Paediatric Weight Estimation
Paediatric Weight Estimation
Age group
Enter age to see estimated weight.
Useful to know
- • Babies lose up to 10% of birth weight in the first 7–10 days.
- • Birth weight is regained by the second week.
- • Weight gain in the first 3 months: ~25 g/day.
- • Birth weight doubles by 5 months, triples by 1 year.
Show formula
Infant (0–12 months): (Age in months × 0.5) + 4 kg
Child (1–10 years): (Age in years + 4) × 2 kg