The Pregnancy Weight Gain Calculator helps expectant mothers track their healthy weight gain throughout pregnancy. By entering your pre-pregnancy weight, height, current weight, and pregnancy week, this tool calculates your Body Mass Index (BMI) and provides the recommended total and weekly weight gain range according to IOM/ACOG guidelines. It supports both metric and imperial units and adjusts recommendations for single or twin pregnancies. This calculator is simple, mobile-friendly, and can easily be added to any WordPress website. It is designed to give expectant mothers an easy way to monitor progress and stay within a healthy range — but it should be used for informational purposes only. Always consult your doctor or midwife for personalized medical advice.