My label only shows a percentage, like Vit D (6% DV). How do I enter that?

Type it in the %DV box next to the nutrient and we work out the amount. Small packages are allowed to print a shorter panel that gives vitamin D, calcium, iron and potassium as percentages only, with no milligram figure anywhere on the wrapper. Six percent of the 20 mcg vitamin D Daily Value is 1.2 mcg.

We also tell you how exact that is. Labels round to a whole percent, so a printed 6% came from anywhere between 5.5% and 6.4% and the real figure sits between 1.1 and 1.3 mcg. We show that range rather than pretending 1.2 is what the manufacturer printed.