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
ft
in
lbs
lbs
wks
Your results
Total weight gained
10 lbs
good
- Pre-pregnancy BMI
- 23.3 (Healthy weight)
- Recommended total gain
- 25.4 35.3 lbs
- Expected at week 20
- 9 11.6 lbs
Healthy Weight Gain by BMI Category
- •Underweight (BMI <18.5) 28–40 lb (12.5–18 kg) total.
- •Healthy (BMI 18.5–24.9) 25–35 lb (11.5–16 kg) total.
- •Overweight (BMI 25–29.9) 15–25 lb (7–11.5 kg) total.
- •Obese (BMI ≥30) 11–20 lb (5–9 kg) total.
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Frequently Asked Questions
What if I'm carrying twins?
Recommended gain is roughly 37–55 lb (17–25 kg) for twin pregnancies, depending on pre-pregnancy BMI.