0.000 000 000 003 634 999 999 999 999 758 261 057 032 300 678 335 153 002 4 Converted to 64 Bit Double Precision IEEE 754 Binary Floating Point Representation Standard

Convert decimal 0.000 000 000 003 634 999 999 999 999 758 261 057 032 300 678 335 153 002 4(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
0.000 000 000 003 634 999 999 999 999 758 261 057 032 300 678 335 153 002 4(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: 0.000 000 000 003 634 999 999 999 999 758 261 057 032 300 678 335 153 002 4.

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) 0.000 000 000 003 634 999 999 999 999 758 261 057 032 300 678 335 153 002 4 × 2 = 0 + 0.000 000 000 007 269 999 999 999 999 516 522 114 064 601 356 670 306 004 8;
  • 2) 0.000 000 000 007 269 999 999 999 999 516 522 114 064 601 356 670 306 004 8 × 2 = 0 + 0.000 000 000 014 539 999 999 999 999 033 044 228 129 202 713 340 612 009 6;
  • 3) 0.000 000 000 014 539 999 999 999 999 033 044 228 129 202 713 340 612 009 6 × 2 = 0 + 0.000 000 000 029 079 999 999 999 998 066 088 456 258 405 426 681 224 019 2;
  • 4) 0.000 000 000 029 079 999 999 999 998 066 088 456 258 405 426 681 224 019 2 × 2 = 0 + 0.000 000 000 058 159 999 999 999 996 132 176 912 516 810 853 362 448 038 4;
  • 5) 0.000 000 000 058 159 999 999 999 996 132 176 912 516 810 853 362 448 038 4 × 2 = 0 + 0.000 000 000 116 319 999 999 999 992 264 353 825 033 621 706 724 896 076 8;
  • 6) 0.000 000 000 116 319 999 999 999 992 264 353 825 033 621 706 724 896 076 8 × 2 = 0 + 0.000 000 000 232 639 999 999 999 984 528 707 650 067 243 413 449 792 153 6;
  • 7) 0.000 000 000 232 639 999 999 999 984 528 707 650 067 243 413 449 792 153 6 × 2 = 0 + 0.000 000 000 465 279 999 999 999 969 057 415 300 134 486 826 899 584 307 2;
  • 8) 0.000 000 000 465 279 999 999 999 969 057 415 300 134 486 826 899 584 307 2 × 2 = 0 + 0.000 000 000 930 559 999 999 999 938 114 830 600 268 973 653 799 168 614 4;
  • 9) 0.000 000 000 930 559 999 999 999 938 114 830 600 268 973 653 799 168 614 4 × 2 = 0 + 0.000 000 001 861 119 999 999 999 876 229 661 200 537 947 307 598 337 228 8;
  • 10) 0.000 000 001 861 119 999 999 999 876 229 661 200 537 947 307 598 337 228 8 × 2 = 0 + 0.000 000 003 722 239 999 999 999 752 459 322 401 075 894 615 196 674 457 6;
  • 11) 0.000 000 003 722 239 999 999 999 752 459 322 401 075 894 615 196 674 457 6 × 2 = 0 + 0.000 000 007 444 479 999 999 999 504 918 644 802 151 789 230 393 348 915 2;
  • 12) 0.000 000 007 444 479 999 999 999 504 918 644 802 151 789 230 393 348 915 2 × 2 = 0 + 0.000 000 014 888 959 999 999 999 009 837 289 604 303 578 460 786 697 830 4;
  • 13) 0.000 000 014 888 959 999 999 999 009 837 289 604 303 578 460 786 697 830 4 × 2 = 0 + 0.000 000 029 777 919 999 999 998 019 674 579 208 607 156 921 573 395 660 8;
  • 14) 0.000 000 029 777 919 999 999 998 019 674 579 208 607 156 921 573 395 660 8 × 2 = 0 + 0.000 000 059 555 839 999 999 996 039 349 158 417 214 313 843 146 791 321 6;
  • 15) 0.000 000 059 555 839 999 999 996 039 349 158 417 214 313 843 146 791 321 6 × 2 = 0 + 0.000 000 119 111 679 999 999 992 078 698 316 834 428 627 686 293 582 643 2;
  • 16) 0.000 000 119 111 679 999 999 992 078 698 316 834 428 627 686 293 582 643 2 × 2 = 0 + 0.000 000 238 223 359 999 999 984 157 396 633 668 857 255 372 587 165 286 4;
  • 17) 0.000 000 238 223 359 999 999 984 157 396 633 668 857 255 372 587 165 286 4 × 2 = 0 + 0.000 000 476 446 719 999 999 968 314 793 267 337 714 510 745 174 330 572 8;
  • 18) 0.000 000 476 446 719 999 999 968 314 793 267 337 714 510 745 174 330 572 8 × 2 = 0 + 0.000 000 952 893 439 999 999 936 629 586 534 675 429 021 490 348 661 145 6;
  • 19) 0.000 000 952 893 439 999 999 936 629 586 534 675 429 021 490 348 661 145 6 × 2 = 0 + 0.000 001 905 786 879 999 999 873 259 173 069 350 858 042 980 697 322 291 2;
  • 20) 0.000 001 905 786 879 999 999 873 259 173 069 350 858 042 980 697 322 291 2 × 2 = 0 + 0.000 003 811 573 759 999 999 746 518 346 138 701 716 085 961 394 644 582 4;
  • 21) 0.000 003 811 573 759 999 999 746 518 346 138 701 716 085 961 394 644 582 4 × 2 = 0 + 0.000 007 623 147 519 999 999 493 036 692 277 403 432 171 922 789 289 164 8;
  • 22) 0.000 007 623 147 519 999 999 493 036 692 277 403 432 171 922 789 289 164 8 × 2 = 0 + 0.000 015 246 295 039 999 998 986 073 384 554 806 864 343 845 578 578 329 6;
  • 23) 0.000 015 246 295 039 999 998 986 073 384 554 806 864 343 845 578 578 329 6 × 2 = 0 + 0.000 030 492 590 079 999 997 972 146 769 109 613 728 687 691 157 156 659 2;
  • 24) 0.000 030 492 590 079 999 997 972 146 769 109 613 728 687 691 157 156 659 2 × 2 = 0 + 0.000 060 985 180 159 999 995 944 293 538 219 227 457 375 382 314 313 318 4;
  • 25) 0.000 060 985 180 159 999 995 944 293 538 219 227 457 375 382 314 313 318 4 × 2 = 0 + 0.000 121 970 360 319 999 991 888 587 076 438 454 914 750 764 628 626 636 8;
  • 26) 0.000 121 970 360 319 999 991 888 587 076 438 454 914 750 764 628 626 636 8 × 2 = 0 + 0.000 243 940 720 639 999 983 777 174 152 876 909 829 501 529 257 253 273 6;
  • 27) 0.000 243 940 720 639 999 983 777 174 152 876 909 829 501 529 257 253 273 6 × 2 = 0 + 0.000 487 881 441 279 999 967 554 348 305 753 819 659 003 058 514 506 547 2;
  • 28) 0.000 487 881 441 279 999 967 554 348 305 753 819 659 003 058 514 506 547 2 × 2 = 0 + 0.000 975 762 882 559 999 935 108 696 611 507 639 318 006 117 029 013 094 4;
  • 29) 0.000 975 762 882 559 999 935 108 696 611 507 639 318 006 117 029 013 094 4 × 2 = 0 + 0.001 951 525 765 119 999 870 217 393 223 015 278 636 012 234 058 026 188 8;
  • 30) 0.001 951 525 765 119 999 870 217 393 223 015 278 636 012 234 058 026 188 8 × 2 = 0 + 0.003 903 051 530 239 999 740 434 786 446 030 557 272 024 468 116 052 377 6;
  • 31) 0.003 903 051 530 239 999 740 434 786 446 030 557 272 024 468 116 052 377 6 × 2 = 0 + 0.007 806 103 060 479 999 480 869 572 892 061 114 544 048 936 232 104 755 2;
  • 32) 0.007 806 103 060 479 999 480 869 572 892 061 114 544 048 936 232 104 755 2 × 2 = 0 + 0.015 612 206 120 959 998 961 739 145 784 122 229 088 097 872 464 209 510 4;
  • 33) 0.015 612 206 120 959 998 961 739 145 784 122 229 088 097 872 464 209 510 4 × 2 = 0 + 0.031 224 412 241 919 997 923 478 291 568 244 458 176 195 744 928 419 020 8;
  • 34) 0.031 224 412 241 919 997 923 478 291 568 244 458 176 195 744 928 419 020 8 × 2 = 0 + 0.062 448 824 483 839 995 846 956 583 136 488 916 352 391 489 856 838 041 6;
  • 35) 0.062 448 824 483 839 995 846 956 583 136 488 916 352 391 489 856 838 041 6 × 2 = 0 + 0.124 897 648 967 679 991 693 913 166 272 977 832 704 782 979 713 676 083 2;
  • 36) 0.124 897 648 967 679 991 693 913 166 272 977 832 704 782 979 713 676 083 2 × 2 = 0 + 0.249 795 297 935 359 983 387 826 332 545 955 665 409 565 959 427 352 166 4;
  • 37) 0.249 795 297 935 359 983 387 826 332 545 955 665 409 565 959 427 352 166 4 × 2 = 0 + 0.499 590 595 870 719 966 775 652 665 091 911 330 819 131 918 854 704 332 8;
  • 38) 0.499 590 595 870 719 966 775 652 665 091 911 330 819 131 918 854 704 332 8 × 2 = 0 + 0.999 181 191 741 439 933 551 305 330 183 822 661 638 263 837 709 408 665 6;
  • 39) 0.999 181 191 741 439 933 551 305 330 183 822 661 638 263 837 709 408 665 6 × 2 = 1 + 0.998 362 383 482 879 867 102 610 660 367 645 323 276 527 675 418 817 331 2;
  • 40) 0.998 362 383 482 879 867 102 610 660 367 645 323 276 527 675 418 817 331 2 × 2 = 1 + 0.996 724 766 965 759 734 205 221 320 735 290 646 553 055 350 837 634 662 4;
  • 41) 0.996 724 766 965 759 734 205 221 320 735 290 646 553 055 350 837 634 662 4 × 2 = 1 + 0.993 449 533 931 519 468 410 442 641 470 581 293 106 110 701 675 269 324 8;
  • 42) 0.993 449 533 931 519 468 410 442 641 470 581 293 106 110 701 675 269 324 8 × 2 = 1 + 0.986 899 067 863 038 936 820 885 282 941 162 586 212 221 403 350 538 649 6;
  • 43) 0.986 899 067 863 038 936 820 885 282 941 162 586 212 221 403 350 538 649 6 × 2 = 1 + 0.973 798 135 726 077 873 641 770 565 882 325 172 424 442 806 701 077 299 2;
  • 44) 0.973 798 135 726 077 873 641 770 565 882 325 172 424 442 806 701 077 299 2 × 2 = 1 + 0.947 596 271 452 155 747 283 541 131 764 650 344 848 885 613 402 154 598 4;
  • 45) 0.947 596 271 452 155 747 283 541 131 764 650 344 848 885 613 402 154 598 4 × 2 = 1 + 0.895 192 542 904 311 494 567 082 263 529 300 689 697 771 226 804 309 196 8;
  • 46) 0.895 192 542 904 311 494 567 082 263 529 300 689 697 771 226 804 309 196 8 × 2 = 1 + 0.790 385 085 808 622 989 134 164 527 058 601 379 395 542 453 608 618 393 6;
  • 47) 0.790 385 085 808 622 989 134 164 527 058 601 379 395 542 453 608 618 393 6 × 2 = 1 + 0.580 770 171 617 245 978 268 329 054 117 202 758 791 084 907 217 236 787 2;
  • 48) 0.580 770 171 617 245 978 268 329 054 117 202 758 791 084 907 217 236 787 2 × 2 = 1 + 0.161 540 343 234 491 956 536 658 108 234 405 517 582 169 814 434 473 574 4;
  • 49) 0.161 540 343 234 491 956 536 658 108 234 405 517 582 169 814 434 473 574 4 × 2 = 0 + 0.323 080 686 468 983 913 073 316 216 468 811 035 164 339 628 868 947 148 8;
  • 50) 0.323 080 686 468 983 913 073 316 216 468 811 035 164 339 628 868 947 148 8 × 2 = 0 + 0.646 161 372 937 967 826 146 632 432 937 622 070 328 679 257 737 894 297 6;
  • 51) 0.646 161 372 937 967 826 146 632 432 937 622 070 328 679 257 737 894 297 6 × 2 = 1 + 0.292 322 745 875 935 652 293 264 865 875 244 140 657 358 515 475 788 595 2;
  • 52) 0.292 322 745 875 935 652 293 264 865 875 244 140 657 358 515 475 788 595 2 × 2 = 0 + 0.584 645 491 751 871 304 586 529 731 750 488 281 314 717 030 951 577 190 4;
  • 53) 0.584 645 491 751 871 304 586 529 731 750 488 281 314 717 030 951 577 190 4 × 2 = 1 + 0.169 290 983 503 742 609 173 059 463 500 976 562 629 434 061 903 154 380 8;
  • 54) 0.169 290 983 503 742 609 173 059 463 500 976 562 629 434 061 903 154 380 8 × 2 = 0 + 0.338 581 967 007 485 218 346 118 927 001 953 125 258 868 123 806 308 761 6;
  • 55) 0.338 581 967 007 485 218 346 118 927 001 953 125 258 868 123 806 308 761 6 × 2 = 0 + 0.677 163 934 014 970 436 692 237 854 003 906 250 517 736 247 612 617 523 2;
  • 56) 0.677 163 934 014 970 436 692 237 854 003 906 250 517 736 247 612 617 523 2 × 2 = 1 + 0.354 327 868 029 940 873 384 475 708 007 812 501 035 472 495 225 235 046 4;
  • 57) 0.354 327 868 029 940 873 384 475 708 007 812 501 035 472 495 225 235 046 4 × 2 = 0 + 0.708 655 736 059 881 746 768 951 416 015 625 002 070 944 990 450 470 092 8;
  • 58) 0.708 655 736 059 881 746 768 951 416 015 625 002 070 944 990 450 470 092 8 × 2 = 1 + 0.417 311 472 119 763 493 537 902 832 031 250 004 141 889 980 900 940 185 6;
  • 59) 0.417 311 472 119 763 493 537 902 832 031 250 004 141 889 980 900 940 185 6 × 2 = 0 + 0.834 622 944 239 526 987 075 805 664 062 500 008 283 779 961 801 880 371 2;
  • 60) 0.834 622 944 239 526 987 075 805 664 062 500 008 283 779 961 801 880 371 2 × 2 = 1 + 0.669 245 888 479 053 974 151 611 328 125 000 016 567 559 923 603 760 742 4;
  • 61) 0.669 245 888 479 053 974 151 611 328 125 000 016 567 559 923 603 760 742 4 × 2 = 1 + 0.338 491 776 958 107 948 303 222 656 250 000 033 135 119 847 207 521 484 8;
  • 62) 0.338 491 776 958 107 948 303 222 656 250 000 033 135 119 847 207 521 484 8 × 2 = 0 + 0.676 983 553 916 215 896 606 445 312 500 000 066 270 239 694 415 042 969 6;
  • 63) 0.676 983 553 916 215 896 606 445 312 500 000 066 270 239 694 415 042 969 6 × 2 = 1 + 0.353 967 107 832 431 793 212 890 625 000 000 132 540 479 388 830 085 939 2;
  • 64) 0.353 967 107 832 431 793 212 890 625 000 000 132 540 479 388 830 085 939 2 × 2 = 0 + 0.707 934 215 664 863 586 425 781 250 000 000 265 080 958 777 660 171 878 4;
  • 65) 0.707 934 215 664 863 586 425 781 250 000 000 265 080 958 777 660 171 878 4 × 2 = 1 + 0.415 868 431 329 727 172 851 562 500 000 000 530 161 917 555 320 343 756 8;
  • 66) 0.415 868 431 329 727 172 851 562 500 000 000 530 161 917 555 320 343 756 8 × 2 = 0 + 0.831 736 862 659 454 345 703 125 000 000 001 060 323 835 110 640 687 513 6;
  • 67) 0.831 736 862 659 454 345 703 125 000 000 001 060 323 835 110 640 687 513 6 × 2 = 1 + 0.663 473 725 318 908 691 406 250 000 000 002 120 647 670 221 281 375 027 2;
  • 68) 0.663 473 725 318 908 691 406 250 000 000 002 120 647 670 221 281 375 027 2 × 2 = 1 + 0.326 947 450 637 817 382 812 500 000 000 004 241 295 340 442 562 750 054 4;
  • 69) 0.326 947 450 637 817 382 812 500 000 000 004 241 295 340 442 562 750 054 4 × 2 = 0 + 0.653 894 901 275 634 765 625 000 000 000 008 482 590 680 885 125 500 108 8;
  • 70) 0.653 894 901 275 634 765 625 000 000 000 008 482 590 680 885 125 500 108 8 × 2 = 1 + 0.307 789 802 551 269 531 250 000 000 000 016 965 181 361 770 251 000 217 6;
  • 71) 0.307 789 802 551 269 531 250 000 000 000 016 965 181 361 770 251 000 217 6 × 2 = 0 + 0.615 579 605 102 539 062 500 000 000 000 033 930 362 723 540 502 000 435 2;
  • 72) 0.615 579 605 102 539 062 500 000 000 000 033 930 362 723 540 502 000 435 2 × 2 = 1 + 0.231 159 210 205 078 125 000 000 000 000 067 860 725 447 081 004 000 870 4;
  • 73) 0.231 159 210 205 078 125 000 000 000 000 067 860 725 447 081 004 000 870 4 × 2 = 0 + 0.462 318 420 410 156 250 000 000 000 000 135 721 450 894 162 008 001 740 8;
  • 74) 0.462 318 420 410 156 250 000 000 000 000 135 721 450 894 162 008 001 740 8 × 2 = 0 + 0.924 636 840 820 312 500 000 000 000 000 271 442 901 788 324 016 003 481 6;
  • 75) 0.924 636 840 820 312 500 000 000 000 000 271 442 901 788 324 016 003 481 6 × 2 = 1 + 0.849 273 681 640 625 000 000 000 000 000 542 885 803 576 648 032 006 963 2;
  • 76) 0.849 273 681 640 625 000 000 000 000 000 542 885 803 576 648 032 006 963 2 × 2 = 1 + 0.698 547 363 281 250 000 000 000 000 001 085 771 607 153 296 064 013 926 4;
  • 77) 0.698 547 363 281 250 000 000 000 000 001 085 771 607 153 296 064 013 926 4 × 2 = 1 + 0.397 094 726 562 500 000 000 000 000 002 171 543 214 306 592 128 027 852 8;
  • 78) 0.397 094 726 562 500 000 000 000 000 002 171 543 214 306 592 128 027 852 8 × 2 = 0 + 0.794 189 453 125 000 000 000 000 000 004 343 086 428 613 184 256 055 705 6;
  • 79) 0.794 189 453 125 000 000 000 000 000 004 343 086 428 613 184 256 055 705 6 × 2 = 1 + 0.588 378 906 250 000 000 000 000 000 008 686 172 857 226 368 512 111 411 2;
  • 80) 0.588 378 906 250 000 000 000 000 000 008 686 172 857 226 368 512 111 411 2 × 2 = 1 + 0.176 757 812 500 000 000 000 000 000 017 372 345 714 452 737 024 222 822 4;
  • 81) 0.176 757 812 500 000 000 000 000 000 017 372 345 714 452 737 024 222 822 4 × 2 = 0 + 0.353 515 625 000 000 000 000 000 000 034 744 691 428 905 474 048 445 644 8;
  • 82) 0.353 515 625 000 000 000 000 000 000 034 744 691 428 905 474 048 445 644 8 × 2 = 0 + 0.707 031 250 000 000 000 000 000 000 069 489 382 857 810 948 096 891 289 6;
  • 83) 0.707 031 250 000 000 000 000 000 000 069 489 382 857 810 948 096 891 289 6 × 2 = 1 + 0.414 062 500 000 000 000 000 000 000 138 978 765 715 621 896 193 782 579 2;
  • 84) 0.414 062 500 000 000 000 000 000 000 138 978 765 715 621 896 193 782 579 2 × 2 = 0 + 0.828 125 000 000 000 000 000 000 000 277 957 531 431 243 792 387 565 158 4;
  • 85) 0.828 125 000 000 000 000 000 000 000 277 957 531 431 243 792 387 565 158 4 × 2 = 1 + 0.656 250 000 000 000 000 000 000 000 555 915 062 862 487 584 775 130 316 8;
  • 86) 0.656 250 000 000 000 000 000 000 000 555 915 062 862 487 584 775 130 316 8 × 2 = 1 + 0.312 500 000 000 000 000 000 000 001 111 830 125 724 975 169 550 260 633 6;
  • 87) 0.312 500 000 000 000 000 000 000 001 111 830 125 724 975 169 550 260 633 6 × 2 = 0 + 0.625 000 000 000 000 000 000 000 002 223 660 251 449 950 339 100 521 267 2;
  • 88) 0.625 000 000 000 000 000 000 000 002 223 660 251 449 950 339 100 521 267 2 × 2 = 1 + 0.250 000 000 000 000 000 000 000 004 447 320 502 899 900 678 201 042 534 4;
  • 89) 0.250 000 000 000 000 000 000 000 004 447 320 502 899 900 678 201 042 534 4 × 2 = 0 + 0.500 000 000 000 000 000 000 000 008 894 641 005 799 801 356 402 085 068 8;
  • 90) 0.500 000 000 000 000 000 000 000 008 894 641 005 799 801 356 402 085 068 8 × 2 = 1 + 0.000 000 000 000 000 000 000 000 017 789 282 011 599 602 712 804 170 137 6;
  • 91) 0.000 000 000 000 000 000 000 000 017 789 282 011 599 602 712 804 170 137 6 × 2 = 0 + 0.000 000 000 000 000 000 000 000 035 578 564 023 199 205 425 608 340 275 2;

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:


0.000 000 000 003 634 999 999 999 999 758 261 057 032 300 678 335 153 002 4(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:

0.000 000 000 003 634 999 999 999 999 758 261 057 032 300 678 335 153 002 4(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:


0.000 000 000 003 634 999 999 999 999 758 261 057 032 300 678 335 153 002 4(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 0.000 000 000 003 634 999 999 999 999 758 261 057 032 300 678 335 153 002 4 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 0.000 000 000 003 634 999 999 999 999 758 261 057 032 300 678 335 153 011 8 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: Your Greatest Competitor, Your Most Powerful Ally. NotebookLM YouTube Video of 7.54 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