + 32 768 + 16 384 + 8 192 + 4 096 + 2 048 + 1 024 + 512 + 256 + 128 + 64 + 0 + 16 + 8 + 0 + 2 + 0)(10) =


(536 870 912 + 67 108 864 + 8 388 608 + 2 097 152 + 131 072 + 65 536 + 32 768 + 16 384 + 8 192 + 4 096 + 2 048 + 1 024 + 512 + 256 + 128 + 64 + 16 + 8 + 2)(10) =


614 727 642(10)

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

0010 0100 1010 0011 1111 1111 1101 1010(2) = 614 727 642(10)

The number 0010 0100 1010 0011 1111 1111 1101 1010(2) converted from a signed binary (base two) and written as an integer in decimal system (base ten):
0010 0100 1010 0011 1111 1111 1101 1010(2) = 614 727 642(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 0000 0000 0100 0000 0001 0101 1101 1101, write it as a decimal system integer number (written in base ten) Jun 17 15:55 UTC (GMT)
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Convert the signed binary number 0000 0000 0010 0011 1101 1101 0011 0101, write it as a decimal system integer number (written in base ten) Jun 17 15:55 UTC (GMT)
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Convert the signed binary number 0001 0100 0010 1010 0000 0000 0110 1000, write it as a decimal system integer number (written in base ten) Jun 17 15:55 UTC (GMT)
Convert the signed binary number 0100 0001 1001 0000 0000 0000 0001 0000, write it as a decimal system integer number (written in base ten) Jun 17 15:55 UTC (GMT)
Convert the signed binary number 0111 0000 0110 1111 1111 1111 1110 0111, write it as a decimal system integer number (written in base ten) Jun 17 15:55 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