In general, dk and worsted mean much the same thing. Dk is used in the UK and worsted in the US. However, there is a lot of variation between brands. The best idea is to check the length and weight information on the ball bands. I do find that US worsted weight patterns make up well in dk, but I always have lots left over!
http://www.theknittingsite.com/knitting-conversion-tables/
4ply is NOT a yarn weight. Many 4ply yarns in the US are worsted weight. DK is a lighter yarn weight.
Most 4-ply yarns are medium-weight, which may carry the name worsted weight yarn. Ply is a complicated thing. Thickness and ply of yarn is different depending on where the yarn is manufactured. In the U.S. worsted weight is generally 4 ply. The number of plies is not always an indication of weight, however. It is just tells you how many strands are used in that type of yarn.
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
See http://www.YarnStandards.com for how the categories of yarn weights compare in terms of relative gauges and needle sizes used to achieve those gauges. Worsted weight (Category 4 - Medium) is the yarn commonly used to knit sweaters in the U.S. U.K. knitters often use a slightly thinner yarn called "DK" (double knitting), which falls into Category 3 - Light. Worsted weight yarn is typically knit at 20 sts/4 in or 10 cm on US 7/4.5mm needles, whereas DK weight yarn is typically knit at 22 sts/4 inches or 10 cm on US 5/3.75mm needles. Some countries still use the old 2-ply, 4-ply, 6-ply, 8-ply classification to describe yarns, where 4-ply is fingering weight, 6-ply is sport weight, 8-ply is DK, and 10-ply is worsted weight. One problem with that system of classification is that it assumes a standard ply weight. There are many yarns these days (particularly in the Bulky and Super Bulky categories 5 and 6) that are single-ply yarns which knit at various gauges on various needle sizes.
I don't know how many plies it has, but it knits up worsted weight.
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 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?
About 1700 yards, though yarns do vary. Yardages are often given on the ball band.
This varies with the thickness of the yarn. A conversion from weight to length should be given on the ball band. For worsted weight yarn 400 yd would be about 227 g.
There are no set rules about how many grams or yards of yarn per skein/ball of yarn. Different companies have different sized skeins/balls of yarn, and even between the different styles of yarns. Best bet would be to find the yarn that you would like to use for your project, and see how many grams in the ball then figure out how many balls you would need. A few numbers to keep in mind, 1070g = approximately 38oz, or about 2.4 pounds.
Any kind, but most knitters all agree that wool is best if you can afford it. They also stay far away from most acrylic yarn (i.e Red Heart) but their are some, like microspun. Wool feelsvery nice, and can also be felted, which acrylic cannot. ---- Alpaca is great yarn too. and if you're talking brands that are cheap but nice i suggest "Caron Simply Soft" it is cheap, you can buy it anywhere, even walmart. It's acrylic but it is very soft and good for everyday projects.
There isn't a way to figure out how many skeins of worsted yarn would equal 18 oz. You would need to look at the yarn, and see how many ounces are in that particular skein and go from there.The word "weight" in yarn refers to the size or thicknessof the strand of yarn, not an actual ounce, pound, gram or kilogram. Then the size or thickness would be measured by how many stitches are in 4 inches. The Yarn Council of America has a guideline for "weight" measurement for yarns.The reason there are variables in the actual skein ounces, grams weight, is that different fibers of the same length would weigh differently--some are lighter or heavier than others.