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Decimal Equivalents Chart English - Metric

Below is a list of decimal-fraction equivalents, often called simply decimal equivalents. This list covers the fractions most frequently used in machining: 0 to 1 by 64ths. The numbers themselves are unitless, but they are often used in reference to inches. The numbers are exact, although measurements made in 64ths usually do not have this degree of precision (i.e., this number of significant digits), and dimensions specified in 64ths are usually not toleranced to this degree of precision. The numbers after the thousandths or ten-thousandths decimal place are usually truncated or rounded for practical purposes.

English Metric Decimal English Metric Decimal English Metric Decimal English Metric Decimal                         .. .1 .0039 45 .. .0820 5 .. .2055 7/16 .. .4375   .2 .0079 44 .. .0860 4 .. .2090 29/64 .. .4531 .. .3 .0118 43 .. .0890 3 .. .2130 15/32 .. .4687 80 .. .0135 42 .. .0935 7/32 . .2187 .. 12. .4724 79 . .0145 3/32 .. .0937 2 .. .2210 31/64 .. .4844 1/64 .. .0156 41 .. .0960 1 .. .2280 1/2 .. .5000 .. .4 .0157 40 .. .0980 A .. .2340 .. 13. .5118 78 . .0160 39 .. .0995 15/64 .. .2344 33/64 .. .5156 77 . .0180 38 .. .1015 .. 6. .2362 17/32 .. .5312 . .5 .0197 37 .. .1040 B .. .2380 35/64 . .5469 76 . .0200 36 .. .1065 C .. .2420 .. 14. .5512 75 . .0210 7/64 .. .1094 D .. .2460 9/16 .. .5625 74   .0225 35 .. .1100 1/4 .. .2500 37/64 .. .5781 . .6 .0236 34 .. .1110 F .. .2570 .. 15. .5906 73 .. .0240 33 .. .1130 G .. .2610 19/32 .. .5937 72 .. .0250 32 .. .1160 17/64 .. .2656 39/64 .. .6094 71 .. .0260 .. 3. .1181 H .. .2660 5/8 .. .6250 .. .7 .0276 31 .. .1200 I .. .2720 .. 16. .6299 70 .. .0280 1/8 .. .1250 .. 7. .2756 41/64 .. .6406 69 .. .0292 30 .. .1285 J .. .2770 21/32 .. .6562 68 .. .0310 29 .. .1360 K .. .2810 .. 17. .6693 1/32 .. .0312 28 .. .1405 9/32 .. .2812 43/64 .. .6719 .. .8 .0315 9/64 .. .1406 L .. .2900 11/16 .. .6875 67 .. .0320 27 .. .1440 M .. .2950 45/64 .. .7031 66 .. .0330 26 . .1470 19/64 .. .2969 .. 18. .7087 65 .. .0350 25 .. .1495 N .. .3020 23/32 .. .7187 . .9 .0354 24 .. .1520 5/16 .. .3125 47/64 .. .7344 64 .. .0360 23 .. .1540 .. 8. .3150 .. 19. .7480 63 .. .0370 5/32 . .1562 O .. .3160 3/4 .. .7500 62 .. .0380 22 .. .1570 P .. .3230 49/64 .. .7656 61 .. .0390 .. 4. .1575 21/64 .. .3281 25/32 .. .7812 .. 1. .0394 21 .. .1590 Q .. .3320 .. 20. .7874 60 .. .0400 20 .. .1610 R .. .3390 51/64 .. .7969 59 .. .0410 19 .. .1660 11/32 .. .3437 13/16 .. .8125 58 .. .0420 18 . .1695 S .. .3480 .. 21. .8268 57 . .0430 11/64 .. .1719 .. 9. .3543 53/64 .. .8281 56 .. .0465 17 .. .1730 T .. .3580 27/32 .. .8437 3/64 .. .0469 16 .. .1770 23/64 .. .3594 55/64 .. .8594 55 .. .0520 15 .. .1800 U .. .3680 .. 22. .8661 54 .. .0550 14 .. .1820 3/8 .. .3750 7/8 .. .8750 53 .. .0595 13 .. .1850 V ‛& .3770 57/64 .. .8906 1/16 . .0625 3/16 .. .1875 W .. .3860 .. 23. .9055 52 .. .0635 12 .. .1890 25/64 .. .3906 29/32 .. .9062 51 .. .0670 11 .. .1910 .. 10. .3937 59/64 .. .9219 50 .. .0700 10 .. .1935 X .. .3970 15/16 .. .9375 49 . .0730 9 .. .1960 Y . .4040 .. 24. .9449 48 .. .0760 .. 5. .1968 13/32 .. .4062 61/64 .. .9531 5/64 .. .0781 8 .. .1990 Z .. .4130 31/32 .. .9687 47 .. .0785 7 .. .2010 27/64 .. .4219 .. 25. .9842 .. 2. .0787 13/64 .. .2031 .. 11. .4331 63/64 .. .9844 46 .. .0810 6 .. .2040       1 25.4 1.000

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