Reference Charts -- A Jewelry Maker's best friend :)

When working with jewelry, putting everything into inventory and organizing all the stuff you just bought online into your collection....you'll come across metric vs imperial increments, gages, weights -- god knows what.

Best thing to do is print out these reference charts and keep 'em handy.
I use them all the time so my head doesn't blow up when I receive a new shipment!


INCHES TO MILIMETERS

Inches	Millimetres
1/32	0.79
1/16	1.59
3/32	2.38
1/8	3.18
5/32	3.97
3/16	4.76
7/32	5.56
1/4	6.35
9/32	7.14
5/16	7.94
11/32	8.73
3/8	9.53
13/32	10.32
7/16	11.11
15/32	11.91
1/2	12.7
17/32	13.49
9/16	14.29
19/32	15.08
5/8	15.88
21/32	16.67
11/16	17.46
23/32	18.26
3/4	19.05
25/32	19.84
13/16	20.64
27/32	21.43
7/8	22.23
29/32	23.02
15/16	23.81
31/32	24.61

MILIMETERS TO INCHES

Size in Millimetres	Nearest Equivalent in Inches
1	1/32
2	1/16
3	1/8
4	5/32
5	3/16
6	1/4
7	9/32
8	5/16
9	11/32
10	3/8
11	7/16
12	15/32
13	1/2
14	9/16
15	19/32
16	10/16
17	11/16
18	23/32
19	3/4
20	13/16

NECKLACE LENGTHS

Choker	16 Inches
Princess	18 Inches
Matinee	24 Inches
Opera	32 Inches
Rope	48 Inches

WIRE GAUGES

Gauge	Inches (Decimal)	Millimetres	Inches (Fraction)
1	0.289	7.348
2	0.258	6.543
	0.250	6.350	1/4
	0.234	5.953	15/64
3	0.229	5.827
	0.219	5.556	7/32
4	0.204	5.189
	0.203	5.154	11/64
	0.188	4.762	3/16
5	0.182	4.621
	0.172	4.366	11/64
6	0.162	4.115
	0.156	3.969	5/32
7	0.144	3.664
	0.141	3.572	9/64
8	0.128	3.263
	0.125	3.175	1/8
9	0.114	2.906
	0.109	2.778	7/64
10	0.102	2.59
	0.094	2.381	3/32
11	0.091	2.31
12	0.081	2.06
	0.078	1.984	5/64
13	0.072	1.83
14	0.064	1.63
	0.063	1.588
15	0.057	1.449
16	0.051	1.291
	0.047	1.191	3/64
17	0.045	1.14
18	0.04	1.02
19	0.036	0.91
20	0.032	0.81
	0.031	0.795	1/32
21	0.028	0.71
22	0.025	0.64
23	0.023	0.58
24	0.02	0.51
25	0.0179	0.455
26	0.0159	0.404
	0.016	0.396	1/64
27	0.0142	0.361
28	0.0126	0.32
29	0.0113	0.287
30	0.01	0.25
31	0.0089	0.226
32	0.008	0.2
33	0.0071	0.18
34	0.0063	0.16
35	0.0056	0.142
36	0.005	0.13
37	0.0045	0.114
38	0.004	0.1

INTERNATIONAL RING SIZE CONVERSION CHART

US / Canada	British	Irish	Australian
1/4
1/2	A
3/4	A 1/2
1	B	1
1 1/4	B 1/2
1 1/2	C
1 3/4	C 1/2
2	D	2	1.5
2 1/4	D 1/2
2 1/2	E	3	2.75
2 3/4	E 1/2
3	F	4	4.00
3 1/4	F 1/2	5	5.25
3 1/2	G
3 3/4	G 1/2
4	H	7
4 1/4	H 1/2		7.75
4 1/2	I	8
4 3/4	J		9
5	J 1/2	9
5 1/4	K		10
5 1/2	K 1/2	10
5 3/4	L		11.75
6	L 1/2	11	12.75
6 1/4	M	12
6 1/2	M 1/2	13	14
6 3/4	N
7	N 1/2	14	15.25
7 1/4	0
7 1/2	0 1/2	15	16.5
7 3/4	P
8	P 1/2	16	17.75
8 1/4	Q
8 1/2	Q 1/2	17
8 3/4	R		19
9	R 1/2	18
9 1/4	S		20.25
9 1/2	S 1/2	19
9 3/4	T		21.5
10	T 1/2	20
10 1/4	U	21
10 1/2	U 1/2	22	22.75
10 3/4	V
11	V 1/2	23
11 1/4	W		25
11 1/2	W 1/2	24
11 3/4	X
12	X 1/2	25	27.5
12 1/4	Y
12 1/2	Z	26	28.75
12 3/4	Z 1/2
13		27
13 1/4	Z1
13 1/2
13 3/4	Z2
14	Z3
14 1/4
14 1/2	Z4
14 3/4
15
15 1/4
15 1/2
15 3/4
16

LENGTH AND WEIGHT MEASUREMENT CONVERSION CHART

To Convert...	Into...	Multiply By...
centimetres	inches	0.394
	feet	0.0328
	metres	0.01
	millimetres	10
metres	centimetres	100
	feet	3.281
	inches	39.37
inches	centimetres	2.54
	feet	0.0833
	metres	0.0254
	yards	0.0278
yards	inches	36
	feet	3
	metres	0.914
grammes	ounces	0.035
	pounds	0.002
	kilogrammes	0.001
ounces	grammes	28.35
	pounds	0.0625
	kilogrammes	0.028
pounds	grammes	453.59
	ounces	16
	kilogrammes	0.454

WIRE WRAP STRENGTH STANDARDS

Wire Guage	Acceptable Weight	Stretch-Causing Weight
26 dead soft	350g	400g
26 soft	450g	500g
26 half hard	600g	650g
26 hard	900g	1000g
24 dead soft	1250g	1500g
24 half hard	1700g	2000g
22 soft	4000g	over 4000g

WIRE GAUGES VS. STONE AND DRILL HOLE SIZES

Stone Size	Hole Diameter (mm)	Wire Guage #	Wrap Times
small	less 0.5	26	1
small	0.5 ~ 0.8	26	2 ~ 3
medium	0.8 ~ 1	24	1
medium	1.1 ~ 1.5	24	2 ~ 3
medium ~ big	1.6 ~ 1.8	22	1
medium ~ big	1.9 ~ 2.5	22	2 ~ 3
big	over 2.5	20	1 ~ 2

There are obviously so many other charts you'd probably need, but I find that these are the ones I need the most! Feel free to contribute!