Pregnancy Weight Gain Calculator
See recommended weight gain ranges based on your pre-pregnancy BMI and current week — using Institute of Medicine guidelines.
Enter your details
Your results
Total weight gained
5 kg
- Pre-pregnancy BMI
- 23.9 (Healthy weight)
- Recommended total gain
- 11.5 - 16 kg
- Expected at week 20
- 4.1 - 5.3 kg
Healthy Weight Gain by BMI Category
- •Underweight (BMI <18.5) — 12.5 to 18 kg total.
- •Healthy (BMI 18.5-24.9) — 11.5 to 16 kg total.
- •Overweight (BMI 25-29.9) — 7 to 11.5 kg total.
- •Obese (BMI ≥30) — 5 to 9 kg total.
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Frequently Asked Questions
What if I'm carrying twins?
Recommended gain is roughly 17-25 kg for twin pregnancies, depending on pre-pregnancy BMI.