Estimate a recommended total pregnancy weight-gain range from your pre-pregnancy BMI and see a typical range for the current week, based on IOM-style categories. This is an approximate reference, not medical advice; for any health concern or emergency, contact your pediatrician or emergency services, and follow WHO, CDC or your local health authority guidance.
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How to Use the Pregnancy Weight Gain Tool
Enter your pre-pregnancy weight and height and your current week, then press Show Gain Range. The tool works out your pre-pregnancy BMI, the category it falls in and the recommended gain.
Reading the result
Pre-pregnancy BMI sets the category: underweight, normal, overweight or obese.
The total range is the recommended gain across the whole pregnancy.
The by-week range is a typical figure for where you are now.
The first trimester usually accounts for only a small part of the total gain.
Features
Pre-pregnancy BMI and IOM-style category
Recommended total gain range and a typical range for the current week
Bundled reference values, no download needed
This is an approximate reference, not medical advice; for any health concern or emergency, contact your pediatrician or emergency services, and follow WHO, CDC or your local health authority guidance.
All processing runs locally in your browser. Your data is not uploaded to any server.
Twins and other situations use different targets. Always follow the range your own provider recommends for you.