Pregnancy Weight Gain Calculator
Estimate your pregnancy weight-gain range from pre-pregnancy BMI, current week, current weight and singleton or twin pregnancy using CDC/IOM-style guidance.
How pregnancy weight-gain ranges are estimated
English search results for pregnancy weight-gain calculators usually start with pre-pregnancy BMI, then compare current gain with a week-by-week range. The range is an estimate for discussion with a pregnancy care provider.
Pre-pregnancy BMI category determines the recommended total gain range.
Current gain is compared with the expected range for the selected pregnancy week.
CDC/IOM-style total gain ranges
| Pre-pregnancy BMI | Singleton pregnancy | Twin pregnancy |
|---|---|---|
| Underweight,.5 | 28-40 lb | 50-62 lb |
| Normal weight, BMI 18.5-24.9 | 25-35 lb | 37-54 lb |
| Overweight, BMI 25.0-29.9 | 15-25 lb | 31-50 lb |
| Obesity, | 11-20 lb | 25-42 lb |
Frequently Asked Questions
Sources and References
- Weight Gain During PregnancyCDC
- How much weight should I gain during pregnancy?ACOG
- Weight Gain During Pregnancy: Reexamining the GuidelinesInstitute of Medicine / NCBI Bookshelf
- Nutrition During PregnancyACOG
Calculations are based on the listed reference sources. Links open in a new tab.
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