Like QuiltnNan said that is why we have a thread collection. I keep several big spools of many colors on hand.

I use cone thread when quilting in ivory or natural....always have a spare on hand of either color.

I always make sure when I by thread to buy double.

Once you run out of thread during your quilting you will try not to let that happen again! Trust me I had a thread that I was testing and thought the area was not going to be more than what thread I had but ran out. I don't do that anymore I would just rather add it to my collection.

I always buy extra. Don't want to take the chance of running out in the middle of a project!

I make sure i have enough thread before i start a quilting project and with my left overs i use theem some other time or use them for piecing.....it's away of using up odd colors of thread i have on hand.......no one will see the thread that you piece with........

Reminder, when you purchase the thread, buy more and if you don't use it, return it (like any of us would not just keep it for a future project!!!). But, when in doubt, that is a better option then to run out just before you finish the project.
I am always telling my customers to keep their receipts (I keep a baggie with the project). Then, they are not only able to return an item, but if they need more, they have the actual sku # so they get the exact item. You have no idea how many shades of beige there are until you try to remember what you previously bought!

This is great advice! I had never thought of keeping receipts together per project!

Fyi: I finished the quilt and the 164 yards was more than enough to quilt a 3/4" meander edge to edge. (bobbin thread was a different kind). :)

Once when placing an order with Superior threads, the lady taking my order asked me the size of the quilt and then told me how many spools to purchase. I was curious how other quilters knew how much thread to purchase per quilt.

Just for future use.
Couldn't you figure how wide the quilt Is (in your case 1 yd and how many passes you want to make (say every 3 inches straight or diagonal doesn't matter ) which would mean 12 passes which would be 12 yds. Would have to estimate for any zig zag and 1 yd for progress from row to row. It would be a lot of thinking.