How much calcium do I need per day?

It depends. According to the Institute of Medicine, the amount of calcium per day varies per age and sex:

Women 50 and younger: 1,000 mg per day

Men 70 and younger: 1,000 mg per day

Women over 50: 1,200 mg per day

Men over 70: 1,200 mg per day

Children can also benefit from calcium, and the recommended calcium intake also varies per age:

Younger than six months: 200 mg per day

6 to 12 months: 260 mg per day

1 to 3 years: 700 mg per day

4 to 8 years: 1,000 mg per day

9 to 18 years: 1,300 mg per day