Track your healthy weight gain during pregnancy with our free calculator based on IOM guidelines. Get personalized weekly, monthly, and total weight targets for you and your baby.
Enter your pre-pregnancy details below for accurate results
Your ideal pregnancy weight gain depends on your pre-pregnancy BMI. Below are the official recommendations for single and twin pregnancies.
| BMI Category | Total Weight Gain (Single) | Total Weight Gain (Twins) |
|---|---|---|
| Underweight (<18.5) | 12.5 – 18 kg | 16 – 24 kg |
| Normal (18.5–24.9) | 11.5 – 16 kg | 16 – 20 kg |
| Overweight (25–29.9) | 7 – 11.5 kg | 13 – 18 kg |
| Obese (≥30) | 5 – 9 kg | 11 – 16 kg |
Most women worry about weight gain during pregnancy, but it’s important to understand how the weight is distributed for a healthy baby.
Typical breakdown: Baby (3–3.5kg), placenta (0.7kg), amniotic fluid (0.8kg), uterus (0.9kg), breast tissue (1–1.4kg), blood volume (1.5kg), fluid retention (1.5–3kg), fat stores (2.5–4kg).
Normal BMI: 0.42kg/week in 2nd/3rd trimester. Underweight: 0.5kg/week. Overweight: 0.28kg/week. Obese: 0.22kg/week.
No. You should never diet or intentionally lose weight during pregnancy. Focus on nutrient-dense foods.
No. You only need 300 extra calories per day in the second and third trimesters.
Most weight gain happens between weeks 12–32. Growth slows in the final month.