Crochet/knitting newbie question:

[hedgehog]

I'm looking at a pattern that calls for 2 balls of X. If I substitute Yarn y of the same weight (worsted for worsted), I assume I need to match the yardage. So if 2 balls of X total 500 yards, and 5 balls of Y total 500 yards, I'm OK.

is this right?

[libodem]

1. I don't know

But I can't imagine otherwise?

[Arkansas Granny]

2. You should be OK, especially if you've done a test swatch to check your gauge is the same

as the pattern calles for. I like to have a little more on hand than the pattern calls for, just in case, since I tend to knit/crochet with a little looser tension that some others.

What are you making?

[hedgehog]

3. Right now I'm making a baby afghan for an expected grandchild

It's my second attempt - the first afghan grew to full size and has been claimed by my daughter!

[Arkansas Granny]

4. Congratulations on the grandchild! I hope the afghan turns out well.

You'll have to post some pictures when you get it finished.

[SheilaT]

5. Same weight, worsted and worsted,

or bulky and bulky, and so on, the substitution will be fine, so long as the total yardage is the same.

Have lots of fun!

[hedgehog]

6. Thank you!

[surrealAmerican]

7. Probably.

You can usually substitute a same-weight yarn if the yardage is the same, but there can be differences if the yarns are different fibers. Some yarns, like wool, draw in while others, like silk, drape.

Since it's a blanket, this might work anyway, you shouldn't be too far off, and a small difference in finished size won't be a problem.