1:1 screen gauge · beta · coarse identification only
Narrow the candidates.
Browser pixels are not physical units. Calibrate twice on this display, compare only the
cylindrical shank, and expect a candidate group whenever the estimated error is larger than
the gap between adjacent sizes.
Calibration · ISO/IEC 7810 ID-1 short edge 53.98 MM · TWO PASSES
Match one card edge.
Hold the 53.98 mm short edge of a standard bank/ID card against the blue line. Adjust until
the endpoints match, then record two independent passes.
Displayed edge length 100.0% browser reference scale
Record pass 1 Record pass 2 Reset
Not calibrated on this display.
53.98 MM SHORT EDGE
Use the rigid edge—not a rounded corner. Do not disable browser zoom for this tool.
Actual-size candidate gauge CALIBRATION REQUIRED
Nominal drill size 0.0135 in · 0.343 mm 0.0145 in · 0.368 mm 1/64 in · 0.397 mm 0.0160 in · 0.406 mm 0.0180 in · 0.457 mm 0.0197 in · 0.5 mm 0.0200 in · 0.508 mm 0.0210 in · 0.533 mm 0.0225 in · 0.571 mm 0.0236 in · 0.6 mm 0.0240 in · 0.610 mm 0.0250 in · 0.635 mm 0.0260 in · 0.660 mm 0.0276 in · 0.7 mm 0.0280 in · 0.711 mm 0.0292 in · 0.742 mm 0.0310 in · 0.787 mm 1/32 in · 0.794 mm 0.0315 in · 0.8 mm 0.0320 in · 0.813 mm 0.0330 in · 0.838 mm 0.0350 in · 0.889 mm 0.0354 in · 0.9 mm 0.0360 in · 0.914 mm 0.0370 in · 0.940 mm 0.0380 in · 0.965 mm 0.0390 in · 0.991 mm 0.0394 in · 1 mm 0.0400 in · 1.016 mm 0.0410 in · 1.041 mm 0.0420 in · 1.067 mm 0.0430 in · 1.092 mm 0.0433 in · 1.1 mm 0.0465 in · 1.181 mm 3/64 in · 1.191 mm 0.0472 in · 1.2 mm 0.0512 in · 1.3 mm 0.0520 in · 1.321 mm 0.0550 in · 1.397 mm 0.0551 in · 1.4 mm 0.0591 in · 1.5 mm 0.0595 in · 1.511 mm 1/16 in · 1.587 mm 0.0630 in · 1.6 mm 0.0635 in · 1.613 mm 0.0669 in · 1.7 mm 0.0670 in · 1.702 mm 0.0700 in · 1.778 mm 0.0709 in · 1.8 mm 0.0730 in · 1.854 mm 0.0748 in · 1.9 mm 0.0760 in · 1.930 mm 5/64 in · 1.984 mm 0.0785 in · 1.994 mm 0.0787 in · 2 mm 0.0810 in · 2.057 mm 0.0820 in · 2.083 mm 0.0827 in · 2.1 mm 0.0860 in · 2.184 mm 0.0866 in · 2.2 mm 0.0890 in · 2.261 mm 0.0906 in · 2.3 mm 0.0935 in · 2.375 mm 3/32 in · 2.381 mm 0.0945 in · 2.4 mm 0.0960 in · 2.438 mm 0.0980 in · 2.489 mm 0.0984 in · 2.5 mm 0.0995 in · 2.527 mm 0.1015 in · 2.578 mm 0.1024 in · 2.6 mm 0.1040 in · 2.642 mm 0.1063 in · 2.7 mm 0.1065 in · 2.705 mm 7/64 in · 2.778 mm 0.1100 in · 2.794 mm 0.1102 in · 2.8 mm 0.1110 in · 2.819 mm 0.1130 in · 2.870 mm 0.1142 in · 2.9 mm 0.1160 in · 2.946 mm 0.1181 in · 3 mm 0.1200 in · 3.048 mm 0.1220 in · 3.1 mm 1/8 in · 3.175 mm 0.1260 in · 3.2 mm 0.1285 in · 3.264 mm 0.1299 in · 3.3 mm 0.1339 in · 3.4 mm 0.1360 in · 3.454 mm 0.1378 in · 3.5 mm 0.1405 in · 3.569 mm 9/64 in · 3.572 mm 0.1417 in · 3.6 mm 0.1440 in · 3.658 mm 0.1457 in · 3.7 mm 0.1470 in · 3.734 mm 0.1495 in · 3.797 mm 0.1496 in · 3.8 mm 0.1520 in · 3.861 mm 0.1535 in · 3.9 mm 0.1540 in · 3.912 mm 5/32 in · 3.969 mm 0.1570 in · 3.988 mm 0.1575 in · 4 mm 0.1590 in · 4.039 mm 0.1610 in · 4.089 mm 0.1614 in · 4.1 mm 0.1654 in · 4.2 mm 0.1660 in · 4.216 mm 0.1693 in · 4.3 mm 0.1695 in · 4.305 mm 11/64 in · 4.366 mm 0.1730 in · 4.394 mm 0.1732 in · 4.4 mm 0.1770 in · 4.496 mm 0.1772 in · 4.5 mm 0.1800 in · 4.572 mm 0.1811 in · 4.6 mm 0.1820 in · 4.623 mm 0.1850 in · 4.699 mm 0.1850 in · 4.7 mm 3/16 in · 4.762 mm 0.1890 in · 4.8 mm 0.1890 in · 4.801 mm 0.1910 in · 4.851 mm 0.1929 in · 4.9 mm 0.1935 in · 4.915 mm 0.1960 in · 4.978 mm 0.1969 in · 5 mm 0.1990 in · 5.055 mm 0.2008 in · 5.1 mm 0.2010 in · 5.105 mm 13/64 in · 5.159 mm 0.2040 in · 5.182 mm 0.2047 in · 5.2 mm 0.2055 in · 5.220 mm 0.2087 in · 5.3 mm 0.2090 in · 5.309 mm 0.2126 in · 5.4 mm 0.2130 in · 5.410 mm 0.2165 in · 5.5 mm 7/32 in · 5.556 mm 0.2205 in · 5.6 mm 0.2210 in · 5.613 mm 0.2244 in · 5.7 mm 0.2280 in · 5.791 mm 0.2283 in · 5.8 mm 0.2323 in · 5.9 mm 0.2340 in · 5.944 mm 15/64 in · 5.953 mm 0.2362 in · 6 mm 0.2380 in · 6.045 mm 0.2402 in · 6.1 mm 0.2420 in · 6.147 mm 0.2441 in · 6.2 mm 0.2460 in · 6.248 mm 0.2480 in · 6.3 mm 0.2500 in · 6.350 mm 1/4 in · 6.350 mm 0.2520 in · 6.4 mm 0.2559 in · 6.5 mm 0.2570 in · 6.528 mm 0.2598 in · 6.6 mm 0.2610 in · 6.629 mm 0.2638 in · 6.7 mm 17/64 in · 6.747 mm 0.2660 in · 6.756 mm 0.2677 in · 6.8 mm 0.2717 in · 6.9 mm 0.2720 in · 6.909 mm 0.2756 in · 7 mm 0.2770 in · 7.036 mm 0.2795 in · 7.1 mm 0.2810 in · 7.137 mm 9/32 in · 7.144 mm 0.2835 in · 7.2 mm 0.2874 in · 7.3 mm 0.2900 in · 7.366 mm 0.2913 in · 7.4 mm 0.2950 in · 7.493 mm 0.2953 in · 7.5 mm 19/64 in · 7.541 mm 0.2992 in · 7.6 mm 0.3020 in · 7.671 mm 0.3031 in · 7.7 mm 0.3071 in · 7.8 mm 0.3110 in · 7.9 mm 5/16 in · 7.938 mm 0.3150 in · 8 mm 0.3160 in · 8.026 mm 0.3189 in · 8.1 mm 0.3228 in · 8.2 mm 0.3230 in · 8.204 mm 0.3268 in · 8.3 mm 21/64 in · 8.334 mm 0.3307 in · 8.4 mm 0.3320 in · 8.433 mm 0.3346 in · 8.5 mm 0.3386 in · 8.6 mm 0.3390 in · 8.611 mm 0.3425 in · 8.7 mm 11/32 in · 8.731 mm 0.3465 in · 8.8 mm 0.3480 in · 8.839 mm 0.3504 in · 8.9 mm 0.3543 in · 9 mm 0.3580 in · 9.093 mm 0.3583 in · 9.1 mm 23/64 in · 9.128 mm 0.3622 in · 9.2 mm 0.3661 in · 9.3 mm 0.3680 in · 9.347 mm 0.3701 in · 9.4 mm 0.3740 in · 9.5 mm 3/8 in · 9.525 mm 0.3770 in · 9.576 mm 0.3780 in · 9.6 mm 0.3819 in · 9.7 mm 0.3858 in · 9.8 mm 0.3860 in · 9.804 mm 0.3898 in · 9.9 mm 25/64 in · 9.922 mm 0.3937 in · 10 mm 0.3970 in · 10.084 mm 0.3976 in · 10.1 mm 0.4016 in · 10.2 mm 0.4040 in · 10.262 mm 0.4055 in · 10.3 mm 13/32 in · 10.319 mm 0.4094 in · 10.4 mm 0.4130 in · 10.490 mm 0.4134 in · 10.5 mm 0.4173 in · 10.6 mm 0.4213 in · 10.7 mm 27/64 in · 10.716 mm 0.4252 in · 10.8 mm 0.4291 in · 10.9 mm 0.4331 in · 11 mm 0.4370 in · 11.1 mm 7/16 in · 11.112 mm 0.4409 in · 11.2 mm 0.4449 in · 11.3 mm 0.4488 in · 11.4 mm 0.4528 in · 11.5 mm 29/64 in · 11.509 mm 0.4567 in · 11.6 mm 0.4606 in · 11.7 mm 0.4646 in · 11.8 mm 0.4685 in · 11.9 mm 15/32 in · 11.906 mm 0.4724 in · 12 mm 0.4764 in · 12.1 mm 0.4803 in · 12.2 mm 0.4843 in · 12.3 mm 31/64 in · 12.303 mm 0.4882 in · 12.4 mm 0.4921 in · 12.5 mm 0.4961 in · 12.6 mm 1/2 in · 12.700 mm 0.5000 in · 12.7 mm 0.5039 in · 12.8 mm 0.5079 in · 12.9 mm 0.5118 in · 13 mm 33/64 in · 13.097 mm 17/32 in · 13.494 mm 35/64 in · 13.891 mm 9/16 in · 14.287 mm 37/64 in · 14.684 mm 19/32 in · 15.081 mm 39/64 in · 15.478 mm 5/8 in · 15.875 mm 41/64 in · 16.272 mm 21/32 in · 16.669 mm 43/64 in · 17.066 mm 11/16 in · 17.462 mm 45/64 in · 17.859 mm 23/32 in · 18.256 mm 47/64 in · 18.653 mm 3/4 in · 19.050 mm 49/64 in · 19.447 mm 25/32 in · 19.844 mm 51/64 in · 20.241 mm 13/16 in · 20.637 mm 53/64 in · 21.034 mm 27/32 in · 21.431 mm 55/64 in · 21.828 mm 7/8 in · 22.225 mm 57/64 in · 22.622 mm 29/32 in · 23.019 mm 59/64 in · 23.416 mm 15/16 in · 23.813 mm 61/64 in · 24.209 mm 31/32 in · 24.606 mm 63/64 in · 25.003 mm 1 in · 25.400 mm Show outline Selected nominal diameter
#7 0.2010 in · 5.105 mm Identification limit
Calibrate twice before using the outline. Close sizes will be returned as a candidate group.
Safe handling
Compare only a clean, stationary cylindrical shank. Do not press a rotating, hot, oily, or
sharp drill point against the screen. Confirm the final size with a caliper or drill gauge.