From time to time you will see yarn listed for sale in pounds and ounces rather than grammes. You will also often find yarn amounts listed in pounds and ounces (or lbs and oz) in older patterns. This can cause quite a lot of confusion and it can be difficult to know just how much yarn is enough, particularly if it's from your yarn stash.

Here is a chart which will help you to work out how much yarn you will need. All that may be required is some simple addition - if for example you require 28 ounces (28 oz) of yarn for a project, simply look down the Ounces column till you see the number 10. Look across to see the amount in Grammes and multiply this by 2. Now look down the Ounces column till you see the number 8. Look next to it to get the amount needed in grammes for 8 ounces of yarn, and add this amount to the number you already have. You now know how many grammes of yarn you need for a 28 ounce project. It's always a good idea to add a couple of balls extra to the final amount required, just to be on the safe side. The table converting grammes to ounces works in exactly the same way.

Another thing you must bear in mind is that the yardage in any ball of yarn varies according to the type. If the original yarn used was acrylic and you are using wool, allow one to two balls extra because wool has less length per gramme than acrylic. The same goes for cotton in relation to wool. Always if you can check up on the final yardage per ball required as well as the weight in grammes or ounces.