Pre-Pregnancy BMI
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Recommended Total Gain
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General population guideline (IOM 2009). Twin pregnancies and individual medical factors change the recommended range — follow your provider's specific guidance.
Free Pregnancy Weight Gain Calculator
See the recommended weight gain range for your pre-pregnancy BMI, per IOM guidelines.
The IOM ranges exist because both too little and too much gestational weight gain carry risks. These are general population guidelines — twin pregnancies and individual medical circumstances change the recommended range, so always follow your provider's specific guidance over this general estimate.
Frequently Asked Questions
Are these guidelines the same for twins?
No — twin pregnancies have different, generally higher, recommended gain ranges. Ask your provider for guidance specific to your pregnancy.