Define % of RDA in terms of IU's of mg's.

We need to know what the RDA percentages mean in terms of International Units or milligrams, etc. The guidelines for the RDA of calcium and Vitamin D have just changed. I don't know how much calcium is in MyFitnessPal's "100%." And, as we know, women and men differ, the old and the young differ. Please allow us to see the % of nutrients in other terms.