Body Mass Index (BMI) is a common measurement used to assess body weight relative to height. During pregnancy, tracking BMI can help healthcare providers monitor healthy weight gain and reduce risks for both mother and baby.

What is BMI and Why is it Important in Pregnancy?

BMI is calculated by dividing your weight in kilograms by your height in meters squared (kg/m²). It helps categorize weight as underweight, normal, overweight, or obese. In pregnancy, knowing your pre-pregnancy BMI helps doctors recommend appropriate weight gain ranges to support a healthy pregnancy.

Healthy weight gain varies depending on your BMI before pregnancy:

• Underweight (BMI < 18.5) — gain 28-40 lbs (12.5-18 kg)
• Normal weight (BMI 18.5-24.9) — gain 25-35 lbs (11.5-16 kg)
• Overweight (BMI 25-29.9) — gain 15-25 lbs (7-11.5 kg)
• Obese (BMI 30 or more) — gain 11-20 lbs (5-9 kg)

Maintaining a healthy BMI and weight gain can lower the risk of complications such as gestational diabetes, high blood pressure, preeclampsia, and delivery complications.

How to Use a Pregnancy BMI Calculator?

1. Enter your pre-pregnancy weight and your height.
2. The calculator will provide your BMI category.
3. Based on your BMI, it will suggest a recommended weight gain range during pregnancy.

Important Notes

• Don’t rely solely on BMI during pregnancy. Weight gain patterns vary individually.
• Always consult your healthcare provider to personalize your weight and nutrition goals.
• Tracking weight gain alongside BMI helps ensure healthy fetal development and maternal health.

When to Use a Pregnancy BMI Calculator?

• Before conception to understand your baseline weight category.
• Early in pregnancy to set healthy weight gain targets.
• During prenatal visits to monitor progress.