Pregnancy Weight Gain Calculator
Track your healthy weight gain during pregnancy with our calculator based on your pre-pregnancy BMI and trimester.
Pregnancy Information
Calculating your pregnancy weight gain information…
Your Pregnancy Weight Gain Results
Weekly Weight Gain Tracker
This table shows the recommended weight gain range for each week of your pregnancy based on your BMI category.
| Trimester | Weeks | Underweight (<18.5) | Normal Weight (18.5-24.9) | Overweight (25-29.9) | Obese (≥30) |
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Healthy Weight Gain Tips
Frequently Asked Questions
The amount of weight you should gain during pregnancy depends on your pre-pregnancy BMI. For women with a normal BMI (18.5-24.9), the recommended weight gain is 25-35 pounds. Underweight women (BMI <18.5) should gain 28-40 pounds, overweight women (BMI 25-29.9) should gain 15-25 pounds, and obese women (BMI ≥30) should gain 11-20 pounds. If you're carrying twins, you'll need to gain more weight: 37-54 pounds for normal weight, 31-50 pounds for overweight, and 25-42 pounds for obese women.
Most women don’t need to gain much weight in the first trimester (about 1-4 pounds total). Weight gain should be gradual, with about 1 pound per week in the second and third trimesters for normal weight women. Underweight women may need to gain slightly more (about 1.3 pounds per week), while overweight and obese women should gain less (about 0.6 pounds per week). Your healthcare provider can give you personalized recommendations based on your specific situation.
Gaining too much weight during pregnancy increases your risk of gestational diabetes, high blood pressure, complications during delivery, and having a baby with a high birth weight. It also makes it harder to lose weight after delivery. Gaining too little weight increases the risk of having a premature baby or a baby with low birth weight. Both extremes can affect your baby’s long-term health. If you’re concerned about your weight gain, talk to your healthcare provider for personalized advice.
Pregnancy weight gain is distributed among several components. For a woman with a healthy weight gain of 30 pounds, approximately: 7-8 pounds is the baby, 4-5 pounds is increased blood volume, 2-3 pounds is amniotic fluid, 2-3 pounds is breast tissue, 2-3 pounds is uterine enlargement, 4 pounds is maternal fat stores, and 2-3 pounds is placenta. The remaining weight is due to increased fluid retention. This distribution can vary based on individual factors and the number of babies you’re carrying.
After pregnancy, it’s important to give your body time to recover before trying to lose weight. Wait until your postpartum check-up (usually 6 weeks after delivery) to get clearance from your healthcare provider. When you’re ready, aim for gradual weight loss of about 1 pound per week through a combination of healthy eating and moderate exercise. Breastfeeding can help with weight loss as it burns extra calories. Remember that it took 9 months to gain the weight, so it’s reasonable to take at least that long to lose it. Be patient with your body and focus on nourishing yourself, especially if you’re breastfeeding.