Substituting Yarn

[Katelyntries]

I am trying to make a blanket from a Yarnspirations pattern that uses Bernat Velvet Plus Yarn but I want to substitute Bernat Blanket Confetti. Will this work as a substitution? The pattern requires 9 balls of Velvet Plus. Could I use the same amount of yarn, or would I need to use more?

Bernat Velvet Plus, 300 g/10.5 oz, 71 m/78 yds : 4” x 4” (10 cm x 10 cm) 7 sc x 7 rows with 9 mm crochet hook

Bernat Blanket Confetti, 300 g/10.5 oz, 161 m/176 yds: 4” x 4” (10 cm x 10 cm) 7 sc x 8 rows with 8 mm crochet hook

Any tips would be appreciated.

[greyhoundgrandma]

I thought this was going to be an easy answer since they are both #6 weight, super bulky yarns. But there is a large difference in the yards per ounces in each one. Hopefully someone smarter than me or familiar with the yarns can answer this.

[NCcountrygal]

https://joyofmotioncrochet.com/substitute-yarn-for-crochet-patterns/
This article touches on some issues to consider and then provides link to yarnsub. 

[Granny Square]

Since they are the same 'weight' class (meaning thickness measured in wraps per inch, like both US#6 bulky in your case), you want to buy the same number of yards as called out by the pattern, not ounces.  You need the same distance of yarn of the same weight class to go back and forth (or round and round) to get the same size "end thing".  Different yarn ingredients (acrylic, cotton, wool, etc. ), and the way they're spun aren't going to be the same scale weight per yard.

In your case, both ball bands' gauges are awfully close 1 hook size apart, so if this were my project I'd buy enough skeins of the 'sub yarn' to cover the yardage of the original pattern, and round up (in other words, not down - make sure I bought more yardage of the sub yarn than there are in the 9 balls of the pattern yarn.

Bernat Velvet Plus, 300 g/10.5 oz, 71 m/78 yds : 4” x 4” (10 cm x 10 cm) 7 sc x 7 rows with 9 mm crochet hook (pattern yarn, total for 9 balls=702 yards)

Bernat Blanket Confetti, 300 g/10.5 oz, 161 m/176 yds: 4” x 4” (10 cm x 10 cm) 7 sc x 8 rows with 8 mm crochet hook 4 balls = 704 yards dang, that's close, but you should (hopefully) be good since the pattern should have rounded up to cover the yardage needed.