GO TO: http://www.metric-conversions.org/conversion-calculators.htm
I have found that not all metric conversion calculators posted on the internet are accurate. I checked this one and it appears to be ok. This one is a pain to use because you have to reset it every time, by reclicking the WEIGHT CONVERSIONS ICON to calculate a new number.
If you find an easier-to-use (while still accurate) calculator, please let me know.
Recipe ingredients are listed by weight in grams. You want to convert it to weight in ounces if in the United States.
Round up to two decimal places if using one or two times the recipe. For example: if the result is 1.267 ounces, use as 1.27 ounces
For three times the recipe or more, I carry the result to three decimal places – example: if the result is 1.267 ounces, use 1.267 ounces
NOTE:
Cups measurements are volume. Grams and pounds/ounces are weights. Fluid ounces (mL) are volume measurements. Fluid ounces and ounces are not the same.
If the recipe indicates:
one 6-ounce container yogurt is weighed. (Same with cream cheese – when a recipe indicates one 8-ounce package cream cheese, it means the weight.) Look at your yogurt or sour cream container. It indicates net weight in ounces or (grams) on the outside of the container. That means that the contents inside are weighed, not measured with a measuring cup. But, you can weigh 6-ounces of yogurt and then measure it with a dry measuring cup to figure out how much volume it equals.
The reason you should not measure yogurt and sour cream in a liquid measuring cup is because you cannot get the top of the ingredient level enough to read an accurate measurement at eye level. That is the theory. True liquids, such as water, will bow slightly – will drop in the middle and then the edge of the liquid will rise slightly, which aligns exactly with the lines on the liquid measuring cup to give you an accurate measurement when read at eye levl! It's the nature of liquids.
Fluid ounces are measured in a liquid measuring cup. That is reserved for liquids such as milk, buttermilk, heavy cream and other liquids. Look in your fridge at a milk container. It will indicate volume in quarts, gallons or by metric volume in milliliters or mL or fractions thereof. (Milligrams is a measure of weight.) Water and liquids can be weighed, and are expressed in ounces or grams (metric).
1/2 cup whole milk yogurt, weighs 4.25 ounces or 121 grams! So, 6-ounces would be about 2/3 cup. (1 cup = 8.5 ounces. 1/3 of that = 2.83 x 2 = 5.66 ounces)
If you measured 6 ounces of yogurt directly in a liquid measuring cup 6 fl oz(US) = 0.750000 cup(US) or 3/4 cup.