Pregnancy Weight Gain
Calculate recommended weight gain during pregnancy
These calculators provide general information only and are not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider.
How to use Pregnancy Weight Gain
- 1Enter your pre-pregnancy weight and height to compute your starting BMI.
- 2Select the recommended gain range for your BMI category.
- 3Track your current gain against the suggested total for each trimester.
Recommended weight gain in pregnancy
Total by BMI: underweight 12.5 to 18 kg, normal 11.5 to 16 kg, overweight 7 to 11.5 kg, obese 5 to 9 kgWeight gain supports the baby, placenta, amniotic fluid, and maternal tissue stores; the right amount depends mainly on starting BMI.
Gaining too little or too much is linked to delivery and infant-health risks, so ranges are guidance, not strict rules, and your clinician individualizes them.
Frequently asked questions
What if I am expecting twins?
Recommended totals are higher for multiples; follow your provider's specific schedule.
Can I diet to lose weight while pregnant?
Pregnancy is not the time for weight-loss dieting; focus on steady, adequate gain with good nutrition.
Why does BMI at the start matter?
It sets the safest gain band because risk patterns differ by starting weight.