BMI Calculator
This BMI calculator gives your body mass index, the standard classification and, for pregnancy, the total weight gain range that is commonly used as reference for a single baby.
The numbers are a conversation starter, not a diagnosis. Twins, swelling and medical conditions all change the picture, so the reading that matters is the one made with your prenatal team.
General reference for a single baby. Your prenatal team does the follow up.
How to use it
- Type your current weight and height.
- Add your pre-pregnancy weight to see the reference gain range.
- Use the result as a starting point for your next appointment.
Frequently asked questions
Is fast weight gain always a problem?
It can indicate fluid retention and is worth mentioning at your visit, but only a clinical evaluation can tell.
Does BMI work for children?
No. Children are assessed with growth curves by age and sex, not adult BMI ranges.
Should I diet during pregnancy?
Restricting food without professional guidance is not recommended in pregnancy.
This content is informational and does not replace medical care.