0.000 000 000 003 634 999 999 999 999 758 261 057 032 300 678 335 152 988 031 11 Converted to 64 Bit Double Precision IEEE 754 Binary Floating Point Representation Standard

Convert decimal 0.000 000 000 003 634 999 999 999 999 758 261 057 032 300 678 335 152 988 031 11(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
0.000 000 000 003 634 999 999 999 999 758 261 057 032 300 678 335 152 988 031 11(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: 0.000 000 000 003 634 999 999 999 999 758 261 057 032 300 678 335 152 988 031 11.

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) 0.000 000 000 003 634 999 999 999 999 758 261 057 032 300 678 335 152 988 031 11 × 2 = 0 + 0.000 000 000 007 269 999 999 999 999 516 522 114 064 601 356 670 305 976 062 22;
  • 2) 0.000 000 000 007 269 999 999 999 999 516 522 114 064 601 356 670 305 976 062 22 × 2 = 0 + 0.000 000 000 014 539 999 999 999 999 033 044 228 129 202 713 340 611 952 124 44;
  • 3) 0.000 000 000 014 539 999 999 999 999 033 044 228 129 202 713 340 611 952 124 44 × 2 = 0 + 0.000 000 000 029 079 999 999 999 998 066 088 456 258 405 426 681 223 904 248 88;
  • 4) 0.000 000 000 029 079 999 999 999 998 066 088 456 258 405 426 681 223 904 248 88 × 2 = 0 + 0.000 000 000 058 159 999 999 999 996 132 176 912 516 810 853 362 447 808 497 76;
  • 5) 0.000 000 000 058 159 999 999 999 996 132 176 912 516 810 853 362 447 808 497 76 × 2 = 0 + 0.000 000 000 116 319 999 999 999 992 264 353 825 033 621 706 724 895 616 995 52;
  • 6) 0.000 000 000 116 319 999 999 999 992 264 353 825 033 621 706 724 895 616 995 52 × 2 = 0 + 0.000 000 000 232 639 999 999 999 984 528 707 650 067 243 413 449 791 233 991 04;
  • 7) 0.000 000 000 232 639 999 999 999 984 528 707 650 067 243 413 449 791 233 991 04 × 2 = 0 + 0.000 000 000 465 279 999 999 999 969 057 415 300 134 486 826 899 582 467 982 08;
  • 8) 0.000 000 000 465 279 999 999 999 969 057 415 300 134 486 826 899 582 467 982 08 × 2 = 0 + 0.000 000 000 930 559 999 999 999 938 114 830 600 268 973 653 799 164 935 964 16;
  • 9) 0.000 000 000 930 559 999 999 999 938 114 830 600 268 973 653 799 164 935 964 16 × 2 = 0 + 0.000 000 001 861 119 999 999 999 876 229 661 200 537 947 307 598 329 871 928 32;
  • 10) 0.000 000 001 861 119 999 999 999 876 229 661 200 537 947 307 598 329 871 928 32 × 2 = 0 + 0.000 000 003 722 239 999 999 999 752 459 322 401 075 894 615 196 659 743 856 64;
  • 11) 0.000 000 003 722 239 999 999 999 752 459 322 401 075 894 615 196 659 743 856 64 × 2 = 0 + 0.000 000 007 444 479 999 999 999 504 918 644 802 151 789 230 393 319 487 713 28;
  • 12) 0.000 000 007 444 479 999 999 999 504 918 644 802 151 789 230 393 319 487 713 28 × 2 = 0 + 0.000 000 014 888 959 999 999 999 009 837 289 604 303 578 460 786 638 975 426 56;
  • 13) 0.000 000 014 888 959 999 999 999 009 837 289 604 303 578 460 786 638 975 426 56 × 2 = 0 + 0.000 000 029 777 919 999 999 998 019 674 579 208 607 156 921 573 277 950 853 12;
  • 14) 0.000 000 029 777 919 999 999 998 019 674 579 208 607 156 921 573 277 950 853 12 × 2 = 0 + 0.000 000 059 555 839 999 999 996 039 349 158 417 214 313 843 146 555 901 706 24;
  • 15) 0.000 000 059 555 839 999 999 996 039 349 158 417 214 313 843 146 555 901 706 24 × 2 = 0 + 0.000 000 119 111 679 999 999 992 078 698 316 834 428 627 686 293 111 803 412 48;
  • 16) 0.000 000 119 111 679 999 999 992 078 698 316 834 428 627 686 293 111 803 412 48 × 2 = 0 + 0.000 000 238 223 359 999 999 984 157 396 633 668 857 255 372 586 223 606 824 96;
  • 17) 0.000 000 238 223 359 999 999 984 157 396 633 668 857 255 372 586 223 606 824 96 × 2 = 0 + 0.000 000 476 446 719 999 999 968 314 793 267 337 714 510 745 172 447 213 649 92;
  • 18) 0.000 000 476 446 719 999 999 968 314 793 267 337 714 510 745 172 447 213 649 92 × 2 = 0 + 0.000 000 952 893 439 999 999 936 629 586 534 675 429 021 490 344 894 427 299 84;
  • 19) 0.000 000 952 893 439 999 999 936 629 586 534 675 429 021 490 344 894 427 299 84 × 2 = 0 + 0.000 001 905 786 879 999 999 873 259 173 069 350 858 042 980 689 788 854 599 68;
  • 20) 0.000 001 905 786 879 999 999 873 259 173 069 350 858 042 980 689 788 854 599 68 × 2 = 0 + 0.000 003 811 573 759 999 999 746 518 346 138 701 716 085 961 379 577 709 199 36;
  • 21) 0.000 003 811 573 759 999 999 746 518 346 138 701 716 085 961 379 577 709 199 36 × 2 = 0 + 0.000 007 623 147 519 999 999 493 036 692 277 403 432 171 922 759 155 418 398 72;
  • 22) 0.000 007 623 147 519 999 999 493 036 692 277 403 432 171 922 759 155 418 398 72 × 2 = 0 + 0.000 015 246 295 039 999 998 986 073 384 554 806 864 343 845 518 310 836 797 44;
  • 23) 0.000 015 246 295 039 999 998 986 073 384 554 806 864 343 845 518 310 836 797 44 × 2 = 0 + 0.000 030 492 590 079 999 997 972 146 769 109 613 728 687 691 036 621 673 594 88;
  • 24) 0.000 030 492 590 079 999 997 972 146 769 109 613 728 687 691 036 621 673 594 88 × 2 = 0 + 0.000 060 985 180 159 999 995 944 293 538 219 227 457 375 382 073 243 347 189 76;
  • 25) 0.000 060 985 180 159 999 995 944 293 538 219 227 457 375 382 073 243 347 189 76 × 2 = 0 + 0.000 121 970 360 319 999 991 888 587 076 438 454 914 750 764 146 486 694 379 52;
  • 26) 0.000 121 970 360 319 999 991 888 587 076 438 454 914 750 764 146 486 694 379 52 × 2 = 0 + 0.000 243 940 720 639 999 983 777 174 152 876 909 829 501 528 292 973 388 759 04;
  • 27) 0.000 243 940 720 639 999 983 777 174 152 876 909 829 501 528 292 973 388 759 04 × 2 = 0 + 0.000 487 881 441 279 999 967 554 348 305 753 819 659 003 056 585 946 777 518 08;
  • 28) 0.000 487 881 441 279 999 967 554 348 305 753 819 659 003 056 585 946 777 518 08 × 2 = 0 + 0.000 975 762 882 559 999 935 108 696 611 507 639 318 006 113 171 893 555 036 16;
  • 29) 0.000 975 762 882 559 999 935 108 696 611 507 639 318 006 113 171 893 555 036 16 × 2 = 0 + 0.001 951 525 765 119 999 870 217 393 223 015 278 636 012 226 343 787 110 072 32;
  • 30) 0.001 951 525 765 119 999 870 217 393 223 015 278 636 012 226 343 787 110 072 32 × 2 = 0 + 0.003 903 051 530 239 999 740 434 786 446 030 557 272 024 452 687 574 220 144 64;
  • 31) 0.003 903 051 530 239 999 740 434 786 446 030 557 272 024 452 687 574 220 144 64 × 2 = 0 + 0.007 806 103 060 479 999 480 869 572 892 061 114 544 048 905 375 148 440 289 28;
  • 32) 0.007 806 103 060 479 999 480 869 572 892 061 114 544 048 905 375 148 440 289 28 × 2 = 0 + 0.015 612 206 120 959 998 961 739 145 784 122 229 088 097 810 750 296 880 578 56;
  • 33) 0.015 612 206 120 959 998 961 739 145 784 122 229 088 097 810 750 296 880 578 56 × 2 = 0 + 0.031 224 412 241 919 997 923 478 291 568 244 458 176 195 621 500 593 761 157 12;
  • 34) 0.031 224 412 241 919 997 923 478 291 568 244 458 176 195 621 500 593 761 157 12 × 2 = 0 + 0.062 448 824 483 839 995 846 956 583 136 488 916 352 391 243 001 187 522 314 24;
  • 35) 0.062 448 824 483 839 995 846 956 583 136 488 916 352 391 243 001 187 522 314 24 × 2 = 0 + 0.124 897 648 967 679 991 693 913 166 272 977 832 704 782 486 002 375 044 628 48;
  • 36) 0.124 897 648 967 679 991 693 913 166 272 977 832 704 782 486 002 375 044 628 48 × 2 = 0 + 0.249 795 297 935 359 983 387 826 332 545 955 665 409 564 972 004 750 089 256 96;
  • 37) 0.249 795 297 935 359 983 387 826 332 545 955 665 409 564 972 004 750 089 256 96 × 2 = 0 + 0.499 590 595 870 719 966 775 652 665 091 911 330 819 129 944 009 500 178 513 92;
  • 38) 0.499 590 595 870 719 966 775 652 665 091 911 330 819 129 944 009 500 178 513 92 × 2 = 0 + 0.999 181 191 741 439 933 551 305 330 183 822 661 638 259 888 019 000 357 027 84;
  • 39) 0.999 181 191 741 439 933 551 305 330 183 822 661 638 259 888 019 000 357 027 84 × 2 = 1 + 0.998 362 383 482 879 867 102 610 660 367 645 323 276 519 776 038 000 714 055 68;
  • 40) 0.998 362 383 482 879 867 102 610 660 367 645 323 276 519 776 038 000 714 055 68 × 2 = 1 + 0.996 724 766 965 759 734 205 221 320 735 290 646 553 039 552 076 001 428 111 36;
  • 41) 0.996 724 766 965 759 734 205 221 320 735 290 646 553 039 552 076 001 428 111 36 × 2 = 1 + 0.993 449 533 931 519 468 410 442 641 470 581 293 106 079 104 152 002 856 222 72;
  • 42) 0.993 449 533 931 519 468 410 442 641 470 581 293 106 079 104 152 002 856 222 72 × 2 = 1 + 0.986 899 067 863 038 936 820 885 282 941 162 586 212 158 208 304 005 712 445 44;
  • 43) 0.986 899 067 863 038 936 820 885 282 941 162 586 212 158 208 304 005 712 445 44 × 2 = 1 + 0.973 798 135 726 077 873 641 770 565 882 325 172 424 316 416 608 011 424 890 88;
  • 44) 0.973 798 135 726 077 873 641 770 565 882 325 172 424 316 416 608 011 424 890 88 × 2 = 1 + 0.947 596 271 452 155 747 283 541 131 764 650 344 848 632 833 216 022 849 781 76;
  • 45) 0.947 596 271 452 155 747 283 541 131 764 650 344 848 632 833 216 022 849 781 76 × 2 = 1 + 0.895 192 542 904 311 494 567 082 263 529 300 689 697 265 666 432 045 699 563 52;
  • 46) 0.895 192 542 904 311 494 567 082 263 529 300 689 697 265 666 432 045 699 563 52 × 2 = 1 + 0.790 385 085 808 622 989 134 164 527 058 601 379 394 531 332 864 091 399 127 04;
  • 47) 0.790 385 085 808 622 989 134 164 527 058 601 379 394 531 332 864 091 399 127 04 × 2 = 1 + 0.580 770 171 617 245 978 268 329 054 117 202 758 789 062 665 728 182 798 254 08;
  • 48) 0.580 770 171 617 245 978 268 329 054 117 202 758 789 062 665 728 182 798 254 08 × 2 = 1 + 0.161 540 343 234 491 956 536 658 108 234 405 517 578 125 331 456 365 596 508 16;
  • 49) 0.161 540 343 234 491 956 536 658 108 234 405 517 578 125 331 456 365 596 508 16 × 2 = 0 + 0.323 080 686 468 983 913 073 316 216 468 811 035 156 250 662 912 731 193 016 32;
  • 50) 0.323 080 686 468 983 913 073 316 216 468 811 035 156 250 662 912 731 193 016 32 × 2 = 0 + 0.646 161 372 937 967 826 146 632 432 937 622 070 312 501 325 825 462 386 032 64;
  • 51) 0.646 161 372 937 967 826 146 632 432 937 622 070 312 501 325 825 462 386 032 64 × 2 = 1 + 0.292 322 745 875 935 652 293 264 865 875 244 140 625 002 651 650 924 772 065 28;
  • 52) 0.292 322 745 875 935 652 293 264 865 875 244 140 625 002 651 650 924 772 065 28 × 2 = 0 + 0.584 645 491 751 871 304 586 529 731 750 488 281 250 005 303 301 849 544 130 56;
  • 53) 0.584 645 491 751 871 304 586 529 731 750 488 281 250 005 303 301 849 544 130 56 × 2 = 1 + 0.169 290 983 503 742 609 173 059 463 500 976 562 500 010 606 603 699 088 261 12;
  • 54) 0.169 290 983 503 742 609 173 059 463 500 976 562 500 010 606 603 699 088 261 12 × 2 = 0 + 0.338 581 967 007 485 218 346 118 927 001 953 125 000 021 213 207 398 176 522 24;
  • 55) 0.338 581 967 007 485 218 346 118 927 001 953 125 000 021 213 207 398 176 522 24 × 2 = 0 + 0.677 163 934 014 970 436 692 237 854 003 906 250 000 042 426 414 796 353 044 48;
  • 56) 0.677 163 934 014 970 436 692 237 854 003 906 250 000 042 426 414 796 353 044 48 × 2 = 1 + 0.354 327 868 029 940 873 384 475 708 007 812 500 000 084 852 829 592 706 088 96;
  • 57) 0.354 327 868 029 940 873 384 475 708 007 812 500 000 084 852 829 592 706 088 96 × 2 = 0 + 0.708 655 736 059 881 746 768 951 416 015 625 000 000 169 705 659 185 412 177 92;
  • 58) 0.708 655 736 059 881 746 768 951 416 015 625 000 000 169 705 659 185 412 177 92 × 2 = 1 + 0.417 311 472 119 763 493 537 902 832 031 250 000 000 339 411 318 370 824 355 84;
  • 59) 0.417 311 472 119 763 493 537 902 832 031 250 000 000 339 411 318 370 824 355 84 × 2 = 0 + 0.834 622 944 239 526 987 075 805 664 062 500 000 000 678 822 636 741 648 711 68;
  • 60) 0.834 622 944 239 526 987 075 805 664 062 500 000 000 678 822 636 741 648 711 68 × 2 = 1 + 0.669 245 888 479 053 974 151 611 328 125 000 000 001 357 645 273 483 297 423 36;
  • 61) 0.669 245 888 479 053 974 151 611 328 125 000 000 001 357 645 273 483 297 423 36 × 2 = 1 + 0.338 491 776 958 107 948 303 222 656 250 000 000 002 715 290 546 966 594 846 72;
  • 62) 0.338 491 776 958 107 948 303 222 656 250 000 000 002 715 290 546 966 594 846 72 × 2 = 0 + 0.676 983 553 916 215 896 606 445 312 500 000 000 005 430 581 093 933 189 693 44;
  • 63) 0.676 983 553 916 215 896 606 445 312 500 000 000 005 430 581 093 933 189 693 44 × 2 = 1 + 0.353 967 107 832 431 793 212 890 625 000 000 000 010 861 162 187 866 379 386 88;
  • 64) 0.353 967 107 832 431 793 212 890 625 000 000 000 010 861 162 187 866 379 386 88 × 2 = 0 + 0.707 934 215 664 863 586 425 781 250 000 000 000 021 722 324 375 732 758 773 76;
  • 65) 0.707 934 215 664 863 586 425 781 250 000 000 000 021 722 324 375 732 758 773 76 × 2 = 1 + 0.415 868 431 329 727 172 851 562 500 000 000 000 043 444 648 751 465 517 547 52;
  • 66) 0.415 868 431 329 727 172 851 562 500 000 000 000 043 444 648 751 465 517 547 52 × 2 = 0 + 0.831 736 862 659 454 345 703 125 000 000 000 000 086 889 297 502 931 035 095 04;
  • 67) 0.831 736 862 659 454 345 703 125 000 000 000 000 086 889 297 502 931 035 095 04 × 2 = 1 + 0.663 473 725 318 908 691 406 250 000 000 000 000 173 778 595 005 862 070 190 08;
  • 68) 0.663 473 725 318 908 691 406 250 000 000 000 000 173 778 595 005 862 070 190 08 × 2 = 1 + 0.326 947 450 637 817 382 812 500 000 000 000 000 347 557 190 011 724 140 380 16;
  • 69) 0.326 947 450 637 817 382 812 500 000 000 000 000 347 557 190 011 724 140 380 16 × 2 = 0 + 0.653 894 901 275 634 765 625 000 000 000 000 000 695 114 380 023 448 280 760 32;
  • 70) 0.653 894 901 275 634 765 625 000 000 000 000 000 695 114 380 023 448 280 760 32 × 2 = 1 + 0.307 789 802 551 269 531 250 000 000 000 000 001 390 228 760 046 896 561 520 64;
  • 71) 0.307 789 802 551 269 531 250 000 000 000 000 001 390 228 760 046 896 561 520 64 × 2 = 0 + 0.615 579 605 102 539 062 500 000 000 000 000 002 780 457 520 093 793 123 041 28;
  • 72) 0.615 579 605 102 539 062 500 000 000 000 000 002 780 457 520 093 793 123 041 28 × 2 = 1 + 0.231 159 210 205 078 125 000 000 000 000 000 005 560 915 040 187 586 246 082 56;
  • 73) 0.231 159 210 205 078 125 000 000 000 000 000 005 560 915 040 187 586 246 082 56 × 2 = 0 + 0.462 318 420 410 156 250 000 000 000 000 000 011 121 830 080 375 172 492 165 12;
  • 74) 0.462 318 420 410 156 250 000 000 000 000 000 011 121 830 080 375 172 492 165 12 × 2 = 0 + 0.924 636 840 820 312 500 000 000 000 000 000 022 243 660 160 750 344 984 330 24;
  • 75) 0.924 636 840 820 312 500 000 000 000 000 000 022 243 660 160 750 344 984 330 24 × 2 = 1 + 0.849 273 681 640 625 000 000 000 000 000 000 044 487 320 321 500 689 968 660 48;
  • 76) 0.849 273 681 640 625 000 000 000 000 000 000 044 487 320 321 500 689 968 660 48 × 2 = 1 + 0.698 547 363 281 250 000 000 000 000 000 000 088 974 640 643 001 379 937 320 96;
  • 77) 0.698 547 363 281 250 000 000 000 000 000 000 088 974 640 643 001 379 937 320 96 × 2 = 1 + 0.397 094 726 562 500 000 000 000 000 000 000 177 949 281 286 002 759 874 641 92;
  • 78) 0.397 094 726 562 500 000 000 000 000 000 000 177 949 281 286 002 759 874 641 92 × 2 = 0 + 0.794 189 453 125 000 000 000 000 000 000 000 355 898 562 572 005 519 749 283 84;
  • 79) 0.794 189 453 125 000 000 000 000 000 000 000 355 898 562 572 005 519 749 283 84 × 2 = 1 + 0.588 378 906 250 000 000 000 000 000 000 000 711 797 125 144 011 039 498 567 68;
  • 80) 0.588 378 906 250 000 000 000 000 000 000 000 711 797 125 144 011 039 498 567 68 × 2 = 1 + 0.176 757 812 500 000 000 000 000 000 000 001 423 594 250 288 022 078 997 135 36;
  • 81) 0.176 757 812 500 000 000 000 000 000 000 001 423 594 250 288 022 078 997 135 36 × 2 = 0 + 0.353 515 625 000 000 000 000 000 000 000 002 847 188 500 576 044 157 994 270 72;
  • 82) 0.353 515 625 000 000 000 000 000 000 000 002 847 188 500 576 044 157 994 270 72 × 2 = 0 + 0.707 031 250 000 000 000 000 000 000 000 005 694 377 001 152 088 315 988 541 44;
  • 83) 0.707 031 250 000 000 000 000 000 000 000 005 694 377 001 152 088 315 988 541 44 × 2 = 1 + 0.414 062 500 000 000 000 000 000 000 000 011 388 754 002 304 176 631 977 082 88;
  • 84) 0.414 062 500 000 000 000 000 000 000 000 011 388 754 002 304 176 631 977 082 88 × 2 = 0 + 0.828 125 000 000 000 000 000 000 000 000 022 777 508 004 608 353 263 954 165 76;
  • 85) 0.828 125 000 000 000 000 000 000 000 000 022 777 508 004 608 353 263 954 165 76 × 2 = 1 + 0.656 250 000 000 000 000 000 000 000 000 045 555 016 009 216 706 527 908 331 52;
  • 86) 0.656 250 000 000 000 000 000 000 000 000 045 555 016 009 216 706 527 908 331 52 × 2 = 1 + 0.312 500 000 000 000 000 000 000 000 000 091 110 032 018 433 413 055 816 663 04;
  • 87) 0.312 500 000 000 000 000 000 000 000 000 091 110 032 018 433 413 055 816 663 04 × 2 = 0 + 0.625 000 000 000 000 000 000 000 000 000 182 220 064 036 866 826 111 633 326 08;
  • 88) 0.625 000 000 000 000 000 000 000 000 000 182 220 064 036 866 826 111 633 326 08 × 2 = 1 + 0.250 000 000 000 000 000 000 000 000 000 364 440 128 073 733 652 223 266 652 16;
  • 89) 0.250 000 000 000 000 000 000 000 000 000 364 440 128 073 733 652 223 266 652 16 × 2 = 0 + 0.500 000 000 000 000 000 000 000 000 000 728 880 256 147 467 304 446 533 304 32;
  • 90) 0.500 000 000 000 000 000 000 000 000 000 728 880 256 147 467 304 446 533 304 32 × 2 = 1 + 0.000 000 000 000 000 000 000 000 000 001 457 760 512 294 934 608 893 066 608 64;
  • 91) 0.000 000 000 000 000 000 000 000 000 001 457 760 512 294 934 608 893 066 608 64 × 2 = 0 + 0.000 000 000 000 000 000 000 000 000 002 915 521 024 589 869 217 786 133 217 28;

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:


0.000 000 000 003 634 999 999 999 999 758 261 057 032 300 678 335 152 988 031 11(10) =

0.0000 0000 0000 0000 0000 0000 0000 0000 0000 0011 1111 1111 0010 1001 0101 1010 1011 0101 0011 1011 0010 1101 010(2)

5. Positive number before normalization:

0.000 000 000 003 634 999 999 999 999 758 261 057 032 300 678 335 152 988 031 11(10) =

0.0000 0000 0000 0000 0000 0000 0000 0000 0000 0011 1111 1111 0010 1001 0101 1010 1011 0101 0011 1011 0010 1101 010(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:


0.000 000 000 003 634 999 999 999 999 758 261 057 032 300 678 335 152 988 031 11(10) =

0.0000 0000 0000 0000 0000 0000 0000 0000 0000 0011 1111 1111 0010 1001 0101 1010 1011 0101 0011 1011 0010 1101 010(2) =

0.0000 0000 0000 0000 0000 0000 0000 0000 0000 0011 1111 1111 0010 1001 0101 1010 1011 0101 0011 1011 0010 1101 010(2) × 20 =

1.1111 1111 1001 0100 1010 1101 0101 1010 1001 1101 1001 0110 1010(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 1010


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 1010 =

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


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 1010


Decimal number 0.000 000 000 003 634 999 999 999 999 758 261 057 032 300 678 335 152 988 031 11 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 1010

Share

» Convert decimal 0.000 000 000 003 634 999 999 999 999 758 261 057 032 300 678 335 152 988 031 1 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 Hidden Requirement in Every Single Job Description. NotebookLM YouTube Video of 8.15 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