650 grams is 22.945 ounces, which is approximately 23 ounces of yarn. Assuming 50 yards per ounce (according to a chart at Annie's Attic), you'd have 1147, or to round it off about 1150, yards in 650 grams.
To add to that, I have a skein of Red Heart Super Saver Worsted Weight yarn in hand. It says 7 oz. 198g, 364 yds, 333 m. Using that measurement, 650g would be about 1165 yards.
That said, not all worsted weight yarn weighs the same, so 650 grams of one brand may not be equal to another brand. If you are purchasing yarn for a particular project, I suggest buying more than you think you need to be sure you have enough of the same dye lot for your project.
You can not determine how many yards from the weight of the skein or cone. 50 grams is 1.75 ounces but it would depend on the exact thickness and type of yarn to know how many yards. The thicker the yarn the less the yards as a rule. Example a 50 gram ball of sport yarn can be anywhere from 110 to 170 yards give or take , but a 50 gram ball of bulky can be anywhere from 30 yards to 60 yards give or take ..
It will depend on the type of yarn. 225 yards of worsted weight yarn is about 100g, but 225 yards of sock weight yarn is about 25g. What is the yarn type?
Your answer depends on the weight of the yarn -- thread weight yarn weighing a total of 100 grams will contain more yardage than a bulky weight yarn ball weighing 100 grams.
The number of yards of yarn in 620 grams depends entirely on the unique qualities of the yarn. First of all, the weight, or thickness, of the yarn can influence the number of yards in a specific number of grams. For instance, 10 yards of laceweight yarn will weigh much less than 10 yards of bulky weight yarn. Second, the type of fiber of the yarn also needs to be taken into account. Certain fibers, like cotton, bamboo, and silk, tend to be much heavier than fibers like wool or alpaca. Therefore, 10 yards of cotton yarn will weigh more than 10 yards of wool yarn, even if the two yarns are of equal thickness. Therefore, it is difficult to determine the yardage of your yarn without further information. If you know the fiber and the weight (thickness) of the yarn (such as laceweight, fingering weight, sportweight, worsted, etc.), you can find a yarn with a similar weight and fiber on a website such as yarndex.com and compare its yardage with your yarn. However, this method can get you only an estimate, and is not guaranteed to be accurate. If you must know specifically how many yards of yarn you have, you can purchase a device that measures it as you spin it into a ball. A Yarn Meter such as this one from knitpicks.com: http://www.knitpicks.com/accessories/Knitting_Yarn_Meter__D80179.html can measure exactly how many yards of yarn you have.
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There is no hard and fast number that I could give you as an answer. It all depends on what the yarn is made of, what "weight" the yarn is (sock versus bulky, for example). So, as asked, this isn't really an answerable question--there is too much unknown about your yarn to answer with any certainty. My best suggestion would be to go to the yarn manufacturers website and look there for your answer. Or, go back to where you purchased the yarn, and ask there.
It depends on the yarn weight. Most ball bands will give a length to weight conversion if you look carefully. (It's often in small print). There is a rough conversion chart on the Crochet World blog, crochet-world.com/blog/?p=7272
There are several places where you can purchase bulky baby yarn. Hobby Lobby and Jo-Ann Fabric & Crafts usually carries bulky baby yarn in most stores. Online the yarn can be bought at Yarn Supply and Amazon.
There should be 836 yards in a package of 16oz of yarn.
There is approx. 150 yards in 50 grams of WORSTED weight yarn so approx 2250 yards in 750g. That is very approximate as different yarns weigh differently and contain different yard amounts in a skein. If you are asking about fingering, sport or chunky weight, the answer would be different.
It is hard to say . . . it depends on whether the yarn is fine, bulky, or somewhere in the middle.
1. have a look at your pattern and see how many grams of yarn it will take to make the patter. 2. some where on the ball of yarn it should say how many grams are in the ball. 3. add up the number of balls it would take to make the pattern. For example if a pattern calls for 730 grams of bulky yarn and the ball only has 200 grams then you would need about 5 balls of bulky or similar weight yarn to complete the pattern.