0.000 000 000 003 634 999 999 999 999 758 261 057 032 300 678 335 152 987 73 Converted to 64 Bit Double Precision IEEE 754 Binary Floating Point Representation Standard

Convert decimal 0.000 000 000 003 634 999 999 999 999 758 261 057 032 300 678 335 152 987 73(10) to 64 bit double precision IEEE 754 binary floating point representation standard (1 bit for sign, 11 bits for exponent, 52 bits for mantissa)

What are the steps to convert decimal number
0.000 000 000 003 634 999 999 999 999 758 261 057 032 300 678 335 152 987 73(10) to 64 bit double precision IEEE 754 binary floating point representation (1 bit for sign, 11 bits for exponent, 52 bits for mantissa)

1. First, convert to binary (in base 2) the integer part: 0.
Divide the number repeatedly by 2.

Keep track of each remainder.

We stop when we get a quotient that is equal to zero.


  • division = quotient + remainder;
  • 0 ÷ 2 = 0 + 0;

2. Construct the base 2 representation of the integer part of the number.

Take all the remainders starting from the bottom of the list constructed above.

0(10) =

0(2)


3. Convert to binary (base 2) the fractional part: 0.000 000 000 003 634 999 999 999 999 758 261 057 032 300 678 335 152 987 73.

Multiply it repeatedly by 2.

Keep track of each integer part of the results.

Stop when we get a fractional part that is equal to zero.


  • #) multiplying = integer + fractional part;
  • 1) 0.000 000 000 003 634 999 999 999 999 758 261 057 032 300 678 335 152 987 73 × 2 = 0 + 0.000 000 000 007 269 999 999 999 999 516 522 114 064 601 356 670 305 975 46;
  • 2) 0.000 000 000 007 269 999 999 999 999 516 522 114 064 601 356 670 305 975 46 × 2 = 0 + 0.000 000 000 014 539 999 999 999 999 033 044 228 129 202 713 340 611 950 92;
  • 3) 0.000 000 000 014 539 999 999 999 999 033 044 228 129 202 713 340 611 950 92 × 2 = 0 + 0.000 000 000 029 079 999 999 999 998 066 088 456 258 405 426 681 223 901 84;
  • 4) 0.000 000 000 029 079 999 999 999 998 066 088 456 258 405 426 681 223 901 84 × 2 = 0 + 0.000 000 000 058 159 999 999 999 996 132 176 912 516 810 853 362 447 803 68;
  • 5) 0.000 000 000 058 159 999 999 999 996 132 176 912 516 810 853 362 447 803 68 × 2 = 0 + 0.000 000 000 116 319 999 999 999 992 264 353 825 033 621 706 724 895 607 36;
  • 6) 0.000 000 000 116 319 999 999 999 992 264 353 825 033 621 706 724 895 607 36 × 2 = 0 + 0.000 000 000 232 639 999 999 999 984 528 707 650 067 243 413 449 791 214 72;
  • 7) 0.000 000 000 232 639 999 999 999 984 528 707 650 067 243 413 449 791 214 72 × 2 = 0 + 0.000 000 000 465 279 999 999 999 969 057 415 300 134 486 826 899 582 429 44;
  • 8) 0.000 000 000 465 279 999 999 999 969 057 415 300 134 486 826 899 582 429 44 × 2 = 0 + 0.000 000 000 930 559 999 999 999 938 114 830 600 268 973 653 799 164 858 88;
  • 9) 0.000 000 000 930 559 999 999 999 938 114 830 600 268 973 653 799 164 858 88 × 2 = 0 + 0.000 000 001 861 119 999 999 999 876 229 661 200 537 947 307 598 329 717 76;
  • 10) 0.000 000 001 861 119 999 999 999 876 229 661 200 537 947 307 598 329 717 76 × 2 = 0 + 0.000 000 003 722 239 999 999 999 752 459 322 401 075 894 615 196 659 435 52;
  • 11) 0.000 000 003 722 239 999 999 999 752 459 322 401 075 894 615 196 659 435 52 × 2 = 0 + 0.000 000 007 444 479 999 999 999 504 918 644 802 151 789 230 393 318 871 04;
  • 12) 0.000 000 007 444 479 999 999 999 504 918 644 802 151 789 230 393 318 871 04 × 2 = 0 + 0.000 000 014 888 959 999 999 999 009 837 289 604 303 578 460 786 637 742 08;
  • 13) 0.000 000 014 888 959 999 999 999 009 837 289 604 303 578 460 786 637 742 08 × 2 = 0 + 0.000 000 029 777 919 999 999 998 019 674 579 208 607 156 921 573 275 484 16;
  • 14) 0.000 000 029 777 919 999 999 998 019 674 579 208 607 156 921 573 275 484 16 × 2 = 0 + 0.000 000 059 555 839 999 999 996 039 349 158 417 214 313 843 146 550 968 32;
  • 15) 0.000 000 059 555 839 999 999 996 039 349 158 417 214 313 843 146 550 968 32 × 2 = 0 + 0.000 000 119 111 679 999 999 992 078 698 316 834 428 627 686 293 101 936 64;
  • 16) 0.000 000 119 111 679 999 999 992 078 698 316 834 428 627 686 293 101 936 64 × 2 = 0 + 0.000 000 238 223 359 999 999 984 157 396 633 668 857 255 372 586 203 873 28;
  • 17) 0.000 000 238 223 359 999 999 984 157 396 633 668 857 255 372 586 203 873 28 × 2 = 0 + 0.000 000 476 446 719 999 999 968 314 793 267 337 714 510 745 172 407 746 56;
  • 18) 0.000 000 476 446 719 999 999 968 314 793 267 337 714 510 745 172 407 746 56 × 2 = 0 + 0.000 000 952 893 439 999 999 936 629 586 534 675 429 021 490 344 815 493 12;
  • 19) 0.000 000 952 893 439 999 999 936 629 586 534 675 429 021 490 344 815 493 12 × 2 = 0 + 0.000 001 905 786 879 999 999 873 259 173 069 350 858 042 980 689 630 986 24;
  • 20) 0.000 001 905 786 879 999 999 873 259 173 069 350 858 042 980 689 630 986 24 × 2 = 0 + 0.000 003 811 573 759 999 999 746 518 346 138 701 716 085 961 379 261 972 48;
  • 21) 0.000 003 811 573 759 999 999 746 518 346 138 701 716 085 961 379 261 972 48 × 2 = 0 + 0.000 007 623 147 519 999 999 493 036 692 277 403 432 171 922 758 523 944 96;
  • 22) 0.000 007 623 147 519 999 999 493 036 692 277 403 432 171 922 758 523 944 96 × 2 = 0 + 0.000 015 246 295 039 999 998 986 073 384 554 806 864 343 845 517 047 889 92;
  • 23) 0.000 015 246 295 039 999 998 986 073 384 554 806 864 343 845 517 047 889 92 × 2 = 0 + 0.000 030 492 590 079 999 997 972 146 769 109 613 728 687 691 034 095 779 84;
  • 24) 0.000 030 492 590 079 999 997 972 146 769 109 613 728 687 691 034 095 779 84 × 2 = 0 + 0.000 060 985 180 159 999 995 944 293 538 219 227 457 375 382 068 191 559 68;
  • 25) 0.000 060 985 180 159 999 995 944 293 538 219 227 457 375 382 068 191 559 68 × 2 = 0 + 0.000 121 970 360 319 999 991 888 587 076 438 454 914 750 764 136 383 119 36;
  • 26) 0.000 121 970 360 319 999 991 888 587 076 438 454 914 750 764 136 383 119 36 × 2 = 0 + 0.000 243 940 720 639 999 983 777 174 152 876 909 829 501 528 272 766 238 72;
  • 27) 0.000 243 940 720 639 999 983 777 174 152 876 909 829 501 528 272 766 238 72 × 2 = 0 + 0.000 487 881 441 279 999 967 554 348 305 753 819 659 003 056 545 532 477 44;
  • 28) 0.000 487 881 441 279 999 967 554 348 305 753 819 659 003 056 545 532 477 44 × 2 = 0 + 0.000 975 762 882 559 999 935 108 696 611 507 639 318 006 113 091 064 954 88;
  • 29) 0.000 975 762 882 559 999 935 108 696 611 507 639 318 006 113 091 064 954 88 × 2 = 0 + 0.001 951 525 765 119 999 870 217 393 223 015 278 636 012 226 182 129 909 76;
  • 30) 0.001 951 525 765 119 999 870 217 393 223 015 278 636 012 226 182 129 909 76 × 2 = 0 + 0.003 903 051 530 239 999 740 434 786 446 030 557 272 024 452 364 259 819 52;
  • 31) 0.003 903 051 530 239 999 740 434 786 446 030 557 272 024 452 364 259 819 52 × 2 = 0 + 0.007 806 103 060 479 999 480 869 572 892 061 114 544 048 904 728 519 639 04;
  • 32) 0.007 806 103 060 479 999 480 869 572 892 061 114 544 048 904 728 519 639 04 × 2 = 0 + 0.015 612 206 120 959 998 961 739 145 784 122 229 088 097 809 457 039 278 08;
  • 33) 0.015 612 206 120 959 998 961 739 145 784 122 229 088 097 809 457 039 278 08 × 2 = 0 + 0.031 224 412 241 919 997 923 478 291 568 244 458 176 195 618 914 078 556 16;
  • 34) 0.031 224 412 241 919 997 923 478 291 568 244 458 176 195 618 914 078 556 16 × 2 = 0 + 0.062 448 824 483 839 995 846 956 583 136 488 916 352 391 237 828 157 112 32;
  • 35) 0.062 448 824 483 839 995 846 956 583 136 488 916 352 391 237 828 157 112 32 × 2 = 0 + 0.124 897 648 967 679 991 693 913 166 272 977 832 704 782 475 656 314 224 64;
  • 36) 0.124 897 648 967 679 991 693 913 166 272 977 832 704 782 475 656 314 224 64 × 2 = 0 + 0.249 795 297 935 359 983 387 826 332 545 955 665 409 564 951 312 628 449 28;
  • 37) 0.249 795 297 935 359 983 387 826 332 545 955 665 409 564 951 312 628 449 28 × 2 = 0 + 0.499 590 595 870 719 966 775 652 665 091 911 330 819 129 902 625 256 898 56;
  • 38) 0.499 590 595 870 719 966 775 652 665 091 911 330 819 129 902 625 256 898 56 × 2 = 0 + 0.999 181 191 741 439 933 551 305 330 183 822 661 638 259 805 250 513 797 12;
  • 39) 0.999 181 191 741 439 933 551 305 330 183 822 661 638 259 805 250 513 797 12 × 2 = 1 + 0.998 362 383 482 879 867 102 610 660 367 645 323 276 519 610 501 027 594 24;
  • 40) 0.998 362 383 482 879 867 102 610 660 367 645 323 276 519 610 501 027 594 24 × 2 = 1 + 0.996 724 766 965 759 734 205 221 320 735 290 646 553 039 221 002 055 188 48;
  • 41) 0.996 724 766 965 759 734 205 221 320 735 290 646 553 039 221 002 055 188 48 × 2 = 1 + 0.993 449 533 931 519 468 410 442 641 470 581 293 106 078 442 004 110 376 96;
  • 42) 0.993 449 533 931 519 468 410 442 641 470 581 293 106 078 442 004 110 376 96 × 2 = 1 + 0.986 899 067 863 038 936 820 885 282 941 162 586 212 156 884 008 220 753 92;
  • 43) 0.986 899 067 863 038 936 820 885 282 941 162 586 212 156 884 008 220 753 92 × 2 = 1 + 0.973 798 135 726 077 873 641 770 565 882 325 172 424 313 768 016 441 507 84;
  • 44) 0.973 798 135 726 077 873 641 770 565 882 325 172 424 313 768 016 441 507 84 × 2 = 1 + 0.947 596 271 452 155 747 283 541 131 764 650 344 848 627 536 032 883 015 68;
  • 45) 0.947 596 271 452 155 747 283 541 131 764 650 344 848 627 536 032 883 015 68 × 2 = 1 + 0.895 192 542 904 311 494 567 082 263 529 300 689 697 255 072 065 766 031 36;
  • 46) 0.895 192 542 904 311 494 567 082 263 529 300 689 697 255 072 065 766 031 36 × 2 = 1 + 0.790 385 085 808 622 989 134 164 527 058 601 379 394 510 144 131 532 062 72;
  • 47) 0.790 385 085 808 622 989 134 164 527 058 601 379 394 510 144 131 532 062 72 × 2 = 1 + 0.580 770 171 617 245 978 268 329 054 117 202 758 789 020 288 263 064 125 44;
  • 48) 0.580 770 171 617 245 978 268 329 054 117 202 758 789 020 288 263 064 125 44 × 2 = 1 + 0.161 540 343 234 491 956 536 658 108 234 405 517 578 040 576 526 128 250 88;
  • 49) 0.161 540 343 234 491 956 536 658 108 234 405 517 578 040 576 526 128 250 88 × 2 = 0 + 0.323 080 686 468 983 913 073 316 216 468 811 035 156 081 153 052 256 501 76;
  • 50) 0.323 080 686 468 983 913 073 316 216 468 811 035 156 081 153 052 256 501 76 × 2 = 0 + 0.646 161 372 937 967 826 146 632 432 937 622 070 312 162 306 104 513 003 52;
  • 51) 0.646 161 372 937 967 826 146 632 432 937 622 070 312 162 306 104 513 003 52 × 2 = 1 + 0.292 322 745 875 935 652 293 264 865 875 244 140 624 324 612 209 026 007 04;
  • 52) 0.292 322 745 875 935 652 293 264 865 875 244 140 624 324 612 209 026 007 04 × 2 = 0 + 0.584 645 491 751 871 304 586 529 731 750 488 281 248 649 224 418 052 014 08;
  • 53) 0.584 645 491 751 871 304 586 529 731 750 488 281 248 649 224 418 052 014 08 × 2 = 1 + 0.169 290 983 503 742 609 173 059 463 500 976 562 497 298 448 836 104 028 16;
  • 54) 0.169 290 983 503 742 609 173 059 463 500 976 562 497 298 448 836 104 028 16 × 2 = 0 + 0.338 581 967 007 485 218 346 118 927 001 953 124 994 596 897 672 208 056 32;
  • 55) 0.338 581 967 007 485 218 346 118 927 001 953 124 994 596 897 672 208 056 32 × 2 = 0 + 0.677 163 934 014 970 436 692 237 854 003 906 249 989 193 795 344 416 112 64;
  • 56) 0.677 163 934 014 970 436 692 237 854 003 906 249 989 193 795 344 416 112 64 × 2 = 1 + 0.354 327 868 029 940 873 384 475 708 007 812 499 978 387 590 688 832 225 28;
  • 57) 0.354 327 868 029 940 873 384 475 708 007 812 499 978 387 590 688 832 225 28 × 2 = 0 + 0.708 655 736 059 881 746 768 951 416 015 624 999 956 775 181 377 664 450 56;
  • 58) 0.708 655 736 059 881 746 768 951 416 015 624 999 956 775 181 377 664 450 56 × 2 = 1 + 0.417 311 472 119 763 493 537 902 832 031 249 999 913 550 362 755 328 901 12;
  • 59) 0.417 311 472 119 763 493 537 902 832 031 249 999 913 550 362 755 328 901 12 × 2 = 0 + 0.834 622 944 239 526 987 075 805 664 062 499 999 827 100 725 510 657 802 24;
  • 60) 0.834 622 944 239 526 987 075 805 664 062 499 999 827 100 725 510 657 802 24 × 2 = 1 + 0.669 245 888 479 053 974 151 611 328 124 999 999 654 201 451 021 315 604 48;
  • 61) 0.669 245 888 479 053 974 151 611 328 124 999 999 654 201 451 021 315 604 48 × 2 = 1 + 0.338 491 776 958 107 948 303 222 656 249 999 999 308 402 902 042 631 208 96;
  • 62) 0.338 491 776 958 107 948 303 222 656 249 999 999 308 402 902 042 631 208 96 × 2 = 0 + 0.676 983 553 916 215 896 606 445 312 499 999 998 616 805 804 085 262 417 92;
  • 63) 0.676 983 553 916 215 896 606 445 312 499 999 998 616 805 804 085 262 417 92 × 2 = 1 + 0.353 967 107 832 431 793 212 890 624 999 999 997 233 611 608 170 524 835 84;
  • 64) 0.353 967 107 832 431 793 212 890 624 999 999 997 233 611 608 170 524 835 84 × 2 = 0 + 0.707 934 215 664 863 586 425 781 249 999 999 994 467 223 216 341 049 671 68;
  • 65) 0.707 934 215 664 863 586 425 781 249 999 999 994 467 223 216 341 049 671 68 × 2 = 1 + 0.415 868 431 329 727 172 851 562 499 999 999 988 934 446 432 682 099 343 36;
  • 66) 0.415 868 431 329 727 172 851 562 499 999 999 988 934 446 432 682 099 343 36 × 2 = 0 + 0.831 736 862 659 454 345 703 124 999 999 999 977 868 892 865 364 198 686 72;
  • 67) 0.831 736 862 659 454 345 703 124 999 999 999 977 868 892 865 364 198 686 72 × 2 = 1 + 0.663 473 725 318 908 691 406 249 999 999 999 955 737 785 730 728 397 373 44;
  • 68) 0.663 473 725 318 908 691 406 249 999 999 999 955 737 785 730 728 397 373 44 × 2 = 1 + 0.326 947 450 637 817 382 812 499 999 999 999 911 475 571 461 456 794 746 88;
  • 69) 0.326 947 450 637 817 382 812 499 999 999 999 911 475 571 461 456 794 746 88 × 2 = 0 + 0.653 894 901 275 634 765 624 999 999 999 999 822 951 142 922 913 589 493 76;
  • 70) 0.653 894 901 275 634 765 624 999 999 999 999 822 951 142 922 913 589 493 76 × 2 = 1 + 0.307 789 802 551 269 531 249 999 999 999 999 645 902 285 845 827 178 987 52;
  • 71) 0.307 789 802 551 269 531 249 999 999 999 999 645 902 285 845 827 178 987 52 × 2 = 0 + 0.615 579 605 102 539 062 499 999 999 999 999 291 804 571 691 654 357 975 04;
  • 72) 0.615 579 605 102 539 062 499 999 999 999 999 291 804 571 691 654 357 975 04 × 2 = 1 + 0.231 159 210 205 078 124 999 999 999 999 998 583 609 143 383 308 715 950 08;
  • 73) 0.231 159 210 205 078 124 999 999 999 999 998 583 609 143 383 308 715 950 08 × 2 = 0 + 0.462 318 420 410 156 249 999 999 999 999 997 167 218 286 766 617 431 900 16;
  • 74) 0.462 318 420 410 156 249 999 999 999 999 997 167 218 286 766 617 431 900 16 × 2 = 0 + 0.924 636 840 820 312 499 999 999 999 999 994 334 436 573 533 234 863 800 32;
  • 75) 0.924 636 840 820 312 499 999 999 999 999 994 334 436 573 533 234 863 800 32 × 2 = 1 + 0.849 273 681 640 624 999 999 999 999 999 988 668 873 147 066 469 727 600 64;
  • 76) 0.849 273 681 640 624 999 999 999 999 999 988 668 873 147 066 469 727 600 64 × 2 = 1 + 0.698 547 363 281 249 999 999 999 999 999 977 337 746 294 132 939 455 201 28;
  • 77) 0.698 547 363 281 249 999 999 999 999 999 977 337 746 294 132 939 455 201 28 × 2 = 1 + 0.397 094 726 562 499 999 999 999 999 999 954 675 492 588 265 878 910 402 56;
  • 78) 0.397 094 726 562 499 999 999 999 999 999 954 675 492 588 265 878 910 402 56 × 2 = 0 + 0.794 189 453 124 999 999 999 999 999 999 909 350 985 176 531 757 820 805 12;
  • 79) 0.794 189 453 124 999 999 999 999 999 999 909 350 985 176 531 757 820 805 12 × 2 = 1 + 0.588 378 906 249 999 999 999 999 999 999 818 701 970 353 063 515 641 610 24;
  • 80) 0.588 378 906 249 999 999 999 999 999 999 818 701 970 353 063 515 641 610 24 × 2 = 1 + 0.176 757 812 499 999 999 999 999 999 999 637 403 940 706 127 031 283 220 48;
  • 81) 0.176 757 812 499 999 999 999 999 999 999 637 403 940 706 127 031 283 220 48 × 2 = 0 + 0.353 515 624 999 999 999 999 999 999 999 274 807 881 412 254 062 566 440 96;
  • 82) 0.353 515 624 999 999 999 999 999 999 999 274 807 881 412 254 062 566 440 96 × 2 = 0 + 0.707 031 249 999 999 999 999 999 999 998 549 615 762 824 508 125 132 881 92;
  • 83) 0.707 031 249 999 999 999 999 999 999 998 549 615 762 824 508 125 132 881 92 × 2 = 1 + 0.414 062 499 999 999 999 999 999 999 997 099 231 525 649 016 250 265 763 84;
  • 84) 0.414 062 499 999 999 999 999 999 999 997 099 231 525 649 016 250 265 763 84 × 2 = 0 + 0.828 124 999 999 999 999 999 999 999 994 198 463 051 298 032 500 531 527 68;
  • 85) 0.828 124 999 999 999 999 999 999 999 994 198 463 051 298 032 500 531 527 68 × 2 = 1 + 0.656 249 999 999 999 999 999 999 999 988 396 926 102 596 065 001 063 055 36;
  • 86) 0.656 249 999 999 999 999 999 999 999 988 396 926 102 596 065 001 063 055 36 × 2 = 1 + 0.312 499 999 999 999 999 999 999 999 976 793 852 205 192 130 002 126 110 72;
  • 87) 0.312 499 999 999 999 999 999 999 999 976 793 852 205 192 130 002 126 110 72 × 2 = 0 + 0.624 999 999 999 999 999 999 999 999 953 587 704 410 384 260 004 252 221 44;
  • 88) 0.624 999 999 999 999 999 999 999 999 953 587 704 410 384 260 004 252 221 44 × 2 = 1 + 0.249 999 999 999 999 999 999 999 999 907 175 408 820 768 520 008 504 442 88;
  • 89) 0.249 999 999 999 999 999 999 999 999 907 175 408 820 768 520 008 504 442 88 × 2 = 0 + 0.499 999 999 999 999 999 999 999 999 814 350 817 641 537 040 017 008 885 76;
  • 90) 0.499 999 999 999 999 999 999 999 999 814 350 817 641 537 040 017 008 885 76 × 2 = 0 + 0.999 999 999 999 999 999 999 999 999 628 701 635 283 074 080 034 017 771 52;
  • 91) 0.999 999 999 999 999 999 999 999 999 628 701 635 283 074 080 034 017 771 52 × 2 = 1 + 0.999 999 999 999 999 999 999 999 999 257 403 270 566 148 160 068 035 543 04;

We didn't get any fractional part that was equal to zero. But we had enough iterations (over Mantissa limit) and at least one integer that was different from zero => FULL STOP (Losing precision - the converted number we get in the end will be just a very good approximation of the initial one).


4. Construct the base 2 representation of the fractional part of the number.

Take all the integer parts of the multiplying operations, starting from the top of the constructed list above:


0.000 000 000 003 634 999 999 999 999 758 261 057 032 300 678 335 152 987 73(10) =

0.0000 0000 0000 0000 0000 0000 0000 0000 0000 0011 1111 1111 0010 1001 0101 1010 1011 0101 0011 1011 0010 1101 001(2)

5. Positive number before normalization:

0.000 000 000 003 634 999 999 999 999 758 261 057 032 300 678 335 152 987 73(10) =

0.0000 0000 0000 0000 0000 0000 0000 0000 0000 0011 1111 1111 0010 1001 0101 1010 1011 0101 0011 1011 0010 1101 001(2)

6. Normalize the binary representation of the number.

Shift the decimal mark 39 positions to the right, so that only one non zero digit remains to the left of it:


0.000 000 000 003 634 999 999 999 999 758 261 057 032 300 678 335 152 987 73(10) =

0.0000 0000 0000 0000 0000 0000 0000 0000 0000 0011 1111 1111 0010 1001 0101 1010 1011 0101 0011 1011 0010 1101 001(2) =

0.0000 0000 0000 0000 0000 0000 0000 0000 0000 0011 1111 1111 0010 1001 0101 1010 1011 0101 0011 1011 0010 1101 001(2) × 20 =

1.1111 1111 1001 0100 1010 1101 0101 1010 1001 1101 1001 0110 1001(2) × 2-39


7. Up to this moment, there are the following elements that would feed into the 64 bit double precision IEEE 754 binary floating point representation:

Sign 0 (a positive number)

Exponent (unadjusted): -39

Mantissa (not normalized):
1.1111 1111 1001 0100 1010 1101 0101 1010 1001 1101 1001 0110 1001


8. Adjust the exponent.

Use the 11 bit excess/bias notation:


Exponent (adjusted) =

Exponent (unadjusted) + 2(11-1) - 1 =

-39 + 2(11-1) - 1 =

(-39 + 1 023)(10) =

984(10)


9. Convert the adjusted exponent from the decimal (base 10) to 11 bit binary.

Use the same technique of repeatedly dividing by 2:


  • division = quotient + remainder;
  • 984 ÷ 2 = 492 + 0;
  • 492 ÷ 2 = 246 + 0;
  • 246 ÷ 2 = 123 + 0;
  • 123 ÷ 2 = 61 + 1;
  • 61 ÷ 2 = 30 + 1;
  • 30 ÷ 2 = 15 + 0;
  • 15 ÷ 2 = 7 + 1;
  • 7 ÷ 2 = 3 + 1;
  • 3 ÷ 2 = 1 + 1;
  • 1 ÷ 2 = 0 + 1;

10. Construct the base 2 representation of the adjusted exponent.

Take all the remainders starting from the bottom of the list constructed above.


Exponent (adjusted) =

984(10) =

011 1101 1000(2)


11. Normalize the mantissa.

a) Remove the leading (the leftmost) bit, since it's allways 1, and the decimal point, if the case.

b) Adjust its length to 52 bits, only if necessary (not the case here).


Mantissa (normalized) =

1. 1111 1111 1001 0100 1010 1101 0101 1010 1001 1101 1001 0110 1001 =

1111 1111 1001 0100 1010 1101 0101 1010 1001 1101 1001 0110 1001


12. The three elements that make up the number's 64 bit double precision IEEE 754 binary floating point representation:

Sign (1 bit) =
0 (a positive number)

Exponent (11 bits) =
011 1101 1000

Mantissa (52 bits) =
1111 1111 1001 0100 1010 1101 0101 1010 1001 1101 1001 0110 1001


Decimal number 0.000 000 000 003 634 999 999 999 999 758 261 057 032 300 678 335 152 987 73 converted to 64 bit double precision IEEE 754 binary floating point representation:

0 - 011 1101 1000 - 1111 1111 1001 0100 1010 1101 0101 1010 1001 1101 1001 0110 1001

Share

» Convert decimal 0.000 000 000 003 634 999 999 999 999 758 261 057 032 300 678 335 152 987 22 to 64 bit double precision IEEE 754 binary floating point representation standard

» Calculations Performed by Our Visitors: Decimal Numbers Converted to 64 Bit Double Precision IEEE 754 Binary Floating Point Representation Standard. Data organized on a Monthly Basis

» Month 07, 2026 [July]: Decimal Numbers Converted to 64 Bit Double Precision IEEE 754 Binary Floating Point Representation Standard. Calculations performed during the month of: July - by our visitors

» Improve your social skills: The Attention Economy - The Battlefield For Your Focus. NotebookLM YouTube Video of 7.50 minutes

How to convert numbers from the decimal system (base ten) to 64 bit double precision IEEE 754 binary floating point standard

Follow the steps below to convert a base 10 decimal number to 64 bit double precision IEEE 754 binary floating point:

  • 1. If the number to be converted is negative, start with its the positive version.
  • 2. First convert the integer part. Divide repeatedly by 2 the positive representation of the integer number that is to be converted to binary, until we get a quotient that is equal to zero, keeping track of each remainder.
  • 3. Construct the base 2 representation of the positive integer part of the number, by taking all the remainders from the previous operations, starting from the bottom of the list constructed above. Thus, the last remainder of the divisions becomes the first symbol (the leftmost) of the base two number, while the first remainder becomes the last symbol (the rightmost).
  • 4. Then convert the fractional part. Multiply the number repeatedly by 2, until we get a fractional part that is equal to zero, keeping track of each integer part of the results.
  • 5. Construct the base 2 representation of the fractional part of the number, by taking all the integer parts of the multiplying operations, starting from the top of the list constructed above (they should appear in the binary representation, from left to right, in the order they have been calculated).
  • 6. Normalize the binary representation of the number, shifting the decimal mark (the decimal point) "n" positions either to the left, or to the right, so that only one non zero digit remains to the left of the decimal mark.
  • 7. Adjust the exponent in 11 bit excess/bias notation and then convert it from decimal (base 10) to 11 bit binary, by using the same technique of repeatedly dividing by 2, as shown above:
    Exponent (adjusted) = Exponent (unadjusted) + 2(11-1) - 1
  • 8. Normalize mantissa, remove the leading (leftmost) bit, since it's allways '1' (and the decimal mark, if the case) and adjust its length to 52 bits, either by removing the excess bits from the right (losing precision...) or by adding extra bits set on '0' to the right.
  • 9. Sign (it takes 1 bit) is either 1 for a negative or 0 for a positive number.

Example: convert the negative number -31.640 215 from the decimal system (base ten) to 64 bit double precision IEEE 754 binary floating point:

  • 1. Start with the positive version of the number:

    |-31.640 215| = 31.640 215

  • 2. First convert the integer part, 31. Divide it repeatedly by 2, keeping track of each remainder, until we get a quotient that is equal to zero:
    • division = quotient + remainder;
    • 31 ÷ 2 = 15 + 1;
    • 15 ÷ 2 = 7 + 1;
    • 7 ÷ 2 = 3 + 1;
    • 3 ÷ 2 = 1 + 1;
    • 1 ÷ 2 = 0 + 1;
    • We have encountered a quotient that is ZERO => FULL STOP
  • 3. Construct the base 2 representation of the integer part of the number by taking all the remainders of the previous dividing operations, starting from the bottom of the list constructed above:

    31(10) = 1 1111(2)

  • 4. Then, convert the fractional part, 0.640 215. Multiply repeatedly by 2, keeping track of each integer part of the results, until we get a fractional part that is equal to zero:
    • #) multiplying = integer + fractional part;
    • 1) 0.640 215 × 2 = 1 + 0.280 43;
    • 2) 0.280 43 × 2 = 0 + 0.560 86;
    • 3) 0.560 86 × 2 = 1 + 0.121 72;
    • 4) 0.121 72 × 2 = 0 + 0.243 44;
    • 5) 0.243 44 × 2 = 0 + 0.486 88;
    • 6) 0.486 88 × 2 = 0 + 0.973 76;
    • 7) 0.973 76 × 2 = 1 + 0.947 52;
    • 8) 0.947 52 × 2 = 1 + 0.895 04;
    • 9) 0.895 04 × 2 = 1 + 0.790 08;
    • 10) 0.790 08 × 2 = 1 + 0.580 16;
    • 11) 0.580 16 × 2 = 1 + 0.160 32;
    • 12) 0.160 32 × 2 = 0 + 0.320 64;
    • 13) 0.320 64 × 2 = 0 + 0.641 28;
    • 14) 0.641 28 × 2 = 1 + 0.282 56;
    • 15) 0.282 56 × 2 = 0 + 0.565 12;
    • 16) 0.565 12 × 2 = 1 + 0.130 24;
    • 17) 0.130 24 × 2 = 0 + 0.260 48;
    • 18) 0.260 48 × 2 = 0 + 0.520 96;
    • 19) 0.520 96 × 2 = 1 + 0.041 92;
    • 20) 0.041 92 × 2 = 0 + 0.083 84;
    • 21) 0.083 84 × 2 = 0 + 0.167 68;
    • 22) 0.167 68 × 2 = 0 + 0.335 36;
    • 23) 0.335 36 × 2 = 0 + 0.670 72;
    • 24) 0.670 72 × 2 = 1 + 0.341 44;
    • 25) 0.341 44 × 2 = 0 + 0.682 88;
    • 26) 0.682 88 × 2 = 1 + 0.365 76;
    • 27) 0.365 76 × 2 = 0 + 0.731 52;
    • 28) 0.731 52 × 2 = 1 + 0.463 04;
    • 29) 0.463 04 × 2 = 0 + 0.926 08;
    • 30) 0.926 08 × 2 = 1 + 0.852 16;
    • 31) 0.852 16 × 2 = 1 + 0.704 32;
    • 32) 0.704 32 × 2 = 1 + 0.408 64;
    • 33) 0.408 64 × 2 = 0 + 0.817 28;
    • 34) 0.817 28 × 2 = 1 + 0.634 56;
    • 35) 0.634 56 × 2 = 1 + 0.269 12;
    • 36) 0.269 12 × 2 = 0 + 0.538 24;
    • 37) 0.538 24 × 2 = 1 + 0.076 48;
    • 38) 0.076 48 × 2 = 0 + 0.152 96;
    • 39) 0.152 96 × 2 = 0 + 0.305 92;
    • 40) 0.305 92 × 2 = 0 + 0.611 84;
    • 41) 0.611 84 × 2 = 1 + 0.223 68;
    • 42) 0.223 68 × 2 = 0 + 0.447 36;
    • 43) 0.447 36 × 2 = 0 + 0.894 72;
    • 44) 0.894 72 × 2 = 1 + 0.789 44;
    • 45) 0.789 44 × 2 = 1 + 0.578 88;
    • 46) 0.578 88 × 2 = 1 + 0.157 76;
    • 47) 0.157 76 × 2 = 0 + 0.315 52;
    • 48) 0.315 52 × 2 = 0 + 0.631 04;
    • 49) 0.631 04 × 2 = 1 + 0.262 08;
    • 50) 0.262 08 × 2 = 0 + 0.524 16;
    • 51) 0.524 16 × 2 = 1 + 0.048 32;
    • 52) 0.048 32 × 2 = 0 + 0.096 64;
    • 53) 0.096 64 × 2 = 0 + 0.193 28;
    • We didn't get any fractional part that was equal to zero. But we had enough iterations (over Mantissa limit = 52) and at least one integer part that was different from zero => FULL STOP (losing precision...).
  • 5. Construct the base 2 representation of the fractional part of the number, by taking all the integer parts of the previous multiplying operations, starting from the top of the constructed list above:

    0.640 215(10) = 0.1010 0011 1110 0101 0010 0001 0101 0111 0110 1000 1001 1100 1010 0(2)

  • 6. Summarizing - the positive number before normalization:

    31.640 215(10) = 1 1111.1010 0011 1110 0101 0010 0001 0101 0111 0110 1000 1001 1100 1010 0(2)

  • 7. Normalize the binary representation of the number, shifting the decimal mark 4 positions to the left so that only one non-zero digit stays to the left of the decimal mark:

    31.640 215(10) =
    1 1111.1010 0011 1110 0101 0010 0001 0101 0111 0110 1000 1001 1100 1010 0(2) =
    1 1111.1010 0011 1110 0101 0010 0001 0101 0111 0110 1000 1001 1100 1010 0(2) × 20 =
    1.1111 1010 0011 1110 0101 0010 0001 0101 0111 0110 1000 1001 1100 1010 0(2) × 24

  • 8. Up to this moment, there are the following elements that would feed into the 64 bit double precision IEEE 754 binary floating point representation:

    Sign: 1 (a negative number)

    Exponent (unadjusted): 4

    Mantissa (not-normalized): 1.1111 1010 0011 1110 0101 0010 0001 0101 0111 0110 1000 1001 1100 1010 0

  • 9. Adjust the exponent in 11 bit excess/bias notation and then convert it from decimal (base 10) to 11 bit binary (base 2), by using the same technique of repeatedly dividing it by 2, as shown above:

    Exponent (adjusted) = Exponent (unadjusted) + 2(11-1) - 1 = (4 + 1023)(10) = 1027(10) =
    100 0000 0011(2)

  • 10. Normalize mantissa, remove the leading (leftmost) bit, since it's allways '1' (and the decimal sign) and adjust its length to 52 bits, by removing the excess bits, from the right (losing precision...):

    Mantissa (not-normalized): 1.1111 1010 0011 1110 0101 0010 0001 0101 0111 0110 1000 1001 1100 1010 0

    Mantissa (normalized): 1111 1010 0011 1110 0101 0010 0001 0101 0111 0110 1000 1001 1100

  • Conclusion:

    Sign (1 bit) = 1 (a negative number)

    Exponent (8 bits) = 100 0000 0011

    Mantissa (52 bits) = 1111 1010 0011 1110 0101 0010 0001 0101 0111 0110 1000 1001 1100

  • Number -31.640 215, converted from decimal system (base 10) to 64 bit double precision IEEE 754 binary floating point =
    1 - 100 0000 0011 - 1111 1010 0011 1110 0101 0010 0001 0101 0111 0110 1000 1001 1100