Signed binary number 0000 1001 1110 0111 0000 1001 0010 0001 converted to an integer in base ten

Signed binary 0000 1001 1110 0111 0000 1001 0010 0001(2) to an integer in decimal system (in base 10) = ?

1. Is this a positive or a negative number?


In a signed binary, first bit (the leftmost) is reserved for the sign, 1 = negative, 0 = positive. This bit does not count when calculating the absolute value.

0000 1001 1110 0111 0000 1001 0010 0001 is the binary representation of a positive integer, on 32 bits (4 Bytes).


2. Construct the unsigned binary number, exclude the first bit (the leftmost), that is reserved for the sign:

0000 1001 1110 0111 0000 1001 0010 0001 = 000 1001 1110 0111 0000 1001 0010 0001

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

      1
    • 226

      0
    • 225

      0
    • 224

      1
    • 223

      1
    • 222

      1
    • 221

      1
    • 220

      0
    • 219

      0
    • 218

      1
    • 217

      1
    • 216

      1
    • 215

      0
    • 214

      0
    • 213

      0
    • 212

      0
    • 211

      1
    • 210

      0
    • 29

      0
    • 28

      1
    • 27

      0
    • 26

      0
    • 25

      1
    • 24

      0
    • 23

      0
    • 22

      0
    • 21

      0
    • 20

      1

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

000 1001 1110 0111 0000 1001 0010 0001(2) =


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


(0 + 0 + 0 + 134 217 728 + 0 + 0 + 16 777 216 + 8 388 608 + 4 194 304 + 2 097 152 + 0 + 0 + 262 144 + 131 072 + 65 536 + 0 + 0 + 0 + 0 + 2 048 + 0 + 0 + 256 + 0 + 0 + 32 + 0 + 0 + 0 + 0 + 1)(10) =


(134 217 728 + 16 777 216 + 8 388 608 + 4 194 304 + 2 097 152 + 262 144 + 131 072 + 65 536 + 2 048 + 256 + 32 + 1)(10) =


166 136 097(10)

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

0000 1001 1110 0111 0000 1001 0010 0001(2) = 166 136 097(10)

Number 0000 1001 1110 0111 0000 1001 0010 0001(2) converted from signed binary to an integer in decimal system (in base 10):
0000 1001 1110 0111 0000 1001 0010 0001(2) = 166 136 097(10)

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


More operations of this kind:

0000 1001 1110 0111 0000 1001 0010 0000 = ?

0000 1001 1110 0111 0000 1001 0010 0010 = ?


Convert signed binary numbers to integers in decimal system (base 10)

First bit (the leftmost) is reserved for the sign, 1 = negative, 0 = positive. This bit does not count when calculating the absolute value.

Entered binary number length must be: 2, 4, 8, 16, 32, or 64 - otherwise extra bits on 0 will be added in front (to the left).

How to convert a signed binary number to an integer in base ten:

1) Construct the unsigned binary number: exclude the first bit (the leftmost); this bit is reserved for the sign, 1 = negative, 0 = positive and does not count when calculating the absolute value (without sign).

2) Multiply each bit of the binary number by its corresponding power of 2 that its place value represents.

3) Add all the terms up to get the positive integer number in base ten.

4) Adjust the sign of the integer number by the first bit of the initial binary number.

Latest signed binary numbers converted to signed integers in decimal system (base ten)

0000 1001 1110 0111 0000 1001 0010 0001 = 166,136,097 Mar 08 11:32 UTC (GMT)
1001 0100 0101 0111 = -5,207 Mar 08 11:32 UTC (GMT)
1011 0001 1001 1111 1111 1111 1110 0011 = -832,569,315 Mar 08 11:32 UTC (GMT)
0000 1100 0111 1010 = 3,194 Mar 08 11:32 UTC (GMT)
0000 0000 0000 0000 1100 0011 0100 0011 = 49,987 Mar 08 11:32 UTC (GMT)
0000 0000 0000 0001 0000 0000 0010 1001 = 65,577 Mar 08 11:31 UTC (GMT)
1010 0100 1001 1110 = -9,374 Mar 08 11:31 UTC (GMT)
0000 0000 0000 0010 0100 0100 1100 0111 = 148,679 Mar 08 11:31 UTC (GMT)
0000 0100 0100 0100 = 1,092 Mar 08 11:31 UTC (GMT)
1100 0000 0000 0000 0000 0000 0100 0110 = -1,073,741,894 Mar 08 11:31 UTC (GMT)
0001 1111 0101 0010 0001 0011 1110 1110 = 525,472,750 Mar 08 11:30 UTC (GMT)
0010 1001 1101 0100 1000 0000 1101 0111 = 701,792,471 Mar 08 11:30 UTC (GMT)
1000 1011 0111 1111 1111 1111 1111 1111 1111 1111 1111 1111 1111 1111 1111 0111 = -828,662,331,436,171,255 Mar 08 11:30 UTC (GMT)
All the converted signed binary numbers to integers 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