Crochet Conversion Tables: Your guide to crochet hook sizes in US, UK, Australia and New Zealand

Around the world, there are slight differences in terminology for hook sizes and yarn weights. So, if you're stuck on what hook size to use for a yarn or pattern, read on! LoveCrafts' handy conversion charts will help you choose the right crochet hook for your next project. Keep these charts close by to clear up any confusion! Print this page

Crochet Hook Size
Metric US
2.25 mm B-1
2.75 mm C-2
3.25 mm D-3
3.50 mm E-4
3.75 mm F-5
4.00 mm G-6
4.50 mm 7
5.00 mm H-8
5.50 mm I-9
6.00 mm J-10
6.50 mm K-10.5
8.00 mm L-11
9.00 mm M-13
10.00 mm N-15
12.00 mm P-16
15.00 mm P/Q
16.00 mm Q
19.00 mm S
20.00 mm S
Steel Crochet Hook Size
Metric US
0.50 mm 18
0.60 mm 16
0.75 mm 14
0.85 mm 13
1.00 mm 12
1.10 mm 11
1.25 mm 10
1.50 mm 8
1.65 mm 7
1.75 mm 6
1.90 mm 5
2.00 mm 4
Yarn Weights and Required Hook Sizes
UK US AUS Hook Size
Lace 1 Ply 2 Ply 1.50-2.25 mm
Fingering 2 Ply 3 Ply 2.25-3.50 mm
Sport 4 Ply 5 Ply 3.50-4.50 mm
DK DK 8 Ply 4.50-5.50 mm
Worsted Aran 10 Ply 5.50-6.50 mm
Chunky Bulky 12 Ply 6.50-9.00 mm
Super Chunky Super Bulky 14 Ply 9.00 mm (and above)
Crochet Terminology
British US
Double Crochet Single Crochet
Treble Double Crochet
Half Treble Half Double Crochet
Double Treble Treble
Triple Treble Double Treble
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