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Many forms of UHT milk contain sugar, however, the packaging I have does not give a specific gram content. But they do give a percentage of sugar in the ingredients section. Can I calculate the amount of grams of sugar using this example below?
1 liter of milk contains 2.8% sugar.
1 liter = 1000 grams
1000 grams x .028 = 28 grams
Therefore 28 grams of sugar per 1 liter of milk?
If 100ml of milk equals one serving, then there are 2.8 grams of sugar per serving?
Thank you.
No, that is incorrect. Liters are a measure of volume but grams are a measure of weight, so you need to convert 1 liter of milk to the weight of 1 liter of milk. (Your calculations would be correct for water, by the way.)
Milk is an organic product so some variation is going to exist, but 1 liter of whole milk weighs approximately 1031 grams.
From that point forward the rest of your calculations are correct:
1031 grams x .028 = 28.8 grams of sugar per liter of milk
If 100 ml is one serving, then each serving contains 2.88 grams of sugar.
In other words, you were low by about 1 gram.
