TCVN381:1970

Tiêu chuẩn Việt Nam TCVN 381:1970 về Bảng tính chuyển Insơ - Milimet - Từ 0,001 insơ đến 1 insơ TIÊU CHUẨN NHÀ NƯỚC TCVN 381 - 70 BẢNG TÍNH CHUYỂN INSƠ - MILIMÉT TỪ 0,001 INSƠ ĐẾN 1 INSƠ Tiêu chuẩn này áp dụng cho việc tính toán các kích thước độ dài khi cần tính chuyển các trị số từ đơn vị insơ sang đơn vị milimét trong phạm vi từ 0,001” đến 1” theo đẳng thức: 1” = 25,400 000 mm Các trị số nêu trong bảng tính chuyển của tiêu chuẩn này được tính ở nhiệt độ 20 o C. Chú thích: Trong trường hợp cần tính thật chính xác thì không dùng bảng này mà tính theo tỷ lệ sau: - Đối với hệ insơ Anh: 1” Anh = 25,399 956 mm - Đối với hệ insơ Mỹ: 1” Mỹ = 25,400 051 mm Insơ Insơ 0,000 0,001 0,002 0,003 0,004 0,005 0,006 0,007 0,008 0,009 Milimet 0 0 0,0254 0,0508 0,0762 0,1016 0,1270 0,1524 0,1778 0,2032 0,2286 0,01 0,2540 0,2794 0,3048 0,3302 0,3556 0,3810 0,4064 0,4318 0,4572 0,4826 0,02 0,5080 0,5334 0,5588 0,5842 0,6096 0,6350 0,6604 0,6858 0,7112 0,7366 0,03 0,7620 0,7874 0,8128 0,8382 0,8636 0,8890 0,9144 0,9398 0,9652 0,9906 0,04 1,0160 1,0414 1,0668 1,0922 1,1176 1,1430 1,1684 1,1938 1,2192 1,2446 0,05 1,2700 1,2954 1,3208 1,3462 1,3716 1,3970 1,4224 1,4478 1,4732 1,4986 0,06 1,5240 1,5494 1,5748 1,6002 1,6256 1,6510 1,6764 1,7018 1,7272 1,7526 0,07 1,7780 1,8034 1,8288 1,8542 1,8796 1,9050 1,9304 1,9558 1,9812 2,0066 0,08 2,0320 2,0574 2,0828 2,1082 2,1336 2,1590 2,1844 2,2098 2,2352 2,2606 0,09 2,2860 2,3114 2,3368 2,3622 2,3876 2,4130 2,4384 2,4638 2,4892 2,5146 0,10 2,5400 2,5654 2,5908 2,6162 2,6416 2,6670 2,6924 2,7178 2,7432 2,7686 0,11 2,7940 2,8194 2,8448 2,8702 2,8956 2,9210 2,9464 2,9718 2,9972 3,0226 0,12 3,0480 3,0734 3,0988 3,1242 3,1496 3,1750 3,2004 3,2258 3,2512 3,2766 0,13 3,3020 3,3274 3,3528 3,3782 3,4036 3,4290 3,4544 3,4798 3,5052 3,5306 0,14 3,5560 3,5814 3,6068 3,6322 3,6576 3,6830 3,7084 3,7338 3,7592 3,7846 0,15 3,8100 3,8354 3,8608 3,8862 3,9116 3,9370 3,9624 3,9878 4,0132 4,0386 0,16 4,0640 4,0894 4,1148 4,1402 4,1656 4,1910 4,2164 4,2418 4,2672 4,2926 0,17 4,3180 4,3434 4,3688 4,3942 4,4196 4,4450 4,4704 4,4958 4,5212 4,5466 0,18 4,5720 4,5974 4,6228 4,6482 4,6736 4,6990 4,7244 4,7498 4,7752 4,8006 0,19 4,8260 4,8514 4,8768 4,9022 4,9276 4,9530 4,9784 5,0038 5,0292 5,0546 0,20 5,0800 5,1054 5,1308 5,1562 5,1816 5,2070 5,2324 5,2578 5,2832 5,3086 0,21 5,3340 5,3594 5,3848 5,4102 5,4356 5,4610 5,4864 5,5118 5,5372 5,5626 0,22 5,5880 5,6134 5,6388 5,6642 5,6896 5,7150 5,7404 5,7658 5,7912 5,8166 0,23 5,8420 5,8674 5,8928 5,9182 5,9436 5,9690 5,9944 6,0198 6,0452 6,0706 0,24 6,0960 6,1214 6,1468 6,1722 6,1976 6,2230 6,2484 6,2738 6,2992 6,3246 0,25 6,3500 6,3754 6,4008 6,4262 6,4516 6,4770 6,5024 6,5278 6,5532 6,5786 0,26 6,6040 6,6294 6,6548 6,6802 6,7056 6,7310 6,7564 6,7818 6,8072 6,8326 0,27 6,8580 6,8834 6,9088 6,9342 6,9596 6,9850 7,0104 7,0358 7,0612 7,0866 0,28 7,1120 7,1374 7,1628 7,1882 7,2136 7,2390 7,2644 7,2898 7,3152 7,3406 0,29 7,3660 7,3914 7,4168 7,4422 7,4676 7,4930 7,5184 7,5438 7,5692 7,5946 0,30 7,6200 7,6454 7,6708 7,6962 7,7216 7,7470 7,7724 7,7978 7,8232 7,8486 0,31 7,8740 7,8994 7,9248 7,9502 7,9756 8,0010 8,0264 8,0518 8,0772 8,1026 0,32 8,1280 8,1534 8,1788 8,2042 8,2296 8,2550 8,2804 8,3058 8,3312 8,3566 0,33 8,3820 8,4074 8,4328 8,4582 8,4836 8,5090 8,5344 8,5598 8,5852 8,6106 0,34 8,6360 8,6614 8,6868 8,7122 8,7376 8,7630 8,7884 8,8138 8,8392 8,8646 0,35 8,8900 8,9154 8,9408 8,9662 8,9916 9,0170 9,0424 9,0678 9,0932 9,1186 0,36 9,1440 9,1694 9,1948 9,2202 9,2456 9,2710 9,2964 9,3218 9,3472 9,3726 0,37 9,3980 9,4234 9,4488 9,4742 9,4996 9,5250 9,5504 9,5758 9,6012 9,6266 0,38 9,6520 9,6774 9,7028 9,7282 9,7536 9,7790 9,8044 9,8298 9,8552 9,8806 0,39 9,9060 9,9314 9,9568 9,9822 10,0076 10,0330 10,0584 10,0838 10,1092 10,1346 0,40 10,1600 10,1854 10,2108 10,2362 10,2616 10,2870 10,3124 10,3378 10,3632 10,3886 0,41 10,4140 10,4394 10,4648 10,4902 10,5156 10,5410 10,5664 10,5918 10,6172 10,6426 0,42 10,6680 10,6934 10,7188 10,7442 10,7696 10,7950 10,8204 10,8458 10,8712 10,8966 0,43 10,9220 10,9474 10,9728 10,9982 11,0236 11,0490 11,0744 11,0998 11,1252 11,1506 0,44 11,1760 11,2014 11,2268 11,2522 11,2776 11,3030 11,3284 11,3538 11,3792 11,4046 0,45 11,4300 11,4554 11,4808 11,5062 11,5316 11,5570 11,5824 11,6078 11,6332 11,6586 0,46 11,6840 11,7094 11,7348 11,7602 11,7856 11,8110 11,8364 11,8618 11,8872 11,9126 0,47 11,9380 11,9634 11,9888 12,0142 12,0396 12,0650 12,0904 12,1158 12,1412 12,1666 0,48 12,1920 12,2174 12,2428 12,2682 12,2936 12,3190 12,3444 12,3698 12,3952 12,4206 0,49 12,4460 12,4714 12,4968 12,5222 12,5476 12,5730 12,5984 12,6238 12,6492 12,6746 0,50 12,7000 12,7254 12,7508 12,7762 12,8016 12,8270 12,8524 12,8778 12,9032 12,9286 0,51 12,9540 12,9794 13,0048 13,0302 13,0556 13,0810 13,1064 13,1318 13,1572 13,1826 0,52 13,2080 13,2334 13,2588 13,2842 13,3096 13,3350 13,3604 13,3858 13,4112 13,4366 0,53 13,4620 13,4874 13,5128 13,5382 13,5636 13,5890 13,6144 13,6398 13,6652 13,6906 0,54 13,7160 13,7414 13,7668 13,7922 13,8176 13,8430 13,8684 13,8938 13,9192 13,9446 0,55 13,9700 13,9954 14,0208 14,0462 14,0716 14,0970 14,1224 14,1478 14,1732 14,1986 0,56 14,2240 14,2494 14,2748 14,3002 14,3256 14,3510 14,3764 14,4018 14,4272 14,4526 0,57 14,4780 14,5034 14,5288 14,5542 14,5796 14,6050 14,6304 14,6558 14,6812 14,7066 0,58 14,7320 14,7574 14,7828 14,8082 14,8336 14,8590 14,8844 14,9098 14,9352 14,9606 0,59 14,9860 15,0114 15,0368 15,0622 15,0876 15,1130 15,1384 15,1638 15,1892 15,2146 0,60 15,2400 15,2654 15,2908 15,3162 15,3416 15,3670 15,3924 15,4178 15,4432 15,4686 0,61 15,4940 15,5194 15,5448 15,5702 15,5956 15,6210 15,6464 15,6718 15,6972 15,7226 0,62 15,7480 15,7734 15,7988 15,8242 15,8496 15,8750 15,9004 15,9258 15,9512 15,9766 0,63 16,0020 16,0274 16,0528 16,0782 16,1036 16,1290 16,1544 16,1798 16,2052 16,2306 0,64 16,2560 16,2814 16,3068 16,3322 16,3576 16,3830 16,4084 16,4338 16,4592 16,4846 0,65 16,5100 16,5354 16,5608 16,5862 16,6116 16,6370 16,6624 16,6878 16,7132 16,7386 0,66 16,7640 16,7894 16,8148 16,8402 16,8656 16,8910 16,9164 16,9418 16,9672 16,9926 0,67 17,0180 17,0434 17,0688 17,0942 17,1196 17,1450 17,1704 17,1958 17,2212 17,2466 0,68 17,2720 17,2974 17,3228 17,3482 17,3736 17,3990 17,4244 17,4498 17,4752 17,5006 0,69 17,5260 17,5514 17,5768 17,6022 17,6276 17,6530 17,6784 17,7038 17,7292 17,7546 0,70 17,7800 17,8054 17,8308 17,8562 17,8816 17,9070 17,9324 17,9578 17,9832 18,0086 0,71 18,0340 18,0594 18,0848 18,1102 18,1356 18,1610 18,1864 18,2118 18,2372 18,2626 0,72 18,2880 18,3134 18,3388 18,3642 18,3896 18,4150 18,4404 18,4658 18,4912 18,5166 0,73 18,5420 18,5674 18,5928 18,6182 18,6436 18,6690 18,6944 18,7198 18,7452 18,7706 0,74 18,7960 18,8214 18,8468 18,8722 18,8976 18,9230 18,9484 18,9738 18,9992 19,0246 0,75 19,0500 19,0754 19,1008 19,1262 19,1516 19,1770 19,2024 19,2278 19,2532 19,2786 0,76 19,3040 19,3294 19,3548 19,3802 19,4056 19,4310 19,4564 19,4818 19,5072 19,5326 0,77 19,5580 19,5834 19,6088 19,6342 19,6596 19,6850 19,7104 19,7358 19,7612 19,7866 0,78 19,8120 19,8374 19,8628 19,8882 19,9136 19,9390 19,9644 19,9898 20,0152 20,0406 0,79 20,0660 20,0914 20,1168 20,1422 20,1676 20,1930 20,2184 20,2438 20,2692 20,2946 0,80 20,3200 20,3454 20,3708 20,3962 20,4216 20,4470 20,4724 20,4978 20,5232 20,5486 0,81 20,5740 20,5994 20,6248 20,6502 20,6756 20,7010 20,7264 20,7518 20,7772 20,8026 0,82 20,8280 20,8534 20,8788 20,9042 20,9296 20,9550 20,9804 21,0058 21,0312 21,0566 0,83 21,0820 21,1074 21,1328 21,1582 21,1836 21,2090 21,2344 21,2598 21,2852 21,3106 0,84 21,3360 21,3614 21,3868 21,4122 21,4376 21,4630 21,4884 21,5138 21,5392 21,5646 0,85 21,5900 21,6154 21,6408 21,6662 21,6916 21,7170 21,7424 21,7678 21,7932 21,8186 0,86 21,8440 21,8694 21,8948 21,9202 21,9456 21,9710 21,9964 22,0218 22,0472 22,0726 0,87 22,0980 22,1234 22,1488 22,1742 22,1996 22,2250 22,2504 22,2758 22,3012 22,3266 0,88 22,3520 22,3774 22,4028 22,4282 22,4536 22,4790 22,5044 22,5298 22,5552 22,5806 0,89 22,6060 22,6314 22,6568 22,6822 22,7076 22,7330 22,7584 22,7838 22,8092 22,8346 0,90 22,8600 22,8854 22,9108 22,9362 22,9616 22,9870 23,0124 23,0378 23,0632 23,0886 0,91 23,1140 23,1394 23,1648 23,1902 23,2156 23,2410 23,2664 23,2918 23,3172 23,3426 0,92 23,3680 23,3934 23,4188 23,4442 23,4696 23,4950 23,5204 23,5458 23,5712 23,5966 0,93 23,6220 23,6474 23,6728 23,6982 23,7236 23,7490 23,7744 23,7998 23,8252 23,8506 0,94 23,8760 23,9014 23,9268 23,9522 23,9776 24,0030 24,0284 24,0538 24,0792 24,1046 0,95 24,1300 24,1554 24,1808 24,2062 24,2316 24,2570 24,2824 24,3078 24,3332 24,3586 0,96 24,3840 24,4094 24,4348 24,4602 24,4856 24,5110 24,5364 24,5618 24,5872 24,6126 0,97 24,6380 24,6634 24,6888 24,7142 24,7396 24,7650 24,7904 24,8158 24,8412 24,8666 0,98 24,8920 24,9174 24,9428 24,9682 24,9936 25,0190 25,0444 25,0698 25,0952 25,1206 0,99 25,1460 25,1714 25,1968 25,2222 25,2476 25,2730 25,2984 25,3238 25,3492 25,3746 1” = 25,4000 (Tiếp theo) Insơ Milimet Insơ Milimet Insơ Milimet Insơ Milimet 1/64 0,015625 0,3969 17/64 0,109375 2,7781 33/64 0,515625 13,0969 49/64 0,765625 19,4469 1/32 0,03125 0,7938 9/32 0,28125 7,1438 17/32 0,53125 13,4938 25/32 0,78125 19,8438 3/64 0,046875 1,1906 19/64 0,296875 7,5406 35/64 0,546875 13,8906 51/64 0,796875 20,2406 1/16 0,0625 1,5875 5/16 0,3125 7,9375 9/16 0,5625 14,2875 13/16 0,8125 20,6375 5/64 0,078125 1,9844 21/64 0,328125 8,3344 37/64 0,578125 14,6844 53/64 0,828125 21,0344 3/32 0,09375 2,3813 11/32 0,34375 8,7313 19/32 0,59375 15,0813 27/32 0,84375 21,4313 7/64 0,109375 2,7781 26/34 0,359375 9,1281 39/64 0,609375 15,4781 55/64 0,859375 21,8281 1/8 0,125 3,1750 3/8 0,375 9,5250 5/8 0,625 15,8750 7/8 0,875 22,2250 9/64 0,140625 3,5719 25/64 0,390625 9,9219 41/64 0,640625 16,2719 57/64 0,890625 22,6219 5/32 0,15625 3,9688 13/32 0,40625 10,3188 21/32 0,65625 16,6688 29/32 0,90625 23,0188 11/64 0,171875 4,3656 27/64 0,421875 10,7156 43/64 0,671875 17,0656 59/64 0,921875 23,4156 3/16 0,1875 4,7625 7/16 0,4375 11,1125 11/16 0,6875 17,4625 15/16 0,9375 23,8125 13/64 0,203125 5,1594 29/64 0,453125 11,5094 45/64 0,703125 17,8594 61/64 0,953125 24,2094 7/32 0,21875 5,5563 15/32 0,46875 11,9063 23/32 0,71875 18,2563 31/32 0,96875 24,6063 15/64 0,234375 5,9531 31/64 0,484375 12,3031 47/64 0,734375 18,6531 63/64 0,984375 25,0031 1/4 0,25 6,3500 1/2 0,5 12,7000 3/4 0,75 19,0500 1” 25,4000