Average Weight for a 3-Year-Old Girl

The average (50th-percentile) weight for a 3-year-old girl (36 months) is 13.9 kg (30.5 lb), based on the WHO Child Growth Standards. Across the healthy range, most girls this age weigh between 11.0 kg (24.2 lb) and 17.8 kg (39.3 lb).

What's typical at this age

Preschoolers typically gain around 2 kg a year. Picky eating often peaks around this age and almost always eases with time; offering variety without pressure works better than coaxing. Between 3 and 3½ years, the median girl gains roughly 1.1 kg.

A percentile compares your girl to other girls the same age — the 50th is simply the middle. Being above or below it is usually completely normal; a child who has always tracked the 15th or 85th percentile is typically growing exactly as they should. What pediatricians watch for is a sudden change in the pattern, not the number itself.

Percentiles calculated from the WHO Child Growth Standards (2006). For information only — not medical advice. If you're concerned about your child's growth, speak to your pediatrician or health visitor. Full disclaimer.