In 1993, the European Scientific Committee for Food set population reference intakes (PRI) for calcium in milligrams (mg) per day (42):

 

Age	Males: mg/day	Females: mg/day
6–12 months	400	400
1–3 years	400	400
4–6 years	450	450
7–10 years	550	550
11–14 years	1,000	800
15–17 years	1,000	800
18 years and older	700	700
Pregnant	-	700
Breast-feeding	-	1,200

In 2010, the U.S. Institute of Medicine established a recommended dietary allowance (RDA) for calcium (61): 

 

Life Stage	Age	Males: (mg/day)	Females: (mg/day)
Infants	0–6 months	200	200
Infants	6–12 months	260	260
Children	1–3 years	700	700
Children	4–8 years	1,000	1,000
Children	9–13 years	1,300	1,300
Adolescents	14–18 years	1,300	1,300
Adults	19 - 51 years	1,000	1,000
Adults	51 - 70 years	1,000	1,200
Adults	71 years and older	1,200	1,200
Pregnant and  lactating women	14 - 18 years	-	1,300
Pregnant and  lactating women	19 - 50 years	-	1,000

For a detailed overview of recommended daily intakes (PRIs/RDAs) of vitamins and minerals for adults derived from different countries and organizations see PDF.