0.000 000 000 003 634 999 999 999 999 758 261 057 032 300 678 335 152 988 029 931 33 Converted to 64 Bit Double Precision IEEE 754 Binary Floating Point Representation Standard

Convert decimal 0.000 000 000 003 634 999 999 999 999 758 261 057 032 300 678 335 152 988 029 931 33(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
0.000 000 000 003 634 999 999 999 999 758 261 057 032 300 678 335 152 988 029 931 33(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: 0.000 000 000 003 634 999 999 999 999 758 261 057 032 300 678 335 152 988 029 931 33.

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) 0.000 000 000 003 634 999 999 999 999 758 261 057 032 300 678 335 152 988 029 931 33 × 2 = 0 + 0.000 000 000 007 269 999 999 999 999 516 522 114 064 601 356 670 305 976 059 862 66;
  • 2) 0.000 000 000 007 269 999 999 999 999 516 522 114 064 601 356 670 305 976 059 862 66 × 2 = 0 + 0.000 000 000 014 539 999 999 999 999 033 044 228 129 202 713 340 611 952 119 725 32;
  • 3) 0.000 000 000 014 539 999 999 999 999 033 044 228 129 202 713 340 611 952 119 725 32 × 2 = 0 + 0.000 000 000 029 079 999 999 999 998 066 088 456 258 405 426 681 223 904 239 450 64;
  • 4) 0.000 000 000 029 079 999 999 999 998 066 088 456 258 405 426 681 223 904 239 450 64 × 2 = 0 + 0.000 000 000 058 159 999 999 999 996 132 176 912 516 810 853 362 447 808 478 901 28;
  • 5) 0.000 000 000 058 159 999 999 999 996 132 176 912 516 810 853 362 447 808 478 901 28 × 2 = 0 + 0.000 000 000 116 319 999 999 999 992 264 353 825 033 621 706 724 895 616 957 802 56;
  • 6) 0.000 000 000 116 319 999 999 999 992 264 353 825 033 621 706 724 895 616 957 802 56 × 2 = 0 + 0.000 000 000 232 639 999 999 999 984 528 707 650 067 243 413 449 791 233 915 605 12;
  • 7) 0.000 000 000 232 639 999 999 999 984 528 707 650 067 243 413 449 791 233 915 605 12 × 2 = 0 + 0.000 000 000 465 279 999 999 999 969 057 415 300 134 486 826 899 582 467 831 210 24;
  • 8) 0.000 000 000 465 279 999 999 999 969 057 415 300 134 486 826 899 582 467 831 210 24 × 2 = 0 + 0.000 000 000 930 559 999 999 999 938 114 830 600 268 973 653 799 164 935 662 420 48;
  • 9) 0.000 000 000 930 559 999 999 999 938 114 830 600 268 973 653 799 164 935 662 420 48 × 2 = 0 + 0.000 000 001 861 119 999 999 999 876 229 661 200 537 947 307 598 329 871 324 840 96;
  • 10) 0.000 000 001 861 119 999 999 999 876 229 661 200 537 947 307 598 329 871 324 840 96 × 2 = 0 + 0.000 000 003 722 239 999 999 999 752 459 322 401 075 894 615 196 659 742 649 681 92;
  • 11) 0.000 000 003 722 239 999 999 999 752 459 322 401 075 894 615 196 659 742 649 681 92 × 2 = 0 + 0.000 000 007 444 479 999 999 999 504 918 644 802 151 789 230 393 319 485 299 363 84;
  • 12) 0.000 000 007 444 479 999 999 999 504 918 644 802 151 789 230 393 319 485 299 363 84 × 2 = 0 + 0.000 000 014 888 959 999 999 999 009 837 289 604 303 578 460 786 638 970 598 727 68;
  • 13) 0.000 000 014 888 959 999 999 999 009 837 289 604 303 578 460 786 638 970 598 727 68 × 2 = 0 + 0.000 000 029 777 919 999 999 998 019 674 579 208 607 156 921 573 277 941 197 455 36;
  • 14) 0.000 000 029 777 919 999 999 998 019 674 579 208 607 156 921 573 277 941 197 455 36 × 2 = 0 + 0.000 000 059 555 839 999 999 996 039 349 158 417 214 313 843 146 555 882 394 910 72;
  • 15) 0.000 000 059 555 839 999 999 996 039 349 158 417 214 313 843 146 555 882 394 910 72 × 2 = 0 + 0.000 000 119 111 679 999 999 992 078 698 316 834 428 627 686 293 111 764 789 821 44;
  • 16) 0.000 000 119 111 679 999 999 992 078 698 316 834 428 627 686 293 111 764 789 821 44 × 2 = 0 + 0.000 000 238 223 359 999 999 984 157 396 633 668 857 255 372 586 223 529 579 642 88;
  • 17) 0.000 000 238 223 359 999 999 984 157 396 633 668 857 255 372 586 223 529 579 642 88 × 2 = 0 + 0.000 000 476 446 719 999 999 968 314 793 267 337 714 510 745 172 447 059 159 285 76;
  • 18) 0.000 000 476 446 719 999 999 968 314 793 267 337 714 510 745 172 447 059 159 285 76 × 2 = 0 + 0.000 000 952 893 439 999 999 936 629 586 534 675 429 021 490 344 894 118 318 571 52;
  • 19) 0.000 000 952 893 439 999 999 936 629 586 534 675 429 021 490 344 894 118 318 571 52 × 2 = 0 + 0.000 001 905 786 879 999 999 873 259 173 069 350 858 042 980 689 788 236 637 143 04;
  • 20) 0.000 001 905 786 879 999 999 873 259 173 069 350 858 042 980 689 788 236 637 143 04 × 2 = 0 + 0.000 003 811 573 759 999 999 746 518 346 138 701 716 085 961 379 576 473 274 286 08;
  • 21) 0.000 003 811 573 759 999 999 746 518 346 138 701 716 085 961 379 576 473 274 286 08 × 2 = 0 + 0.000 007 623 147 519 999 999 493 036 692 277 403 432 171 922 759 152 946 548 572 16;
  • 22) 0.000 007 623 147 519 999 999 493 036 692 277 403 432 171 922 759 152 946 548 572 16 × 2 = 0 + 0.000 015 246 295 039 999 998 986 073 384 554 806 864 343 845 518 305 893 097 144 32;
  • 23) 0.000 015 246 295 039 999 998 986 073 384 554 806 864 343 845 518 305 893 097 144 32 × 2 = 0 + 0.000 030 492 590 079 999 997 972 146 769 109 613 728 687 691 036 611 786 194 288 64;
  • 24) 0.000 030 492 590 079 999 997 972 146 769 109 613 728 687 691 036 611 786 194 288 64 × 2 = 0 + 0.000 060 985 180 159 999 995 944 293 538 219 227 457 375 382 073 223 572 388 577 28;
  • 25) 0.000 060 985 180 159 999 995 944 293 538 219 227 457 375 382 073 223 572 388 577 28 × 2 = 0 + 0.000 121 970 360 319 999 991 888 587 076 438 454 914 750 764 146 447 144 777 154 56;
  • 26) 0.000 121 970 360 319 999 991 888 587 076 438 454 914 750 764 146 447 144 777 154 56 × 2 = 0 + 0.000 243 940 720 639 999 983 777 174 152 876 909 829 501 528 292 894 289 554 309 12;
  • 27) 0.000 243 940 720 639 999 983 777 174 152 876 909 829 501 528 292 894 289 554 309 12 × 2 = 0 + 0.000 487 881 441 279 999 967 554 348 305 753 819 659 003 056 585 788 579 108 618 24;
  • 28) 0.000 487 881 441 279 999 967 554 348 305 753 819 659 003 056 585 788 579 108 618 24 × 2 = 0 + 0.000 975 762 882 559 999 935 108 696 611 507 639 318 006 113 171 577 158 217 236 48;
  • 29) 0.000 975 762 882 559 999 935 108 696 611 507 639 318 006 113 171 577 158 217 236 48 × 2 = 0 + 0.001 951 525 765 119 999 870 217 393 223 015 278 636 012 226 343 154 316 434 472 96;
  • 30) 0.001 951 525 765 119 999 870 217 393 223 015 278 636 012 226 343 154 316 434 472 96 × 2 = 0 + 0.003 903 051 530 239 999 740 434 786 446 030 557 272 024 452 686 308 632 868 945 92;
  • 31) 0.003 903 051 530 239 999 740 434 786 446 030 557 272 024 452 686 308 632 868 945 92 × 2 = 0 + 0.007 806 103 060 479 999 480 869 572 892 061 114 544 048 905 372 617 265 737 891 84;
  • 32) 0.007 806 103 060 479 999 480 869 572 892 061 114 544 048 905 372 617 265 737 891 84 × 2 = 0 + 0.015 612 206 120 959 998 961 739 145 784 122 229 088 097 810 745 234 531 475 783 68;
  • 33) 0.015 612 206 120 959 998 961 739 145 784 122 229 088 097 810 745 234 531 475 783 68 × 2 = 0 + 0.031 224 412 241 919 997 923 478 291 568 244 458 176 195 621 490 469 062 951 567 36;
  • 34) 0.031 224 412 241 919 997 923 478 291 568 244 458 176 195 621 490 469 062 951 567 36 × 2 = 0 + 0.062 448 824 483 839 995 846 956 583 136 488 916 352 391 242 980 938 125 903 134 72;
  • 35) 0.062 448 824 483 839 995 846 956 583 136 488 916 352 391 242 980 938 125 903 134 72 × 2 = 0 + 0.124 897 648 967 679 991 693 913 166 272 977 832 704 782 485 961 876 251 806 269 44;
  • 36) 0.124 897 648 967 679 991 693 913 166 272 977 832 704 782 485 961 876 251 806 269 44 × 2 = 0 + 0.249 795 297 935 359 983 387 826 332 545 955 665 409 564 971 923 752 503 612 538 88;
  • 37) 0.249 795 297 935 359 983 387 826 332 545 955 665 409 564 971 923 752 503 612 538 88 × 2 = 0 + 0.499 590 595 870 719 966 775 652 665 091 911 330 819 129 943 847 505 007 225 077 76;
  • 38) 0.499 590 595 870 719 966 775 652 665 091 911 330 819 129 943 847 505 007 225 077 76 × 2 = 0 + 0.999 181 191 741 439 933 551 305 330 183 822 661 638 259 887 695 010 014 450 155 52;
  • 39) 0.999 181 191 741 439 933 551 305 330 183 822 661 638 259 887 695 010 014 450 155 52 × 2 = 1 + 0.998 362 383 482 879 867 102 610 660 367 645 323 276 519 775 390 020 028 900 311 04;
  • 40) 0.998 362 383 482 879 867 102 610 660 367 645 323 276 519 775 390 020 028 900 311 04 × 2 = 1 + 0.996 724 766 965 759 734 205 221 320 735 290 646 553 039 550 780 040 057 800 622 08;
  • 41) 0.996 724 766 965 759 734 205 221 320 735 290 646 553 039 550 780 040 057 800 622 08 × 2 = 1 + 0.993 449 533 931 519 468 410 442 641 470 581 293 106 079 101 560 080 115 601 244 16;
  • 42) 0.993 449 533 931 519 468 410 442 641 470 581 293 106 079 101 560 080 115 601 244 16 × 2 = 1 + 0.986 899 067 863 038 936 820 885 282 941 162 586 212 158 203 120 160 231 202 488 32;
  • 43) 0.986 899 067 863 038 936 820 885 282 941 162 586 212 158 203 120 160 231 202 488 32 × 2 = 1 + 0.973 798 135 726 077 873 641 770 565 882 325 172 424 316 406 240 320 462 404 976 64;
  • 44) 0.973 798 135 726 077 873 641 770 565 882 325 172 424 316 406 240 320 462 404 976 64 × 2 = 1 + 0.947 596 271 452 155 747 283 541 131 764 650 344 848 632 812 480 640 924 809 953 28;
  • 45) 0.947 596 271 452 155 747 283 541 131 764 650 344 848 632 812 480 640 924 809 953 28 × 2 = 1 + 0.895 192 542 904 311 494 567 082 263 529 300 689 697 265 624 961 281 849 619 906 56;
  • 46) 0.895 192 542 904 311 494 567 082 263 529 300 689 697 265 624 961 281 849 619 906 56 × 2 = 1 + 0.790 385 085 808 622 989 134 164 527 058 601 379 394 531 249 922 563 699 239 813 12;
  • 47) 0.790 385 085 808 622 989 134 164 527 058 601 379 394 531 249 922 563 699 239 813 12 × 2 = 1 + 0.580 770 171 617 245 978 268 329 054 117 202 758 789 062 499 845 127 398 479 626 24;
  • 48) 0.580 770 171 617 245 978 268 329 054 117 202 758 789 062 499 845 127 398 479 626 24 × 2 = 1 + 0.161 540 343 234 491 956 536 658 108 234 405 517 578 124 999 690 254 796 959 252 48;
  • 49) 0.161 540 343 234 491 956 536 658 108 234 405 517 578 124 999 690 254 796 959 252 48 × 2 = 0 + 0.323 080 686 468 983 913 073 316 216 468 811 035 156 249 999 380 509 593 918 504 96;
  • 50) 0.323 080 686 468 983 913 073 316 216 468 811 035 156 249 999 380 509 593 918 504 96 × 2 = 0 + 0.646 161 372 937 967 826 146 632 432 937 622 070 312 499 998 761 019 187 837 009 92;
  • 51) 0.646 161 372 937 967 826 146 632 432 937 622 070 312 499 998 761 019 187 837 009 92 × 2 = 1 + 0.292 322 745 875 935 652 293 264 865 875 244 140 624 999 997 522 038 375 674 019 84;
  • 52) 0.292 322 745 875 935 652 293 264 865 875 244 140 624 999 997 522 038 375 674 019 84 × 2 = 0 + 0.584 645 491 751 871 304 586 529 731 750 488 281 249 999 995 044 076 751 348 039 68;
  • 53) 0.584 645 491 751 871 304 586 529 731 750 488 281 249 999 995 044 076 751 348 039 68 × 2 = 1 + 0.169 290 983 503 742 609 173 059 463 500 976 562 499 999 990 088 153 502 696 079 36;
  • 54) 0.169 290 983 503 742 609 173 059 463 500 976 562 499 999 990 088 153 502 696 079 36 × 2 = 0 + 0.338 581 967 007 485 218 346 118 927 001 953 124 999 999 980 176 307 005 392 158 72;
  • 55) 0.338 581 967 007 485 218 346 118 927 001 953 124 999 999 980 176 307 005 392 158 72 × 2 = 0 + 0.677 163 934 014 970 436 692 237 854 003 906 249 999 999 960 352 614 010 784 317 44;
  • 56) 0.677 163 934 014 970 436 692 237 854 003 906 249 999 999 960 352 614 010 784 317 44 × 2 = 1 + 0.354 327 868 029 940 873 384 475 708 007 812 499 999 999 920 705 228 021 568 634 88;
  • 57) 0.354 327 868 029 940 873 384 475 708 007 812 499 999 999 920 705 228 021 568 634 88 × 2 = 0 + 0.708 655 736 059 881 746 768 951 416 015 624 999 999 999 841 410 456 043 137 269 76;
  • 58) 0.708 655 736 059 881 746 768 951 416 015 624 999 999 999 841 410 456 043 137 269 76 × 2 = 1 + 0.417 311 472 119 763 493 537 902 832 031 249 999 999 999 682 820 912 086 274 539 52;
  • 59) 0.417 311 472 119 763 493 537 902 832 031 249 999 999 999 682 820 912 086 274 539 52 × 2 = 0 + 0.834 622 944 239 526 987 075 805 664 062 499 999 999 999 365 641 824 172 549 079 04;
  • 60) 0.834 622 944 239 526 987 075 805 664 062 499 999 999 999 365 641 824 172 549 079 04 × 2 = 1 + 0.669 245 888 479 053 974 151 611 328 124 999 999 999 998 731 283 648 345 098 158 08;
  • 61) 0.669 245 888 479 053 974 151 611 328 124 999 999 999 998 731 283 648 345 098 158 08 × 2 = 1 + 0.338 491 776 958 107 948 303 222 656 249 999 999 999 997 462 567 296 690 196 316 16;
  • 62) 0.338 491 776 958 107 948 303 222 656 249 999 999 999 997 462 567 296 690 196 316 16 × 2 = 0 + 0.676 983 553 916 215 896 606 445 312 499 999 999 999 994 925 134 593 380 392 632 32;
  • 63) 0.676 983 553 916 215 896 606 445 312 499 999 999 999 994 925 134 593 380 392 632 32 × 2 = 1 + 0.353 967 107 832 431 793 212 890 624 999 999 999 999 989 850 269 186 760 785 264 64;
  • 64) 0.353 967 107 832 431 793 212 890 624 999 999 999 999 989 850 269 186 760 785 264 64 × 2 = 0 + 0.707 934 215 664 863 586 425 781 249 999 999 999 999 979 700 538 373 521 570 529 28;
  • 65) 0.707 934 215 664 863 586 425 781 249 999 999 999 999 979 700 538 373 521 570 529 28 × 2 = 1 + 0.415 868 431 329 727 172 851 562 499 999 999 999 999 959 401 076 747 043 141 058 56;
  • 66) 0.415 868 431 329 727 172 851 562 499 999 999 999 999 959 401 076 747 043 141 058 56 × 2 = 0 + 0.831 736 862 659 454 345 703 124 999 999 999 999 999 918 802 153 494 086 282 117 12;
  • 67) 0.831 736 862 659 454 345 703 124 999 999 999 999 999 918 802 153 494 086 282 117 12 × 2 = 1 + 0.663 473 725 318 908 691 406 249 999 999 999 999 999 837 604 306 988 172 564 234 24;
  • 68) 0.663 473 725 318 908 691 406 249 999 999 999 999 999 837 604 306 988 172 564 234 24 × 2 = 1 + 0.326 947 450 637 817 382 812 499 999 999 999 999 999 675 208 613 976 345 128 468 48;
  • 69) 0.326 947 450 637 817 382 812 499 999 999 999 999 999 675 208 613 976 345 128 468 48 × 2 = 0 + 0.653 894 901 275 634 765 624 999 999 999 999 999 999 350 417 227 952 690 256 936 96;
  • 70) 0.653 894 901 275 634 765 624 999 999 999 999 999 999 350 417 227 952 690 256 936 96 × 2 = 1 + 0.307 789 802 551 269 531 249 999 999 999 999 999 998 700 834 455 905 380 513 873 92;
  • 71) 0.307 789 802 551 269 531 249 999 999 999 999 999 998 700 834 455 905 380 513 873 92 × 2 = 0 + 0.615 579 605 102 539 062 499 999 999 999 999 999 997 401 668 911 810 761 027 747 84;
  • 72) 0.615 579 605 102 539 062 499 999 999 999 999 999 997 401 668 911 810 761 027 747 84 × 2 = 1 + 0.231 159 210 205 078 124 999 999 999 999 999 999 994 803 337 823 621 522 055 495 68;
  • 73) 0.231 159 210 205 078 124 999 999 999 999 999 999 994 803 337 823 621 522 055 495 68 × 2 = 0 + 0.462 318 420 410 156 249 999 999 999 999 999 999 989 606 675 647 243 044 110 991 36;
  • 74) 0.462 318 420 410 156 249 999 999 999 999 999 999 989 606 675 647 243 044 110 991 36 × 2 = 0 + 0.924 636 840 820 312 499 999 999 999 999 999 999 979 213 351 294 486 088 221 982 72;
  • 75) 0.924 636 840 820 312 499 999 999 999 999 999 999 979 213 351 294 486 088 221 982 72 × 2 = 1 + 0.849 273 681 640 624 999 999 999 999 999 999 999 958 426 702 588 972 176 443 965 44;
  • 76) 0.849 273 681 640 624 999 999 999 999 999 999 999 958 426 702 588 972 176 443 965 44 × 2 = 1 + 0.698 547 363 281 249 999 999 999 999 999 999 999 916 853 405 177 944 352 887 930 88;
  • 77) 0.698 547 363 281 249 999 999 999 999 999 999 999 916 853 405 177 944 352 887 930 88 × 2 = 1 + 0.397 094 726 562 499 999 999 999 999 999 999 999 833 706 810 355 888 705 775 861 76;
  • 78) 0.397 094 726 562 499 999 999 999 999 999 999 999 833 706 810 355 888 705 775 861 76 × 2 = 0 + 0.794 189 453 124 999 999 999 999 999 999 999 999 667 413 620 711 777 411 551 723 52;
  • 79) 0.794 189 453 124 999 999 999 999 999 999 999 999 667 413 620 711 777 411 551 723 52 × 2 = 1 + 0.588 378 906 249 999 999 999 999 999 999 999 999 334 827 241 423 554 823 103 447 04;
  • 80) 0.588 378 906 249 999 999 999 999 999 999 999 999 334 827 241 423 554 823 103 447 04 × 2 = 1 + 0.176 757 812 499 999 999 999 999 999 999 999 998 669 654 482 847 109 646 206 894 08;
  • 81) 0.176 757 812 499 999 999 999 999 999 999 999 998 669 654 482 847 109 646 206 894 08 × 2 = 0 + 0.353 515 624 999 999 999 999 999 999 999 999 997 339 308 965 694 219 292 413 788 16;
  • 82) 0.353 515 624 999 999 999 999 999 999 999 999 997 339 308 965 694 219 292 413 788 16 × 2 = 0 + 0.707 031 249 999 999 999 999 999 999 999 999 994 678 617 931 388 438 584 827 576 32;
  • 83) 0.707 031 249 999 999 999 999 999 999 999 999 994 678 617 931 388 438 584 827 576 32 × 2 = 1 + 0.414 062 499 999 999 999 999 999 999 999 999 989 357 235 862 776 877 169 655 152 64;
  • 84) 0.414 062 499 999 999 999 999 999 999 999 999 989 357 235 862 776 877 169 655 152 64 × 2 = 0 + 0.828 124 999 999 999 999 999 999 999 999 999 978 714 471 725 553 754 339 310 305 28;
  • 85) 0.828 124 999 999 999 999 999 999 999 999 999 978 714 471 725 553 754 339 310 305 28 × 2 = 1 + 0.656 249 999 999 999 999 999 999 999 999 999 957 428 943 451 107 508 678 620 610 56;
  • 86) 0.656 249 999 999 999 999 999 999 999 999 999 957 428 943 451 107 508 678 620 610 56 × 2 = 1 + 0.312 499 999 999 999 999 999 999 999 999 999 914 857 886 902 215 017 357 241 221 12;
  • 87) 0.312 499 999 999 999 999 999 999 999 999 999 914 857 886 902 215 017 357 241 221 12 × 2 = 0 + 0.624 999 999 999 999 999 999 999 999 999 999 829 715 773 804 430 034 714 482 442 24;
  • 88) 0.624 999 999 999 999 999 999 999 999 999 999 829 715 773 804 430 034 714 482 442 24 × 2 = 1 + 0.249 999 999 999 999 999 999 999 999 999 999 659 431 547 608 860 069 428 964 884 48;
  • 89) 0.249 999 999 999 999 999 999 999 999 999 999 659 431 547 608 860 069 428 964 884 48 × 2 = 0 + 0.499 999 999 999 999 999 999 999 999 999 999 318 863 095 217 720 138 857 929 768 96;
  • 90) 0.499 999 999 999 999 999 999 999 999 999 999 318 863 095 217 720 138 857 929 768 96 × 2 = 0 + 0.999 999 999 999 999 999 999 999 999 999 998 637 726 190 435 440 277 715 859 537 92;
  • 91) 0.999 999 999 999 999 999 999 999 999 999 998 637 726 190 435 440 277 715 859 537 92 × 2 = 1 + 0.999 999 999 999 999 999 999 999 999 999 997 275 452 380 870 880 555 431 719 075 84;

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:


0.000 000 000 003 634 999 999 999 999 758 261 057 032 300 678 335 152 988 029 931 33(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:

0.000 000 000 003 634 999 999 999 999 758 261 057 032 300 678 335 152 988 029 931 33(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:


0.000 000 000 003 634 999 999 999 999 758 261 057 032 300 678 335 152 988 029 931 33(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 0.000 000 000 003 634 999 999 999 999 758 261 057 032 300 678 335 152 988 029 931 33 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 0.000 000 000 003 634 999 999 999 999 758 261 057 032 300 678 335 152 988 029 931 94 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 09, 2026 [September]: Decimal Numbers Converted to 64 Bit Double Precision IEEE 754 Binary Floating Point Representation Standard. Calculations performed during the month of: September - by our visitors

» Improve your social skills: The Art of Strategic Ambiguity. Gemini Notebook YouTube Video of 6.59 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