Recommended weight gain (one baby)
| Pre-pregnancy BMI | Total gain | Per week (2nd & 3rd trimester) |
|---|---|---|
| Underweight (below 18.5) | 12.5 – 18 kg | 0.44 – 0.58 kg |
| Normal (18.5 – 24.9) | 11.5 – 16 kg | 0.35 – 0.50 kg |
| Overweight (25 – 29.9) | 7 – 11.5 kg | 0.23 – 0.33 kg |
| Obese (30 and above) | 5 – 9 kg | 0.17 – 0.27 kg |
Most women gain only 0.5–2 kg in the first trimester.
Twins
| Pre-pregnancy BMI | Total gain (twins, provisional) |
|---|---|
| Normal | 17 – 25 kg |
| Overweight | 14 – 23 kg |
| Obese | 11 – 19 kg |
Eating well in pregnancy
- You do not need to ‘eat for two’. Extra needs are about 350 kcal a day in the second trimester and 450 kcal in the third.
- Include protein, iron and calcium rich foods: dal, green leafy vegetables, milk, curd, eggs and fruit.
- Take the folic acid, iron and calcium supplements your doctor prescribes.
Frequently asked questions
How much weight should I gain in the first trimester?
About 0.5–2 kg in total. Morning sickness may mean little or no gain, which is usually fine.
Is it bad to gain too much weight in pregnancy?
Gaining much more than advised raises the risk of gestational diabetes, high blood pressure and a difficult delivery.
Do these guidelines apply to Indian women?
They are the most widely used international guidelines. Your obstetrician may set a personal target.
Sources
- Institute of Medicine and National Research Council. Weight Gain During Pregnancy: Reexamining the Guidelines, 2009. Link
Medical disclaimer: This calculator gives estimates for general information only. It is not a diagnosis or a substitute for advice from a doctor or registered dietitian. Please consult a healthcare professional before making changes to your diet, exercise or medicines, especially if you are pregnant, have a medical condition or take regular medication.
Last updated: 20 October 2026. Read our editorial policy.
