Pregnancy Weight Gain Calculator
Find your recommended pregnancy weight gain range based on pre-pregnancy BMI and current gestational week.
Weight Gain Recommendations
What is a Pregnancy Weight Gain Calculator?
This calculator uses pre-pregnancy BMI and current gestational week to estimate recommended total weight gain and weekly gain rates based on Institute of Medicine (IOM) guidelines. It helps expectant mothers track healthy gestational weight gain.
How to Use This Calculator
- Select your preferred unit system (metric or imperial).
- Enter your pre-pregnancy weight and height.
- Input your current week of pregnancy.
- Click Calculate to see your personalized recommendations.
Frequently Asked Questions
What are the IOM weight gain guidelines?
The Institute of Medicine recommends: underweight women gain 28�?0 lb, normal weight 25�?5 lb, overweight 15�?5 lb, and obese women 11�?0 lb during pregnancy.
How much weight should I gain in the first trimester?
Most women gain 1�? lb during the first trimester. Significant gain usually begins in the second trimester.
Why does pre-pregnancy BMI matter?
Pre-pregnancy BMI determines healthy gain targets. Women with lower BMI need more weight gain to support fetal development, while those with higher BMI have lower targets to reduce pregnancy complications.
What if I am gaining weight faster than recommended?
Talk to your healthcare provider. They can review your diet and activity level to ensure healthy progression without restricting necessary nutrition.