Gauges, Wires, Units, Drills, Screws

Theoretical Gauge Thickness

Aluminum Gauge Steel mm inches inches mm 0.142 .0056 35 .0075 0.191 0.160 .0063 34 .0082 0.208 0.180 .0071 33 .0090 0.229 0.203 .0080 32 .0097 0.246 0.226 .0089 31 .0105 0.267 0.254 .0100 30 .0120 0.305 0.287 .0113 29 .0135 0.343 0.320 .0126 28 .0149 0.378 0.361 .0142 27 .0164 0.417 0.404 .0159 26 .0179 0.455 0.455 .0179 25 .0209 0.531 0.511 .0201 24 .0239 0.607 0.574 .0226 23 .0269 0.683 0.643 .0253 22 .0299 0.759 0.724 .0285 21 .0329 0.836 0.813 .0320 20 .0359 0.912 0.912 .0359 19 .0418 1.062

Aluminum Gauge Steel mm inches inches mm 1.024 .0403 18 .0478 1.214 1.151 .0453 17 .0538 1.367 1.290 .0508 16 .0598 1.519 1.450 .0571 15 .0673 1.709 1.628 .0641 14 .0747 1.897 1.829 .0720 13 .0897 2.278 2.052 .0808 12 .1046 2.657 2.304 .0907 11 .1196 3.030 2.588 .1019 10 .1345 3.416 2.906 .1144 9 .1495 3.797 3.264 .1285 8 .1644 4.176 3.665 .1443 7 .1793 4.554 4.115 .1620 6 .1943 4.935 4.620 .1819 5 .2092 5.314 5.189 .2043 4 .2242 5.695 5.827 .2294 3 .2391 6.073

Copper and Aluminum Wire (Solid Core)

Gauge	Diameter		Ohms / 1000ft
	Inches	mm	Aluminum	Copper
10	0.1019	2.588	1.600	1.08
12	0.0808	2.052	2.545	1.71
14	0.0641	1.628	4.046	2.73
16	0.0508	1.290	6.427	4.35
18	0.0403	1.024	10.23	6.92
20	0.0320	0.813	16.19	10.9
22	0.0253	0.643	25.61	17.5
24	0.0201	0.511	40.72	27.7
26	0.0159	0.404	64.74	44.4
28	0.0126	0.320	104.0	70.7
30	0.0100	0.254	164.5	112
32	0.0080	0.203		164
34	0.0063	0.160		261
36	0.0050	0.127		414
38	0.0040	0.102		642
40	0.0031	0.079		1068
42	0.0025	0.064		1643
44	0.0020	0.051		2567
46	0.0016	0.040		4166

Liquid & Weight Equivalents

U.S. Gallon	4 qt = 8 pt = 16 cups = 128 fluid ozs
U.S. Gallon	3.785 liters
U.S. Gallon	231 cu inch = 3785.4 cu cm
U.S. Gallon	8.3370 pounds water
U.S. Gallon	.83 Imperial Gallon
quart	2 pt = 4 cups = 32 fl oz = 64 Tbs.
quart	0.9463 liters
ounce (U.S. fluid)	28.35 grams = 29.57 ml = 2 Tbs.
ounce (British fluid)	28.41 ml
tablespoon (Tbs)	0.5 fl oz. = 3 teaspoons
tablespoon (Tbs)	14.8 ml
liter	0.0353 cu ft = 1.05 quarts = 0.2642 gal (US)
kilogram	2.205 pounds = 1 liter water
stone	14 pounds

Temperature Equivalents

(Degree F - 32) X 5/9 = degrees Centigrade

(Degree C X 9/5) + 32 = degrees Fahrenheit

Length Equivalents

centimeter	0.394 inch
meter	3.28 feet = 39.4 inches
kilometer	0.621 statute mile
inch	2.54 centimeters
foot	12 inches = 30.48 centimeters
yard	3 feet = 0.914 meters
rod	16.5 feet = 1/40 furlong = 5.029 meters
furlong	660 feet = 1/8 mile = 201.168 meters
statute mile	5,280 feet = 1,760 yards
statute mile	1.61 kilometers
nautical mile	1 minute of arc = 1/60th degree at the equator
nautical mile	6,076 feet= 2025.33 yards = 1.15 miles
nautical mile	1.852 kilometers
league	18,228 feet = 3 nautical miles = 5.556 kilometers

Automotive Equivalents

mile/hr	88 feet/minute = 1.47 feet/second
mile/hr	1.61 km/hr
mile/gal	.425 km/lt
km/liter	2.35 miles/gallon
horsepower	torque * rpm / 5252

Drills, Decimals, Millimeters, Screws

Drill Size	Decimal	Millimeters	Screw	Tap Drill
1/64	0.0157	0.397
1/32	0.0313	0.794
	0.0394	1.000	M1x.25	.75mm
60	0.0400	1.016
59	0.0410	1.041
58	0.0420	1.067
57	0.0430	1.092
56	0.0465	1.181
3/64	0.0469	1.191
55	0.0520	1.321
54	0.0550	1.397
53	0.0595	1.511
1/16	0.0625	1.588	#2-56, #2-64	50, 51
52	0.0635	1.613
51	0.0670	1.702
50	0.0700	1.778
49	0.0730	1.854
48	0.0760	1.930
5/64	0.0781	1.984
47	0.0785	1.994
	0.0787	2.000	M2x.4	1.6mm
46	0.0810	2.057
45	0.0820	2.083
44	0.0860	2.184
43	0.0890	2.261
42	0.0935	2.375
3/32	0.0938	2.381	#4-40, #4-48	43, 42
41	0.0960	2.438
40	0.0980	2.489
39	0.0995	2.527
38	0.1015	2.578
37	0.1040	2.642
36	0.1065	2.705
7/64	0.1094	2.778
35	0.1100	2.794
34	0.1110	2.819
33	0.1130	2.870
32	0.1160	2.946
	0.1181	3.000	M3x.5	2.5mm
31	0.1200	3.048
1/8	0.1250	3.175	#6-32, #6-40	36, 33
30	0.1285	3.264
29	0.1360	3.454
	0.1378	3.500	M3.5x.6	2.9mm
28	0.1405	3.569
9/64	0.1406	3.572
27	0.1440	3.658
26	0.1470	3.734
25	0.1495	3.797
24	0.1520	3.861
23	0.1540	3.912
5/32	0.1562	3.969	#8-32, #8-36	29
22	0.1570	3.988
	0.1575	4.000	M4x.7	3.3mm
21	0.1590	4.039
20	0.1610	4.089
19	0.1660	4.216
18	0.1695	4.305
11/64	0.1719	4.366
17	0.1730	4.394
16	0.1770	4.496
15	0.1800	4.572
14	0.1820	4.623
13	0.1850	4.699
3/16	0.1875	4.763	#10-24, #10-32	25, 21
12	0.1890	4.801
11	0.1910	4.851
10	0.1935	4.915
9	0.1960	4.978
	0.1969	5.000	M5x.8	4.2mm
8	0.1990	5.055
7	0.2010	5.105
13/64	0.2031	5.159
6	0.2040	5.182
5	0.2055	5.220
4	0.2090	5.309
3	0.2130	5.410
7/32	0.2188	5.556	#12-24, #12-28	16, 14
2	0.2211	5.616
1	0.2280	5.791
15/64	0.2344	5.953
A	0.2340	5.944
	0.2362	6.000	M6x1	5mm
B	0.2380	6.045
C	0.2420	6.147
D	0.2460	6.248
1/4	0.2500	6.350	#14-20, 1/4-28	7, 3
E	0.2500	6.350
F	0.2570	6.528
G	0.2610	6.629
17/64	0.2656	6.747
H	0.2660	6.756
I	0.2720	6.909
	0.2756	7.000	M7x1	6mm
J	0.2770	7.036
9/32	0.2812	7.144
K	0.2810	7.137
L	0.2900	7.366
M	0.2950	7.493
19/64	0.2969	7.541
N	0.3020	7.671
5/16	0.3125	7.938	5/16-18, 5/16-24	F, I
	0.3150	8.000	M8x1.25	6.8mm
O	0.3160	8.026
P	0.3230	8.204
21/64	0.3281	8.334
Q	0.3320	8.433
R	0.3390	8.611
11/32	0.3438	8.731
S	0.3480	8.839
	0.3543	9.000	M9x1, M9x1.25	8mm, 7.8mm
T	0.3580	9.093
23/64	0.3594	9.128
U	0.3680	9.347
3/8	0.3750	9.525	3/8-16, 3/8-24	5/16, Q
V	0.3770	9.576
W	0.3860	9.804
25/64	0.3906	9.922
	0.3937	10.000	M10x1.25, M10x1.5	8.8mm, 8.5mm
X	0.3970	10.084
Y	0.4040	10.262
13/32	0.4062	10.319
Z	0.4130	10.490
27/64	0.4219	10.716
	0.4331	11.000	M11x1.5	9.5mm
7/16	0.4375	11.113	7/16-14, 7/16-20	U, 25/64
29/64	0.4531	11.509
15/32	0.4688	11.906
	0.4724	12.000	M12x1.5, M12x1.75	10.5mm, 10.2mm
31/64	0.4844	12.303
1/2	0.5000	12.700	1/2-13, 1/2-20	27/64, 29/64
	0.5118	13.000
33/64	0.5156	13.097
17/32	0.5312	13.494
35/64	0.5469	13.891
	0.5512	14.000	M14x1.25, M14x2	12.8mm, 12mm
9/16	0.5625	14.288	9/16-12, 9/16-18	31/64, 33/64
37/64	0.5781	14.684
	0.5906	15.000
19/32	0.5938	15.081
39/64	0.6094	15.478
5/8	0.6250	15.875	5/8-11, 5/8-18	17/32, 37/64
	0.6299	16.000	M16x1.5, M16x2	14.5mm, 14mm
41/64	0.6406	16.272
21/32	0.6562	16.669
	0.6693	17.000
43/64	0.6719	17.066
11/16	0.6875	17.463
45/64	0.7031	17.859
	0.7087	18.000	M18x1.5, M18x2.5	16.5mm, 15.5mm
23/32	0.7188	18.256
47/64	0.7344	18.653
	0.7480	19.000
3/4	0.7500	19.050	3/4-10, 3/4-16	21/32, 11/16
49/64	0.7656	19.447
25/32	0.7812	19.844
	0.7874	20.000	M20x1.5, M20x2.5	18.5mm, 17.5mm
51/64	0.7969	20.241
13/16	0.8125	20.638
	0.8268	21.000
53/64	0.8281	21.034
27/32	0.8438	21.431
55/64	0.8594	21.828
	0.8661	22.000	M22x1.5, M22x2.5	20.5mm, 19.5mm
7/8	0.8750	22.225	7/8-9, 7/8-14	49/64, 13/16
57/64	0.8906	22.622
	0.9055	23.000
29/32	0.9062	23.019
59/64	0.9219	23.416
15/16	0.9375	23.813
	0.9449	24.000	M24x1.5, M24x2.5	22.5mm, 22mm
61/64	0.9531	24.209
31/32	0.9688	24.608
63/64	0.9844	25.004
1	1.0000	25.400	1-8, 1-12, 1-14	7/8, 59/64, 15/16