Pregnancy Weight Gain Calculator
Check the recommended weight gain range for your pregnancy, based on your pre-pregnancy BMI.
Your pre-pregnancy BMI category
Recommended total weight gain
This calculator provides a general estimate for informational purposes only. It is not a medical device and does not provide medical advice or diagnosis. Always consult a qualified healthcare professional about your individual health circumstances.
Frequently Asked Questions
How is the recommended range calculated?
It's based on the U.S. Institute of Medicine (IOM) 2009 guidelines, which recommend a total weight gain range depending on your pre-pregnancy BMI category and whether you're expecting one baby or twins.
Why is there no result for underweight twin pregnancies?
The IOM guidelines don't include an established weight gain range for underweight women carrying twins — talk to your doctor or midwife for personalised guidance in this case.
Is this the same for every pregnancy?
No — this is a general guideline. Your healthcare provider may recommend a different target based on your individual health, medical history and how your pregnancy is progressing.
Want lab-grade insight to go with this estimate?
Family Planning Tests
