Most food labels list calcium as a % of daily value (DV), rather than in milligrams (mg). They use a base daily value recommendation of 1,000 mg, so to find out how many milligrams of calcium are contained in a serving, add a 0 to the % DV, for example 10% DV becomes 100 mg of calcium.

Age Group
 1997 Adequate Intake
Values* (mg)
Birth to 6 months
 210
6-12 months
 270
1-3 years
 500
4-8 years
 800
9-13 years
 1300
14-18 years
 1300
Pregnant or lactating teens
 1300

*Recommendations based on the Dietary Reference Intakes for Calcium, National Academy of Sciences, 1997. (Source: Milk Matters Website)