Weight and height of an infant

Online calculator for calculating the norm of a child's weight and height by their age.

Infant's weight
In the first days of life, a child's weight slightly decreases but then recovers. In infancy, the child gains weight very intensively, doubling by 6 months and tripling by a year. From birth to 6 months, the monthly weight gain is 700 grams. From 6 months to 1 year, the monthly gain is 600 grams.

Infant's height
The monthly height gain of a child from birth to 3 months is 3 cm. From 3 months to 6 months, the child gains 2.5 cm each month. From 6 months to 9 months, the monthly gain is 1.5 cm. From 9 months to a year, the child gains 1 cm monthly.