Dietary Reference Intakes for Phosphorus in United States (per day)

Males	EAR	RDA	AI	UL
0-6 months	-	-	100 mg	-
7-12 months	-	-	275 mg	-
1-3 years	380 mg	460 mg	-	3000 mg
4-8 years	405 mg	500 mg	-	3000 mg
9-13 years	1055 mg	1250 mg	-	4000 mg
14-18 years	1055 mg	1250 mg	-	4000 mg
19-30 years	580 mg	700 mg	-	4000 mg
31-50 years	580 mg	700 mg	-	4000 mg
50-70 years	580 mg	700 mg	-	4000 mg
70 years and older	580 mg	700 mg	-	3000 mg

Females	EAR	RDA	AI	UL
0-6 months	-	-	100 mg	-
7-12 months	-	-	275 mg	-
1-3 years	380 mg	460 mg	-	3000 mg
4-8 years	405 mg	500 mg	-	3000 mg
9-13 years	1055 mg	1250 mg	-	4000 mg
14-18 years	1055 mg	1250 mg	-	4000 mg
19-30 years	580 mg	700 mg	-	4000 mg
31-50 years	580 mg	700 mg	-	4000 mg
50-70 years	580 mg	700 mg	-	4000 mg
70 years and older	580 mg	700 mg	-	3000 mg

Pregnancy	EAR	RDA	AI	UL
less than 18 years	1055 mg	1250 mg	-	3500 mg
19-30 years	580 mg	700 mg	-	3500 mg
31-50 years	580 mg	700 mg	-	3500 mg

Lactation	EAR	RDA	AI	UL
less than 18 years	1055 mg	1250 mg	-	4000 mg
19-30 years	580 mg	700 mg	-	4000 mg
31-50 years	580 mg	700 mg	-	4000 mg