How to help your child gain weight
There could be several reasons your child or a child you care for is underweight. If it's because they're not getting enough calories there are things you can do to help.
It's important children get the right amount of calories, nutrients and minerals to support healthy growth.
The good news is that you can help them get more calories by making changes to what they eat and drink and encouraging healthy habits.
This information is for children aged 2 years old and over. If your child is under 2 years old, read about weaning and feeding.
Check if your child is underweight
It can be difficult to know if your child is underweight. Growth spurts, illness and changes to their routine can have a big impact on their weight.
A good place to start is by calculating their body mass index (BMI).
Your child's result will be given as a centile (or percentile) and shows if they're a healthy weight for their gender, height and age.
You'll need to know their date of birth, height, weight and when you measured them.
Tips to help your child gain weight
Further information
Over 100 child-friendly recipes
These recipes are nutritionally balanced and not specifically created for weight gain but you might find a new family favourite.
Visit the NHS Healthier Families website
The Eatwell Guide
Children from the age of 2 years old should start to follow the Eatwell Guide for a healthy, balanced diet.
Understanding fat
Fat is an essential part of a balanced diet. Find out how much is recommended and the difference between saturated and unsaturated fat.
Exercise guidelines
Like adults, children should try to reach a certain amount of daily, or weekly activity. Guidelines are different for each age group.
Page last reviewed: 28 March 2023
Next review due: 28 March 2026