Signed: Binary -> Integer: 0011 0000 0000 0101 0001 1001 1001 1001 1001 1001 1001 1001 1001 1001 1001 0011 Signed Binary Number Converted and Written as a Decimal System Integer (in Base Ten)
The signed binary (in base two) 0011 0000 0000 0101 0001 1001 1001 1001 1001 1001 1001 1001 1001 1001 1001 0011(2) to an integer (with sign) in decimal system (in base ten) = ?
1. Is this a positive or a negative number?
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.
0011 0000 0000 0101 0001 1001 1001 1001 1001 1001 1001 1001 1001 1001 1001 0011 is the binary representation of a positive integer, on 64 bits (8 Bytes).
2. Construct the unsigned binary number.
Exclude the first bit (the leftmost), that is reserved for the sign:
0011 0000 0000 0101 0001 1001 1001 1001 1001 1001 1001 1001 1001 1001 1001 0011 = 011 0000 0000 0101 0001 1001 1001 1001 1001 1001 1001 1001 1001 1001 1001 0011
3. Map the unsigned binary number's digits versus the corresponding powers of 2 that their place value represent:
262
0 261
1 260
1 259
0 258
0 257
0 256
0 255
0 254
0 253
0 252
0 251
0 250
1 249
0 248
1 247
0 246
0 245
0 244
1 243
1 242
0 241
0 240
1 239
1 238
0 237
0 236
1 235
1 234
0 233
0 232
1 231
1 230
0 229
0 228
1 227
1 226
0 225
0 224
1 223
1 222
0 221
0 220
1 219
1 218
0 217
0 216
1 215
1 214
0 213
0 212
1 211
1 210
0 29
0 28
1 27
1 26
0 25
0 24
1 23
0 22
0 21
1 20
1
4. Multiply each bit by its corresponding power of 2 and add all the terms up.
011 0000 0000 0101 0001 1001 1001 1001 1001 1001 1001 1001 1001 1001 1001 0011(2) =
(0 × 262 + 1 × 261 + 1 × 260 + 0 × 259 + 0 × 258 + 0 × 257 + 0 × 256 + 0 × 255 + 0 × 254 + 0 × 253 + 0 × 252 + 0 × 251 + 1 × 250 + 0 × 249 + 1 × 248 + 0 × 247 + 0 × 246 + 0 × 245 + 1 × 244 + 1 × 243 + 0 × 242 + 0 × 241 + 1 × 240 + 1 × 239 + 0 × 238 + 0 × 237 + 1 × 236 + 1 × 235 + 0 × 234 + 0 × 233 + 1 × 232 + 1 × 231 + 0 × 230 + 0 × 229 + 1 × 228 + 1 × 227 + 0 × 226 + 0 × 225 + 1 × 224 + 1 × 223 + 0 × 222 + 0 × 221 + 1 × 220 + 1 × 219 + 0 × 218 + 0 × 217 + 1 × 216 + 1 × 215 + 0 × 214 + 0 × 213 + 1 × 212 + 1 × 211 + 0 × 210 + 0 × 29 + 1 × 28 + 1 × 27 + 0 × 26 + 0 × 25 + 1 × 24 + 0 × 23 + 0 × 22 + 1 × 21 + 1 × 20)(10) =
(0 + 2 305 843 009 213 693 952 + 1 152 921 504 606 846 976 + 0 + 0 + 0 + 0 + 0 + 0 + 0 + 0 + 0 + 1 125 899 906 842 624 + 0 + 281 474 976 710 656 + 0 + 0 + 0 + 17 592 186 044 416 + 8 796 093 022 208 + 0 + 0 + 1 099 511 627 776 + 549 755 813 888 + 0 + 0 + 68 719 476 736 + 34 359 738 368 + 0 + 0 + 4 294 967 296 + 2 147 483 648 + 0 + 0 + 268 435 456 + 134 217 728 + 0 + 0 + 16 777 216 + 8 388 608 + 0 + 0 + 1 048 576 + 524 288 + 0 + 0 + 65 536 + 32 768 + 0 + 0 + 4 096 + 2 048 + 0 + 0 + 256 + 128 + 0 + 0 + 16 + 0 + 0 + 2 + 1)(10) =
(2 305 843 009 213 693 952 + 1 152 921 504 606 846 976 + 1 125 899 906 842 624 + 281 474 976 710 656 + 17 592 186 044 416 + 8 796 093 022 208 + 1 099 511 627 776 + 549 755 813 888 + 68 719 476 736 + 34 359 738 368 + 4 294 967 296 + 2 147 483 648 + 268 435 456 + 134 217 728 + 16 777 216 + 8 388 608 + 1 048 576 + 524 288 + 65 536 + 32 768 + 4 096 + 2 048 + 256 + 128 + 16 + 2 + 1)(10) =
3 460 200 036 201 765 267(10)
5. If needed, adjust the sign of the integer number by the first digit (leftmost) of the signed binary:
0011 0000 0000 0101 0001 1001 1001 1001 1001 1001 1001 1001 1001 1001 1001 0011(2) = 3 460 200 036 201 765 267(10)
The number 0011 0000 0000 0101 0001 1001 1001 1001 1001 1001 1001 1001 1001 1001 1001 0011(2) converted from a signed binary (base two) and written as an integer in decimal system (base ten):
0011 0000 0000 0101 0001 1001 1001 1001 1001 1001 1001 1001 1001 1001 1001 0011(2) = 3 460 200 036 201 765 267(10)
Spaces were used to group digits: for binary, by 4, for decimal, by 3.
Convert signed binary numbers to integers in decimal system (in base ten)
The first bit (the leftmost) is reserved for the sign (1 = negative, 0 = positive) and it doesn't count when calculating the absolute value.
Binary number's length must be: 2, 4, 8, 16, 32, 64 - or else extra bits on 0 are 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.