Making 1% Resistor Values from 5%

It is easy to create any of the 1% resistor values (E96 sequence) by paralleling two 5% values (E24 sequence) values. Both sequences are available in tolerances down to 0.025% and even lower, so using E24 sequence values to create E96 "1%" resistor values is a valid option, provided a tight enough tolerance is available. Some calculated combinations are composed of two identical or close values, but some are composed of values that are far apart in resistance. In these cases, the lower value resistor must be higher precision than the other.

The calculater only shows how to form values from 100 to 976 ohms, but it is easy to scale these numbers up or down by 10 to make other decades. For example, if you want 10.2k ohms, you can form it with an 12k ohm in parallel with a 68k ohm resistor.

Enter Desired E96 Value:
 
R1
R2
Rp
Error (%)

The parallel resistor calculator above only concentrates on the E96 sequence. Many other values of resistors are possible by paralleling. The following table shows the many possibilities, with more interesting ones highlighted:

  100 110 120 130 150 160 180 200 220 240 270 300 330 360 390 430 470 560 620 680 750 820 910
100 50 52.38095 54.54545 56.52174 60 61.53846 64.28571 66.66667 68.75 70.58824 72.97297 75 76.74419 78.26087 79.59184 81.13208 82.45614 84.84848 86.11111 87.17949 88.23529 89.13043 90.09901
110 52.38095 55 57.3913 59.58333 63.46154 65.18519 68.27586 70.96774 73.33333 75.42857 78.15789 80.4878 82.5 84.25532 85.8 87.59259 89.13793 91.9403 93.42466 94.68354 95.93023 96.98925 98.13725
120 54.54545 57.3913 60 62.4 66.66667 68.57143 72 75 77.64706 80 83.07692 85.71429 88 90 91.76471 93.81818 95.59322 98.82353 100.5405 102 103.4483 104.6809 106.0194
130 56.52174 59.58333 62.4 65 69.64286 71.72414 75.48387 78.78788 81.71429 84.32432 87.75 90.69767 93.26087 95.5102 97.5 99.82143 101.8333 105.5072 107.4667 109.1358 110.7955 112.2105 113.75
150 60 63.46154 66.66667 69.64286 75 77.41935 81.81818 85.71429 89.18919 92.30769 96.42857 100 103.125 105.8824 108.3333 111.2069 113.7097 118.3099 120.7792 122.8916 125 126.8041 128.7736
160 61.53846 65.18519 68.57143 71.72414 77.41935 80 84.70588 88.88889 92.63158 96 100.4651 104.3478 107.7551 110.7692 113.4545 116.6102 119.3651 124.4444 127.1795 129.5238 131.8681 133.8776 136.0748
180 64.28571 68.27586 72 75.48387 81.81818 84.70588 90 94.73684 99 102.8571 108 112.5 116.4706 120 123.1579 126.8852 130.1538 136.2162 139.5 142.3256 145.1613 147.6 150.2752
200 66.66667 70.96774 75 78.78788 85.71429 88.88889 94.73684 100 104.7619 109.0909 114.8936 120 124.5283 128.5714 132.2034 136.5079 140.2985 147.3684 151.2195 154.5455 157.8947 160.7843 163.964
220 68.75 73.33333 77.64706 81.71429 89.18919 92.63158 99 104.7619 110 114.7826 121.2245 126.9231 132 136.5517 140.6557 145.5385 149.8551 157.9487 162.381 166.2222 170.1031 173.4615 177.1681
240 70.58824 75.42857 80 84.32432 92.30769 96 102.8571 109.0909 114.7826 120 127.0588 133.3333 138.9474 144 148.5714 154.0299 158.8732 168 173.0233 177.3913 181.8182 185.6604 189.913
270 72.97297 78.15789 83.07692 87.75 96.42857 100.4651 108 114.8936 121.2245 127.0588 135 142.1053 148.5 154.2857 159.5455 165.8571 171.4865 182.1687 188.0899 193.2632 198.5294 203.1193 208.2203
300 75 80.4878 85.71429 90.69767 100 104.3478 112.5 120 126.9231 133.3333 142.1053 150 157.1429 163.6364 169.5652 176.7123 183.1169 195.3488 202.1739 208.1633 214.2857 219.6429 225.6198
330 76.74419 82.5 88 93.26087 103.125 107.7551 116.4706 124.5283 132 138.9474 148.5 157.1429 165 172.1739 178.75 186.7105 193.875 207.6404 215.3684 222.1782 229.1667 235.3043 242.1774
360 78.26087 84.25532 90 95.5102 105.8824 110.7692 120 128.5714 136.5517 144 154.2857 163.6364 172.1739 180 187.2 195.9494 203.8554 219.1304 227.7551 235.3846 243.2432 250.1695 257.9528
390 79.59184 85.8 91.76471 97.5 108.3333 113.4545 123.1579 132.2034 140.6557 148.5714 159.5455 169.5652 178.75 187.2 195 204.5122 213.1395 229.8947 239.4059 247.8505 256.5789 264.2975 273
430 81.13208 87.59259 93.81818 99.82143 111.2069 116.6102 126.8852 136.5079 145.5385 154.0299 165.8571 176.7123 186.7105 195.9494 204.5122 215 224.5556 243.2323 253.9048 263.4234 273.3051 282.08 292.0149
470 82.45614 89.13793 95.59322 101.8333 113.7097 119.3651 130.1538 140.2985 149.8551 158.8732 171.4865 183.1169 193.875 203.8554 213.1395 224.5556 235 255.534 267.3394 277.913 288.9344 298.7597 309.9275
510 83.60656 90.48387 97.14286 103.5938 115.9091 121.791 133.0435 143.662 153.6986 163.2 176.5385 188.8889 200.3571 211.0345 221 233.2979 244.5918 266.9159 279.823 291.4286 303.5714 314.4361 326.831
560 84.84848 91.9403 98.82353 105.5072 118.3099 124.4444 136.2162 147.3684 157.9487 168 182.1687 195.3488 207.6404 219.1304 229.8947 243.2323 255.534 280 294.2373 307.0968 320.6107 332.7536 346.6667
620 86.11111 93.42466 100.5405 107.4667 120.7792 127.1795 139.5 151.2195 162.381 173.0233 188.0899 202.1739 215.3684 227.7551 239.4059 253.9048 267.3394 294.2373 310 324.3077 339.4161 353.0556 368.7582
680 87.17949 94.68354 102 109.1358 122.8916 129.5238 142.3256 154.5455 166.2222 177.3913 193.2632 208.1633 222.1782 235.3846 247.8505 263.4234 277.913 307.0968 324.3077 340 356.6434 371.7333 389.1824
750 88.23529 95.93023 103.4483 110.7955 125 131.8681 145.1613 157.8947 170.1031 181.8182 198.5294 214.2857 229.1667 243.2432 256.5789 273.3051 288.9344 320.6107 339.4161 356.6434 375 391.7197 411.1446
820 89.13043 96.98925 104.6809 112.2105 126.8041 133.8776 147.6 160.7843 173.4615 185.6604 203.1193 219.6429 235.3043 250.1695 264.2975 282.08 298.7597 332.7536 353.0556 371.7333 391.7197 410 431.3295
910 90.09901 98.13725 106.0194 113.75 128.7736 136.0748 150.2752 163.964 177.1681 189.913 208.2203 225.6198 242.1774 257.9528 273 292.0149 309.9275 346.6667 368.7582 389.1824 411.1446 431.3295 455
1000 90.90909 99.0991 107.1429 115.0442 130.4348 137.931 152.5424 166.6667 180.3279 193.5484 212.5984 230.7692 248.1203 264.7059 280.5755 300.6993 319.7279 358.9744 382.716 404.7619 428.5714 450.5495 476.4398
1100 91.66667 100 108.1967 116.2602 132 139.6825 154.6875 169.2308 183.3333 197.0149 216.7883 235.7143 253.8462 271.2329 287.9195 309.1503 329.2994 371.0843 396.5116 420.2247 445.9459 469.7917 498.01
1200 92.30769 100.7634 109.0909 117.2932 133.3333 141.1765 156.5217 171.4286 185.9155 200 220.4082 240 258.8235 276.9231 294.3396 316.5644 337.7246 381.8182 408.7912 434.0426 461.5385 487.1287 517.5355
1300 92.85714 101.4184 109.8592 118.1818 134.4828 142.4658 158.1081 173.3333 188.1579 202.5974 223.5669 243.75 263.1902 281.9277 300 323.1214 345.1977 391.3978 419.7917 446.4646 475.6098 502.8302 535.2941
1500 93.75 102.4845 111.1111 119.6319 136.3636 144.5783 160.7143 176.4706 191.8605 206.8966 228.8136 250 270.4918 290.3226 309.5238 334.1969 357.868 407.767 438.6792 467.8899 500 530.1724 566.39
1600 94.11765 102.924 111.6279 120.2312 137.1429 145.4545 161.7978 177.7778 193.4066 208.6957 231.016 252.6316 273.5751 293.8776 313.5678 338.9163 363.285 414.8148 446.8468 477.193 510.6383 542.1488 580.0797
1800 94.73684 103.6649 112.5 121.2435 138.4615 146.9388 163.6364 180 196.0396 211.7647 234.7826 257.1429 278.8732 300 320.5479 347.0852 372.6872 427.1186 461.157 493.5484 529.4118 563.3588 604.428
2000 95.2381 104.2654 113.2075 122.0657 139.5349 148.1481 165.1376 181.8182 198.1982 214.2857 237.8855 260.8696 283.2618 305.0847 326.3598 353.9095 380.5668 437.5 473.2824 507.4627 545.4545 581.5603 625.4296
2200 95.65217 104.7619 113.7931 122.7468 140.4255 149.1525 166.3866 183.3333 200 216.3934 240.4858 264 286.9565 309.375 331.2741 359.6958 387.2659 446.3768 483.6879 519.4444 559.322 597.351 643.7299
2400 96 105.1793 114.2857 123.3202 141.1765 150 167.4419 184.6154 201.5267 218.1818 242.6966 266.6667 290.1099 313.0435 335.4839 364.6643 393.0314 454.0541 492.7152 529.8701 571.4286 611.1801 659.8187
2700 96.42857 105.694 114.8936 124.0283 142.1053 151.049 168.75 186.2069 203.4247 220.4082 245.4545 270 294.0594 317.6471 340.7767 370.9265 400.3155 463.8037 504.2169 543.1953 586.9565 628.9773 680.6094
3000 96.77419 106.1093 115.3846 124.6006 142.8571 151.8987 169.8113 187.5 204.9689 222.2222 247.7064 272.7273 297.2973 321.4286 345.1327 376.0933 406.3401 471.9101 513.8122 554.3478 600 643.9791 698.2097
3300 97.05882 106.4516 115.7895 125.0729 143.4783 152.6012 170.6897 188.5714 206.25 223.7288 249.5798 275 300 324.5902 348.7805 380.429 411.4058 478.7565 521.9388 563.8191 611.1111 656.7961 713.3017
3600 97.2973 106.7385 116.129 125.4692 144 153.1915 171.4286 189.4737 207.3298 225 251.1628 276.9231 302.2901 327.2727 351.8797 384.1191 415.7248 484.6154 528.91 571.9626 620.6897 667.8733 726.3858
3900 97.5 106.9825 116.4179 125.8065 144.4444 153.6946 172.0588 190.2439 208.2524 226.087 252.518 278.5714 304.2553 329.5775 354.5455 387.2979 419.4508 489.6861 534.9558 579.0393 629.0323 677.5424 737.8378
4300 97.72727 107.2562 116.7421 126.1851 144.9438 154.2601 172.7679 191.1111 209.292 227.3128 254.0481 280.4348 306.4795 332.1888 357.5693 390.9091 423.6897 495.4733 541.8699 587.1486 638.6139 688.6719 751.0557
4700 97.91667 107.4844 117.0124 126.501 145.3608 154.7325 173.3607 191.8367 210.1626 228.3401 255.332 282 308.3499 334.3874 360.1179 393.9571 427.2727 500.3802 547.7444 594.052 646.789 698.1884 762.3886
5100 98.07692 107.6775 117.2414 126.7686 145.7143 155.1331 173.8636 192.4528 210.9023 229.2135 256.4246 283.3333 309.9448 336.2637 362.2951 396.5642 430.3411 504.5936 552.7972 600 653.8462 706.4189 772.213
5600 98.24561 107.8809 117.4825 127.0506 146.087 155.5556 174.3945 193.1034 211.6838 230.137 257.5809 284.7458 311.6358 338.255 364.6077 399.3367 433.6079 509.0909 558.1994 606.3694 661.4173 715.2648 782.7957
6200 98.4127 108.0824 117.7215 127.3302 146.4567 155.9748 174.9216 193.75 212.4611 231.0559 258.7326 286.1538 313.3231 340.2439 366.9196 402.1116 436.8816 513.6095 563.6364 612.7907 669.0647 724.2165 793.5302
6800 98.55072 108.2489 117.9191 127.5613 146.7626 156.3218 175.3582 194.2857 213.1054 231.8182 259.6888 287.3239 314.7265 341.8994 368.8456 404.426 439.6149 517.3913 568.1941 618.1818 675.4967 731.7585 802.594
7500 98.68421 108.41 118.1102 127.7851 147.0588 156.658 175.7813 194.8052 213.7306 232.5581 260.6178 288.4615 316.092 343.5115 370.7224 406.6835 442.2836 521.0918 572.6601 623.4719 681.8182 739.1827 811.5339
8200 98.79518 108.5439 118.2692 127.9712 147.3054 156.9378 176.1337 195.2381 214.2518 233.1754 261.3932 289.4118 317.2333 344.8598 372.2934 408.5747 444.5213 524.2009 576.4172 627.9279 687.1508 745.4545 819.0999
9100 98.91304 108.6862 118.4382 128.169 147.5676 157.2354 176.5086 195.6989 214.8069 233.833 262.2199 290.4255 318.4517 346.3002 373.9726 410.5981 446.9175 527.5362 580.4527 632.7198 692.8934 752.2177 827.2727
10000 99.0099 108.8032 118.5771 128.3317 147.7833 157.4803 176.8173 196.0784 215.2642 234.375 262.9017 291.2621 319.4579 347.4903 375.3609 412.2723 448.9016 530.303 583.8041 636.7041 697.6744 757.8558 834.0972
11000 99.0991 108.9109 118.705 128.4816 147.9821 157.7061 177.102 196.4286 215.6863 234.8754 263.5315 292.0354 320.3883 348.5915 376.6462 413.8233 450.7411 532.872 586.9191 640.411 702.1277 763.1134 840.4702
12000 99.17355 109.0008 118.8119 128.6068 148.1481 157.8947 177.3399 196.7213 216.0393 235.2941 264.0587 292.6829 321.1679 349.5146 377.724 415.1247 452.2855 535.0318 589.5404 643.5331 705.8824 767.5507 845.8559
13000 99.23664 109.077 118.9024 128.7129 148.289 158.0547 177.5417 196.9697 216.3389 235.6495 264.5064 293.2331 321.8305 350.2994 378.6408 416.2323 453.6006 536.8732 591.7768 646.1988 709.0909 771.3459 850.4673
15000 99.33775 109.1992 119.0476 128.883 148.5149 158.3113 177.8656 197.3684 216.82 236.2205 265.2259 294.1176 322.8963 351.5625 380.117 418.0169 455.7207 539.8458 595.3905 650.5102 714.2857 777.4968 857.951
16000 99.37888 109.2489 119.1067 128.9523 148.6068 158.4158 177.9975 197.5309 217.016 236.4532 265.5194 294.4785 323.3313 352.0782 380.72 418.7462 456.5877 541.0628 596.8712 652.2782 716.4179 780.0238 861.029
18000 99.44751 109.3319 119.2053 129.0678 148.7603 158.5903 178.2178 197.8022 217.3436 236.8421 266.0099 295.082 324.0589 352.9412 381.7292 419.9674 458.0401 543.1034 599.3555 655.2463 720 784.2721 866.2084
20000 99.50249 109.3983 119.2843 129.1605 148.8834 158.7302 178.3944 198.0198 217.6063 237.1542 266.4036 295.5665 324.6434 353.6346 382.5405 420.9496 459.2086 544.7471 601.3579 657.6402 722.8916 787.7041 870.3969
22000 99.54751 109.4527 119.349 129.2363 148.9842 158.8448 178.5392 198.1982 217.8218 237.4101 266.7265 295.9641 325.1232 354.2039 383.2068 421.7566 460.1691 546.0993 603.0062 659.612 725.2747 790.5346 873.8542
24000 99.58506 109.4981 119.403 129.2996 149.0683 158.9404 178.66 198.3471 218.0017 237.6238 266.9963 296.2963 325.524 354.6798 383.7638 422.4314 460.9726 547.2313 604.3867 661.2642 727.2727 792.9089 876.7563
27000 99.631 109.5537 119.469 129.3771 149.1713 159.0574 178.8079 198.5294 218.2219 237.8855 267.3267 296.7033 326.0154 355.2632 384.4469 423.2592 461.9585 548.6212 606.0825 663.2948 729.7297 795.8303 880.3296
30000 99.66777 109.5981 119.5219 129.4391 149.2537 159.1512 178.9264 198.6755 218.3984 238.0952 267.5917 297.0297 326.4095 355.7312 384.9951 423.9238 462.7502 549.7382 607.4461 664.9283 731.7073 798.183 883.2093
33000 99.69789 109.6346 119.5652 129.4899 149.3213 159.228 179.0235 198.7952 218.543 238.2671 267.8088 297.2973 326.7327 356.1151 385.4447 424.469 463.4001 550.6555 608.5663 666.2708 733.3333 800.1183 885.5795
36000 99.72299 109.6649 119.6013 129.5322 149.3776 159.292 179.1045 198.895 218.6637 238.4106 267.9901 297.5207 327.0025 356.4356 385.8203 424.9245 463.943 551.4223 609.503 667.3937 734.6939 801.7382 887.5643
39000 99.74425 109.6906 119.6319 129.5681 149.4253 159.3463 179.173 198.9796 218.7659 238.5321 268.1436 297.7099 327.2311 356.7073 386.1386 425.3107 464.4033 552.0728 610.2978 668.3468 735.8491 803.114 889.2508
43000 99.76798 109.7193 119.666 129.6082 149.4786 159.4069 179.2497 199.0741 218.8801 238.6679 268.3152 297.9215 327.4867 357.0111 386.4946 425.7426 464.9183 552.8007 611.1875 669.4139 737.1429 804.6554 891.141
47000 99.78769 109.7432 119.6944 129.6414 149.5228 159.4572 179.3133 199.1525 218.975 238.7807 268.4578 298.0973 327.6991 357.2635 386.7905 426.1016 465.3465 553.4062 611.9278 670.302 738.2199 805.9389 892.7155
51000 99.80431 109.7633 119.7183 129.6695 149.5601 159.4996 179.3669 199.2188 219.0551 238.8759 268.5781 298.2456 327.8784 357.4766 387.0403 426.4048 465.7082 553.9178 612.5533 671.0526 739.1304 807.0243 894.0474
56000 99.82175 109.7844 119.7434 129.6989 149.5993 159.5442 179.4233 199.2883 219.1391 238.9758 268.7045 298.4014 328.0667 357.7005 387.3027 426.7234 466.0882 554.4554 613.2109 671.8419 740.0881 808.1661 895.449
62000 99.83897 109.8052 119.7682 129.728 149.638 159.5882 179.4789 199.3569 219.2221 239.0746 268.8293 298.5554 328.2528 357.9217 387.5621 427.0383 466.4639 554.9872 613.8614 672.6228 741.0359 809.2964 896.8368
68000 99.85316 109.8223 119.7886 129.7519 149.6698 159.6244 179.5248 199.4135 219.2905 239.1559 268.9322 298.6823 328.4063 358.1042 387.776 427.298 466.7738 555.4259 614.3981 673.2673 741.8182 810.2296 897.9829
75000 99.86684 109.8389 119.8083 129.7751 149.7006 159.6594 179.569 199.4681 219.3566 239.2344 269.0315 298.8048 328.5544 358.2803 387.9825 427.5487 467.073 555.8497 614.9167 673.8901 742.5743 811.1316 899.091
82000 99.8782 109.8526 119.8246 129.7942 149.7261 159.6884 179.6057 199.5134 219.4113 239.2996 269.1139 298.9064 328.6773 358.4264 388.1539 427.7569 467.3215 556.2016 615.3474 674.4074 743.2024 811.8812 900.0121
91000 99.89023 109.8672 119.842 129.8146 149.7532 159.7192 179.6447 199.5614 219.4694 239.3687 269.2013 299.0142 328.8076 358.5814 388.3357 427.9777 467.585 556.5749 615.8044 674.9564 743.8692 812.677 900.9901