Calculate recommended total and trimester-by-trimester weight gain during pregnancy based on your pre-pregnancy BMI and RANZCOG guidelines.
| Trimester | Recommended gain |
|---|
The Royal Australian and New Zealand College of Obstetricians and Gynaecologists (RANZCOG) recommends weight gain based on pre-pregnancy BMI:
| Pre-pregnancy BMI | Singleton | Twins |
|---|---|---|
| Underweight (<18.5) | 12.5–18 kg | 17–25 kg |
| Normal (18.5–24.9) | 11.5–16 kg | 17–25 kg |
| Overweight (25–29.9) | 7–11.5 kg | 14–23 kg |
| Obese (≥30) | 5–9 kg | 11–19 kg |