Calcium Needs Calculator
The calcium reference is higher in adolescence, 1000 mg for most adults, and 1200 mg for older women and men over 70.
Result
Enter the values and press Calculate. Numbers outside the allowed range produce no result.
How is it calculated?
Milk, yogurt, cheese and fortified drinks are the main sources. Count food and supplements together.
Age and sex select the IOM calcium RDA
Reference table
| Age | RDA |
|---|---|
| 14–18 | 1300 mg |
| 19–50 | 1000 mg |
| Women 51+ | 1200 mg |
| Men 71+ | 1200 mg |
How should you read the result?
The adult tolerable upper level is 2500 mg for most groups. Kidney-stone history needs a personal plan. This page does not dose bone medicines.
Frequently asked questions
How many mg of calcium per day?
1000 mg from 19 to 50. 1200 mg for women over 50 and men over 70.
Can I get calcium without milk?
Yogurt, cheese, calcium-set tofu, almonds and fortified drinks contribute. Use the milligrams on the label.
Is too much calcium harmful?
Above the upper level, especially from supplements, has been linked to kidney stones. Prefer food first.
Is vitamin D separate?
Yes. It plays a role in calcium absorption, but this tool does not set a vitamin D dose.