Base Two to Base Ten: Unsigned Base Two Binary Number 10 0000 1000 1011 1101 1110 1010 1001 0101 0100 0001 1110 0000 0111 Converted and Written as a Base Ten Natural Number (Positive Integer, Without Sign), in Decimal System

Unsigned base two binary number 10 0000 1000 1011 1101 1110 1010 1001 0101 0100 0001 1110 0000 0111(2) converted and written as a base ten number

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

  • 253

    1
  • 252

    0
  • 251

    0
  • 250

    0
  • 249

    0
  • 248

    0
  • 247

    1
  • 246

    0
  • 245

    0
  • 244

    0
  • 243

    1
  • 242

    0
  • 241

    1
  • 240

    1
  • 239

    1
  • 238

    1
  • 237

    0
  • 236

    1
  • 235

    1
  • 234

    1
  • 233

    1
  • 232

    0
  • 231

    1
  • 230

    0
  • 229

    1
  • 228

    0
  • 227

    1
  • 226

    0
  • 225

    0
  • 224

    1
  • 223

    0
  • 222

    1
  • 221

    0
  • 220

    1
  • 219

    0
  • 218

    1
  • 217

    0
  • 216

    0
  • 215

    0
  • 214

    0
  • 213

    0
  • 212

    1
  • 211

    1
  • 210

    1
  • 29

    1
  • 28

    0
  • 27

    0
  • 26

    0
  • 25

    0
  • 24

    0
  • 23

    0
  • 22

    1
  • 21

    1
  • 20

    1

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

10 0000 1000 1011 1101 1110 1010 1001 0101 0100 0001 1110 0000 0111(2) =


(1 × 253 + 0 × 252 + 0 × 251 + 0 × 250 + 0 × 249 + 0 × 248 + 1 × 247 + 0 × 246 + 0 × 245 + 0 × 244 + 1 × 243 + 0 × 242 + 1 × 241 + 1 × 240 + 1 × 239 + 1 × 238 + 0 × 237 + 1 × 236 + 1 × 235 + 1 × 234 + 1 × 233 + 0 × 232 + 1 × 231 + 0 × 230 + 1 × 229 + 0 × 228 + 1 × 227 + 0 × 226 + 0 × 225 + 1 × 224 + 0 × 223 + 1 × 222 + 0 × 221 + 1 × 220 + 0 × 219 + 1 × 218 + 0 × 217 + 0 × 216 + 0 × 215 + 0 × 214 + 0 × 213 + 1 × 212 + 1 × 211 + 1 × 210 + 1 × 29 + 0 × 28 + 0 × 27 + 0 × 26 + 0 × 25 + 0 × 24 + 0 × 23 + 1 × 22 + 1 × 21 + 1 × 20)(10) =


(9 007 199 254 740 992 + 0 + 0 + 0 + 0 + 0 + 140 737 488 355 328 + 0 + 0 + 0 + 8 796 093 022 208 + 0 + 2 199 023 255 552 + 1 099 511 627 776 + 549 755 813 888 + 274 877 906 944 + 0 + 68 719 476 736 + 34 359 738 368 + 17 179 869 184 + 8 589 934 592 + 0 + 2 147 483 648 + 0 + 536 870 912 + 0 + 134 217 728 + 0 + 0 + 16 777 216 + 0 + 4 194 304 + 0 + 1 048 576 + 0 + 262 144 + 0 + 0 + 0 + 0 + 0 + 4 096 + 2 048 + 1 024 + 512 + 0 + 0 + 0 + 0 + 0 + 0 + 4 + 2 + 1)(10) =


(9 007 199 254 740 992 + 140 737 488 355 328 + 8 796 093 022 208 + 2 199 023 255 552 + 1 099 511 627 776 + 549 755 813 888 + 274 877 906 944 + 68 719 476 736 + 34 359 738 368 + 17 179 869 184 + 8 589 934 592 + 2 147 483 648 + 536 870 912 + 134 217 728 + 16 777 216 + 4 194 304 + 1 048 576 + 262 144 + 4 096 + 2 048 + 1 024 + 512 + 4 + 2 + 1)(10) =


9 160 987 694 603 783(10)

The number 10 0000 1000 1011 1101 1110 1010 1001 0101 0100 0001 1110 0000 0111(2) converted from an unsigned binary (in base 2) and written as a positive integer (with no sign) in decimal system (in base ten):
10 0000 1000 1011 1101 1110 1010 1001 0101 0100 0001 1110 0000 0111(2) = 9 160 987 694 603 783(10)

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

How to convert unsigned binary numbers from binary system to decimal? Simply convert from base two to base ten.

To understand how to convert a number from base two to base ten, the easiest way is to do it through an example - convert the number from base two, 101 0011(2), to base ten:

  • 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, increasing each corresponding power of 2 by exactly one unit each time we move to the left:
  • powers of 2: 6 5 4 3 2 1 0
    digits: 1 0 1 0 0 1 1
  • 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:

    101 0011(2) =


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


    (64 + 0 + 16 + 0 + 0 + 2 + 1)(10) =


    (64 + 16 + 2 + 1)(10) =


    83(10)

  • Binary unsigned number (base 2), 101 0011(2) = 83(10), unsigned positive integer in base 10