Yarn Calculator – How Much Yarn for Your Project
There is nothing worse than being three rows from finishing a beautiful blanket and realising you are out of yarn.
Estimates are for an average maker using medium-weight yarn. Your tension, stitch pattern and size choices can move the number up or down — the range above builds in a 10% cushion.
The dye lot is gone from the shop, the colour is a shade off in the new batch, and your nearly finished project sits waiting.
On the other side, buying far too much leaves you with lonely skeins that never find a project.
Every knitter and crocheter has been on one side of this problem or the other.
Our free yarn calculator takes the guessing out of yarn shopping.
Pick your project, tell us how many yards are in one skein of your yarn, and it works out the yardage you need and how many skeins to buy.
Because every maker works a little differently, it shows the yardage as a range rather than a single rigid number, so you can plan with a comfortable cushion.
How to Use
Example
Suppose you are knitting an adult sweater and your chosen yarn has 200 yards per skein.
Select “Adult sweater” from the list and keep the skein size at 200.
The calculator starts with the standard estimate of 1,400 yards for an adult sweater, then adds a 10 percent cushion, giving a range of 1,400–1,540 yards.
Divide 1,400 by 200 and you get exactly 7 skeins.
If you wanted to cover the very top of the range, 1,540 divided by 200 rounds up to 8 skeins, so buying one spare skein is a smart move for a big project.
A scarf at 400 yards with the same 200-yard skeins needs just 2 skeins, and a throw blanket at 1,800 yards needs 9.
The bigger the project, the more that little cushion matters.
The Bottom Line
Yarn is too lovely, and too precious, to waste on guesswork.
A quick calculation before you shop means you buy enough to finish comfortably, without ending up with a shelf of spare skeins you never touch.
Remember that these numbers are estimates: a looser tension, a lacy stitch, a longer scarf or a bigger size will all use more yarn, which is why the calculator shows a range with a 10 percent cushion built in.
When in doubt, buy the extra skein, keep the receipt, and match the dye lot.
Then cast on with confidence, knowing the only thing left to worry about is picking your next project.
Frequently Asked Questions
How accurate are these yardage estimates?
They are solid averages for a typical maker using medium-weight yarn and a standard size, but they are still estimates. Your tension, stitch pattern and size all shift the true number.
What is a dye lot, and why does it matter?
A dye lot is the batch number printed on your yarn label, showing which dyeing run your skein came from. Skeins from different lots can look slightly different, even in the same colour.
How do I find the yards per skein?
It is printed on the yarn label, usually near the weight and the fibre content, listed as yards or metres. If your label only gives metres, multiply by 1.09 to get yards.
Does knitting use more yarn than crochet?
No — crochet generally uses about a third more yarn than knitting for the same size piece, because crochet stitches are bulkier. If you crochet with a dense stitch, lean toward the top of the range.
Should I buy an extra skein just in case?
For small projects like a hat or a scarf, the built-in 10 percent cushion is usually enough. For big projects like blankets and sweaters, one spare skein is wise insurance.
What if my project is not on the list?
Pick the closest match and adjust. A shawl is roughly like a scarf, a cushion cover is close to a baby blanket in yardage, and a child’s blanket sits between a baby blanket and a throw.
Keep Exploring
More handmade and crafty ideas for your next project.
