Looking after yourself and your baby

How much weight should I gain?

The weight you should aim to gain will depend on what your body mass index (BMI) was before you became pregnant. Use this tool to calculate your BMI.

Your BMI is the number used to work out your recommended amount of weight gain.

Pre-pregnancy BMI	Recommended total gain	Weekly guide in 2nd and 3rd trimester
Less than 18.5 kg/m²	12½ to 18kg	1/2 kg per week
18.5 to 24.9 kg/m²	11½ to 16kg	400g per week
25 to 29.9 kg/m²	7 to 11½ kg	Less than 300g per week
Above 30 kg/m²	5 to 9kg	Less than 300g per week

Pregnancy Weight Gain charts

You may find it easier to follow a pregnancy weight gain chart. The charts are divided in two groups:

• Pregnancy weight gain chart for BMI less than 25kg/m2
• Pregnancy weight gain chart for BMI 25kg/m2 or over.

More information: How much weight should I gain while pregnant.

In this guide:

1. Healthy eating during pregnancy
2. How much weight should I gain?
3. Food Safety in pregnancy
4. Exercise during pregnancy
5. Perineal massage
6. Medications, alcohol, and smoking during pregnancy
7. Vaccinations during pregnancy
8. Infections and precautions in pregnancy

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