Knitting Needle and Crochet Hook Conversion Charts

A while back I wrote about inheriting boxes filled with Grandma's craft stuff.  I have more knitting needles and crochet hooks now than I think any one sane person should own, but I can't quite make myself give any away or sell the clearly vintage hooks.

This isn't all of them.

The challenge comes from trying to understand exactly what size some of them are.  This gets worse with some of the hooks when their marked with a 5 and seem to be about 5mm.  Actually, they're a UK size 5 hook which is really 5.5mm.

Fortunately for me, I also got this wee gadget that is especially helpful with sock needles that have no markings whatsoever.

Metric side

UK side

For everything else, there are these charts below.  I thought them worth sharing because sometimes I can't remember if it's a 10 or 11 needle I need right now and it's difficult to tell the difference with the naked eye.

Knitting Needle Conversion Chart

Metric (mm)	US	UK & Canadian
2.0	0	14
2.25	1	13
2.75	2	12
3.0	-	11
3.25	3	10
3.5	4	-
3.75	5	9
4.0	6	8
4.5	7	7
5.0	8	6
5.5	9	5
6.0	10	4
6.5	10 1/2	3
7.0	-	2
7.5	-	1
8.0	11	0
9.0	13	00
10.0	15	000
12.0	17	-
16.0	19	-
19.0	35	-
25.0	50	-

Crochet Hook Conversion Chart

Metric (mm)	US	UK & Canadian
2.0	-	14
2.25	B/1	13
2.5	-	12
2.75	C/2	-
3.0	-	11
3.25	D/3	10
3.5	E/4	9
3.75	F/5	-
4.0	G/6	8
4.5	7	7
5.0	H/8	6
5.5	I/9	5
6.0	J/10	4
6.5	K/10 1/2	3
7.0	-	2
8.0	L/11	0
9.0	M/13	00
10.0	N/15	000