Long tail cast on calculator


Need to cast on using the long tail cast on method? Not sure how much yarn to use? Well I've worked it out for you!

The long tail cast on is my favourite cast on method, it creates an elasticated edge and gives you the first row of stitches, but it also comes with the danger of running out of yarn before you've cast on the amount of stitches you need. Pick the needle size you're using and I'll tell you approximately how much yarn you'll need to cast on.

These amounts are appointees and include a 10cm (4in) cast on tail. For good luck I always add a little extra yarn. 

Knitting needle size


Yarn weight

Amount of yarn needed per 10 stitches (cm)
Amount of yarn needed per 10 stitches (in)
2.00mm / 0
Laceweight / Fingering 25cm 10in
3.00mm / 3
Sock 40cm 16in
4.00mm / 6
DK 50cm 20in
5.00mm / 8
Worsted / Aran 70cm 28in
6.00mm / 10
Chunky 80cm 32in
7.00mm / 10½
Chunky 90cm 36in
8.00mm / 11
Super Chunky 100cm 40in
9.00mm / 13
Super Chunky
110cm 44in
10.00mm / 15
Super Chunky
130cm 50in
12.00mm / 17
150cm 60in
15.00mm / 19
170cm 70in
20.00mm / 35
200cm 80in
25.00mm / 50
250cm 100in