Wire Gauge, Imperial, and Metric Conversions

This table spans diameters from 1/64 inch to 1 inch, listing every 1/64-inch fractional increment and every standard AWG (American Wire Gauge) size within that range. Each diameter is shown in fractional inches (where exact), decimal inches, and millimeters. Decimal inches are rounded to four decimal places and metric values to three decimal places using standard rounding.

Wire Gauge	Millimeters	Inches (decimal)	Inches (fractional)
—	0.397 mm	0.0156 in	1/64 in
26 g	0.405 mm	0.0159 in	—
25 g	0.455 mm	0.0179 in	—
24 g	0.511 mm	0.0201 in	—
23 g	0.573 mm	0.0226 in	—
22 g	0.644 mm	0.0253 in	—
21 g	0.723 mm	0.0285 in	—
—	0.794 mm	0.0313 in	1/32 in
20 g	0.812 mm	0.032 in	—
19 g	0.912 mm	0.0359 in	—
—	1 mm	0.0394 in	—
18 g	1.024 mm	0.0403 in	—
17 g	1.15 mm	0.0453 in	—
—	1.191 mm	0.0469 in	3/64 in
16 g	1.291 mm	0.0508 in	—
15 g	1.45 mm	0.0571 in	—
—	1.588 mm	0.0625 in	1/16 in
14 g	1.628 mm	0.0641 in	—
13 g	1.828 mm	0.072 in	—
—	1.984 mm	0.0781 in	5/64 in
—	2 mm	0.0787 in	—
12 g	2.053 mm	0.0808 in	—
11 g	2.305 mm	0.0907 in	—
—	2.381 mm	0.0938 in	3/32 in
10 g	2.588 mm	0.1019 in	—
—	2.778 mm	0.1094 in	7/64 in
9 g	2.906 mm	0.1144 in	—
—	3 mm	0.1181 in	—
—	3.175 mm	0.125 in	1/8 in
8 g	3.264 mm	0.1285 in	—
—	3.572 mm	0.1406 in	9/64 in
7 g	3.665 mm	0.1443 in	—
—	3.969 mm	0.1563 in	5/32 in
—	4 mm	0.1575 in	—
6 g	4.115 mm	0.162 in	—
—	4.366 mm	0.1719 in	11/64 in
5 g	4.621 mm	0.1819 in	—
—	4.763 mm	0.1875 in	3/16 in
—	5 mm	0.1969 in	—
—	5.159 mm	0.2031 in	13/64 in
4 g	5.189 mm	0.2043 in	—
—	5.556 mm	0.2188 in	7/32 in
3 g	5.827 mm	0.2294 in	—
—	5.953 mm	0.2344 in	15/64 in
—	6 mm	0.2362 in	—
—	6.35 mm	0.25 in	1/4 in
2 g	6.544 mm	0.2576 in	—
—	6.747 mm	0.2656 in	17/64 in
—	7 mm	0.2756 in	—
—	7.144 mm	0.2813 in	9/32 in
1 g	7.348 mm	0.2893 in	—
—	7.541 mm	0.2969 in	19/64 in
—	7.938 mm	0.3125 in	5/16 in
—	8 mm	0.315 in	—
0 g	8.251 mm	0.3249 in	—
—	8.334 mm	0.3281 in	21/64 in
—	8.731 mm	0.3438 in	11/32 in
—	9 mm	0.3543 in	—
—	9.128 mm	0.3594 in	23/64 in
00 g	9.266 mm	0.3648 in	—
—	9.525 mm	0.375 in	3/8 in
—	9.922 mm	0.3906 in	25/64 in
—	10 mm	0.3937 in	—
—	10.319 mm	0.4063 in	13/32 in
000 g	10.405 mm	0.4096 in	—
—	10.716 mm	0.4219 in	27/64 in
—	11 mm	0.4331 in	—
—	11.113 mm	0.4375 in	7/16 in
—	11.509 mm	0.4531 in	29/64 in
0000 g	11.684 mm	0.4600 in	—
—	11.906 mm	0.4688 in	15/32 in
—	12 mm	0.4724 in	—
—	12.303 mm	0.4844 in	31/64 in
—	12.7 mm	0.5 in	1/2 in
—	13 mm	0.5118 in	—
—	13.097 mm	0.5156 in	33/64 in
00000 g	13.12 mm	0.5165 in	—
—	13.494 mm	0.5313 in	17/32 in
—	13.891 mm	0.5469 in	35/64 in
—	14 mm	0.5512 in	—
—	14.288 mm	0.5625 in	9/16 in
—	14.684 mm	0.5781 in	37/64 in
000000 g	14.733 mm	0.5800 in	—
—	15 mm	0.5906 in	—
—	15.081 mm	0.5938 in	19/32 in
—	15.478 mm	0.6094 in	39/64 in
—	15.875 mm	0.625 in	5/8 in
—	16 mm	0.6299 in	—
—	16.272 mm	0.6406 in	41/64 in
—	16.669 mm	0.6563 in	21/32 in
—	17 mm	0.6693 in	—
—	17.066 mm	0.6719 in	43/64 in
—	17.463 mm	0.6875 in	11/16 in
—	17.859 mm	0.7031 in	45/64 in
—	18 mm	0.7087 in	—
—	18.256 mm	0.7188 in	23/32 in
—	18.653 mm	0.7344 in	47/64 in
—	19 mm	0.748 in	—
—	19.05 mm	0.75 in	3/4 in
—	19.447 mm	0.7656 in	49/64 in
—	19.844 mm	0.7813 in	25/32 in
—	20 mm	0.7874 in	—
—	20.241 mm	0.7969 in	51/64 in
—	20.638 mm	0.8125 in	13/16 in
—	21 mm	0.8268 in	—
—	21.034 mm	0.8281 in	53/64 in
—	21.431 mm	0.8438 in	27/32 in
—	21.828 mm	0.8594 in	55/64 in
—	22 mm	0.8661 in	—
—	22.225 mm	0.875 in	7/8 in
—	22.622 mm	0.8906 in	57/64 in
—	23 mm	0.9055 in	—
—	23.019 mm	0.9063 in	29/32 in
—	23.416 mm	0.9219 in	59/64 in
—	23.813 mm	0.9375 in	15/16 in
—	24 mm	0.9449 in	—
—	24.209 mm	0.9531 in	61/64 in
—	24.606 mm	0.9688 in	31/32 in
—	25 mm	0.9843 in	—
—	25.003 mm	0.9844 in	63/64 in
—	25.4 mm	1 in	1 in