Baby Weight-for-Age Calculator
Check if your baby's weight is appropriate for their age using WHO weight-for-age growth standards.
How It Works
Enter your baby's age in months, weight, and sex. The calculator compares the weight to WHO growth standards and indicates whether the weight is below average, average, above average, or requires attention.
Formula
Weight Status = Compare to WHO median ± 2 standard deviations
Frequently Asked Questions
How much should a baby weigh at each month?
Average birth weight is 3.3 kg. Babies typically double birth weight by 5 months and triple it by 12 months. Individual variation is normal within the healthy range.
What is a healthy weight gain for babies?
In the first 3 months, babies gain about 150-200g per week. From 3-6 months, gain slows to 100-150g per week. After 6 months, about 70-90g per week is typical.