UK/US/Australian Knitting and Crochet Conversion Charts

Needle Size Conversion Chart
Millimeter range	US Knitting needle size	UK Knitting needle size	US Crochet hook size (letter)	US Crochet hook size	UK Crochet hook size
0.40 mm				16
0.50 mm				15
0.60 mm				14	6
0.75 mm				13
0.70 mm				12	5
0.80 mm				11
1.00 mm				10	4
1.15 mm				9
1.25 mm				8	3
1.50 mm				7	2.5
1.60 mm				6
1.70 mm				5
1.75 mm				4	2
1.85 mm				3
1.95 mm				2
2.00 mm	0	14		1	1
2.25 mm	1	13	B	0	0
2.50 mm		12
2.75 mm	2	12	C	2
3.00 mm		11
3.25 mm	3	10	D	3
3.50 mm	4		E	4
3.75 mm	5	9	F	5
4.00 mm	6	8	G	6
4.25 mm
4.50 mm	7	7		7
5.00 mm	8	6	H	8
5.50 mm	9	5	I	9
6.00 mm	10	4	J	10
6.50 mm	10.5	3	K	10.5
7.00 mm		2
7.50 mm		1
8.00 mm	11	0	L	11
9.00 mm	13		M/N	13
10.00 mm	15		N/P	15
12.00 mm
12.75 mm	17
15.00 mm	19		P/Q
16.00 mm			Q
19.00 mm	35		S
20.00 mm	36
25.00 mm	50
* Please note that conversions are approximate

Yarn Weight Conversion Chart
UK	USA	Australia
1 ply	Laceweight	2 ply
2 ply	Fingering	3 ply
3 ply	Sock	3 ply
4 ply	Sport	5 ply
DK	DK/Light Worsted	8 ply
Aran	Worsted	10 ply
Chunky	Bulky	12 ply
Super Chunky	Super Bulky	14 ply
* Please note that conversions are approximate