Pregnancy Weight Gain Calculator
Estimate the recommended amount of weight gain during pregnancy based on your pre-pregnancy BMI and current pregnancy weight.
Calculate pregnancy weight gain
Enter your pre-pregnancy height and weight, current pregnancy weight, and pregnancy week to compare your progress with recommended weight-gain ranges.
Your result
—
| Pre-pregnancy BMI | — |
| BMI category | — |
| Current pregnancy weight | — |
| Weight gained so far | — |
| Recommended total gain | — |
| Pregnancy week | — |
Step-by-step calculation
What does the result mean?
Recommended pregnancy weight gain depends on your pre-pregnancy BMI. For a pregnancy with one baby, the CDC lists different total weight-gain ranges for underweight, healthy-weight, overweight, and obesity categories. :contentReference[oaicite:1]{index=1}
For a singleton pregnancy, the recommended total gain is 28–40 pounds for underweight, 25–35 pounds for healthy weight, 15–25 pounds for overweight, and 11–20 pounds for obesity. :contentReference[oaicite:2]{index=2}
Weight gain during pregnancy is individual. Your healthcare provider can help determine an appropriate goal based on your health, pregnancy, and individual circumstances.
How is pregnancy weight gain calculated?
The calculator first determines your pre-pregnancy BMI using your height and pre-pregnancy weight.
Your BMI category is then matched with the recommended total pregnancy weight-gain range for a singleton pregnancy.
Your current weight is compared with your pre-pregnancy weight to determine how much weight you have gained so far.
Pregnancy weight gain example
Suppose a person is 165 cm tall, weighed 60 kg before pregnancy, and currently weighs 66 kg.
BMI ≈ 22.0
BMI category = Healthy weight
Weight gained = 66 − 60
Weight gained = 6 kg
A pre-pregnancy BMI in the healthy-weight range has a recommended total pregnancy weight gain of 25–35 pounds (approximately 11.3–15.9 kg) for a singleton pregnancy. :contentReference[oaicite:3]{index=3}
Formula used
Weight gained = current pregnancy weight − pre-pregnancy weight
The recommended pregnancy weight-gain ranges used by this calculator are based on CDC guidance derived from the National Academies/IOM recommendations for singleton pregnancies. :contentReference[oaicite:4]{index=4}
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Important: This calculator is for general informational purposes and is designed for singleton pregnancies. It does not replace individualized medical advice. Pregnancy weight-gain goals can vary based on your health, pregnancy, and other factors. If you are pregnant, discuss your weight-gain goals and progress with your healthcare provider. The CDC recommends working with a healthcare provider on pregnancy weight-gain goals. :contentReference[oaicite:5]{index=5}