How to Calculate Weeks Pregnant by Due Date
P regnancy can be an exciting time, but it can also be a bit overwhelming, especially if you're a first-time mom. One of the things you may be wondering is how to calculate your weeks pregnant. There are two main ways to do this: by your last menstrual period (LMP) or by your ultrasound due date. Pregnancy Week Calculator Calculating Weeks Pregnant by LMP This is the most common way to calculate your weeks pregnant, and it's based on the fact that most pregnancies last about 40 weeks from the first day of your last period. To calculate your weeks pregnant by LMP, add 280 days (or 40 weeks) to the first day of your last period. For example, if the first day of your last period was January 1, 2023, your estimated due date would be October 8, 2023. This means that you would be 40 weeks pregnant on October 8, 2023. Calculating Weeks Pregnant by Ultrasound Due Date If you have an ultrasound during your pregnancy, your doctor will be able to give you a more accurate due
