Weight projection formula: 1-6 months weight (g) = birth weight + (month age × 600 g) 7-12 months weight (g) = birth weight + (month age × 500 g) 2-14 years weight (kg) = (age × 2) + 8 kg Height projection formula: 3 months growth 3-3.5 cm/month 4-6 months growth 2 cm/month 7-12 months growth 1-1.5 cm/month Height after 1 year = (age × 5) + 80 cm Growth rate reference: Infancy (under 3 years) >7 cm/year Childhood (3-10 years) <4-5 cm/year Adolescence (10-14 years) <5-6 cm/year