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REF: Tools & Fasteners
Decimal Equivalent Chart
Fraction, wire gauge, letter and metric sizes.
| Sizes | Decimal Inches | Sizes | Decimal Inches | Sizes | Decimal Inches | Sizes | Decimal Inches | Sizes | Decimal Inches | Sizes | Decimal Inches |
| 97 | .0059 | 59 | .0410 | 2.75mm | .1083 | 5mm | .1969 | N | .3020 | 13mm | .5118 |
| 96 | .0063 | 1.05mm | .0413 | 7/64 | .1094 | 8 | .1990 | 7.7mm | .3031 | 33/64 | .5156 |
| 95 | .0067 | 58 | .0420 | 35 | .1100 | 5.1mm | .2008 | 7.75mm | .3051 | 17/32 | .5312 |
| 94 | .0071 | 57 | .0430 | 2.8mm | .1102 | 7 | .2010 | 7.8mm | .3071 | 13.5mm | .5315 |
| 93 | .0075 | 1.1mm | .0433 | 34 | .1110 | 13/64 | .2031 | 7.9mm | .3110 | 35/64 | .5469 |
| 92 | .0079 | 1.15mm | .0453 | 33 | .1130 | 6 | .2040 | 5/16 | .3125 | 14mm | .5512 |
| .2mm | .0079 | 56 | .0465 | 2.9mm | .1142 | 5.2mm | .2047 | 8mm | .3150 | 9/16 | .5625 |
| 91 | .0083 | 3/64 | .0469 | 32 | .1160 | 5 | .2055 | O | .3160 | 14.5mm | .5709 |
| 90 | .0087 | 1.2mm | .0472 | 3mm | .1181 | 5.25mm | .2067 | 8.1mm | .3189 | 37/64 | .5781 |
| 22mm | .0087 | 1.25mm | .0492 | 31 | .1200 | 5.3mm | .2087 | 8.2mm | .3228 | 15mm | .5906 |
| 89 | .0091 | 1.3mm | .0512 | 3.1mm | .1220 | 4 | .2090 | P | .3230 | 19/32 | .5938 |
| 88 | .0095 | 55 | .0520 | 1/8 | .1250 | 5.4mm | .2126 | 8.25mm | .3248 | 39/64 | .6094 |
| .25mm | .0098 | 1.35mm | .0531 | 3.2mm | .1260 | 3 | .2130 | 8.3mm | .3268 | 15.5mm | .6102 |
| 87 | .0100 | 54 | .0550 | 3.25mm | .1280 | 5.5mm | .2165 | 21/64 | .3281 | 5/8 | .6250 |
| 86 | .0105 | 1.4mm | .0551 | 30 | .1285 | 7/32 | .2188 | 8.4mm | .3307 | 16mm | .6299 |
| 85 | .0110 | 1.45mm | .0571 | 3.3mm | .1299 | 5.6mm | .2205 | Q | .3320 | 41/64 | .6406 |
| .28mm | .0110 | 1.5mm | .0591 | 3.4mm | .1339 | 2 | .2210 | 8.5mm | .3346 | 16.5mm | .6496 |
| 84 | .0115 | 53 | .0595 | 29 | .1360 | 5.7mm | .2244 | 8.6mm | .3386 | 21/32 | .6562 |
| .3mm | .0118 | 1.55mm | .0610 | 3.5mm | .1378 | 5.75mm | .2264 | R | .3390 | 17mm | .6693 |
| 83 | .0120 | 1/16 | .0625 | 28 | .1405 | 1 | .2280 | 8.7mm | .3425 | 43/64 | .6719 |
| 82 | .0125 | 1.6mm | .0630 | 9/64 | .1406 | 5.8mm | .2283 | 11/32 | .3438 | 11/16 | .6875 |
| .32mm | .0126 | 52 | .0635 | 3.6mm | .1417 | 5.9mm | .2323 | 8.75mm | .3445 | 17.5mm | .6890 |
| 81 | .0130 | 1.65mm | .0650 | 27 | .1440 | A | .2340 | 8.8mm | .3465 | 45/64 | .7031 |
| 80 | .0135 | 1.7mm | .0669 | 3.7mm | .1457 | 15/64 | .2344 | S | .3480 | 18mm | .7087 |
| .35mm | .0138 | 51 | .0670 | 26 | .1470 | 6mm | .2362 | 8.9mm | .3504 | 23/32 | .7188 |
| 79 | .0145 | 1.75mm | .0689 | 3.75mm | .1476 | B | .2380 | 9mm | .3543 | 18.5mm | .7283 |
| 1/64 | .0156 | 50 | .0700 | 25 | .1495 | 6.1mm | .2402 | T | .3580 | 47/64 | .7344 |
| .4mm | .0157 | 1.8mm | .0709 | 3.8mm | .1496 | C | .2420 | 9.1mm | .3583 | 19mm | .7480 |
| 78 | .0160 | 1.85mm | .0728 | 24 | .1520 | 6.2mm | .2441 | 23/64 | .3594 | 3/4 | .7500 |
| .45mm | .0177 | 49 | .0730 | 3.9mm | .1535 | D | .2460 | 9.2mm | .3622 | 49/64 | .7656 |
| 77 | .0180 | 1.9mm | .0748 | 23 | .1540 | 6.25mm | .2461 | 9.25mm | .3642 | 19.5mm | .7677 |
| .5mm | .0197 | 48 | .0760 | 5/32 | .1562 | 6.3mm | .2480 | 9.3mm | .3661 | 25/32 | .7812 |
| 76 | .0200 | 1.95mm | .0768 | 22 | .1570 | E | .2500 | U | .3680 | 20mm | .7874 |
| 75 | .0210 | 5/64 | .0781 | 4mm | .1575 | 1/4 | .2500 | 9.4mm | .3701 | 51/64 | .7969 |
| .55mm | .0217 | 47 | .0785 | 21 | .1590 | 6.4mm | .2520 | 9.5mm | .3740 | 20.5mm | .8071 |
| 74 | .0225 | 2mm | .0787 | 20 | .1610 | 6.5mm | .2559 | 3/8 | .3750 | 13/16 | .8125 |
| .6mm | .0236 | 2.05mm | .0807 | 4.1mm | .1614 | F | .2570 | V | .3770 | 21mm | .8268 |
| 73 | .0240 | 46 | .0810 | 4.2mm | .1654 | 6.6mm | .2598 | 9.6mm | .3780 | 53/64 | .8281 |
| 72 | .0250 | 45 | .0820 | 19 | .1660 | G | .2610 | 9.7mm | .3819 | 27/32 | .8438 |
| .65mm | .0256 | 2.1mm | .0827 | 4.25mm | .1673 | 6.7mm | .2638 | 9.75mm | .3839 | 21.5mm | .8465 |
| 71 | .0260 | 2.15mm | .0846 | 4.3mm | .1693 | 17/64 | .2656 | 9.8mm | .3858 | 55/64 | .8594 |
| .7mm | .0276 | 44 | .0860 | 18 | .1695 | 6.75mm | .2657 | W | .3860 | 22mm | .8661 |
| 70 | .0280 | 2.2mm | .0866 | 11/64 | .1719 | H | .2660 | 9.9mm | .3898 | 7/8 | .8750 |
| 69 | .0292 | 2.25mm | .0886 | 17 | .1730 | 6.8mm | .2677 | 25/64 | .3906 | 22.5mm | .8858 |
| .75mm | .0295 | 43 | .0890 | 4.4mm | .1732 | 6.9mm | .2717 | 10mm | .3937 | 57/64 | .8906 |
| 68 | .0310 | 2.3mm | .0906 | 16 | .1770 | I | .2720 | X | .3970 | 23mm | .9055 |
| 1/32 | .0312 | 2.35mm | .0925 | 4.5mm | .1772 | 7mm | .2756 | Y | .4040 | 29/32 | .9062 |
| .8mm | .0315 | 42 | .0935 | 15 | .1800 | J | .2770 | 13/32 | .4062 | 59/64 | .9219 |
| 67 | .0320 | 3/32 | .0938 | 4.6mm | .1811 | 7.1mm | .2795 | Z | .4130 | 23.5mm | .9252 |
| 66 | .0330 | 2.4mm | .0945 | 14 | .1820 | K | .2810 | 10.5mm | .4134 | 15/16 | .9375 |
| .85mm | .0335 | 41 | .0960 | 13 | .1850 | 9/32 | .2812 | 27/64 | .4219 | 24mm | .9449 |
| 65 | .0350 | 2.45mm | .0965 | 4.7mm | .1850 | 7.2mm | .2835 | 11mm | .4331 | 61/64 | .9531 |
| .9mm | .0354 | 40 | .0980 | 4.75mm | .1870 | 7.25mm | .2854 | 7/16 | .4375 | 24.5mm | .9646 |
| 64 | .0360 | 2.5mm | .0984 | 3/16 | .1875 | 7.3mm | .2874 | 11.5mm | .4528 | 31/32 | .9688 |
| 63 | .0370 | 39 | .0995 | 4.8mm | .1890 | L | .2900 | 29/64 | .4531 | 25mm | .9843 |
| .95mm | .0374 | 38 | .1015 | 12 | .1890 | 7.4mm | .2913 | 15/32 | .4688 | 63/64 | .9844 |
| 62 | .0380 | 2.6mm | .1024 | 11 | .1910 | M | .2950 | 12mm | .4724 | 1 | 1.0000 |
| 61 | .0390 | 37 | .1040 | 4.9mm | .1929 | 7.5mm | .2953 | 31/64 | .4844 | ||
| 1mm | .0394 | 2.7mm | .1063 | 10 | .1935 | 19/64 | .2969 | 12.5mm | .4921 | ||
| 60 | .0400 | 36 | .1065 | 9 | .1960 | 7.6mm | .2992 | 1/2 | .5000 |
