Estimate Your Baby's Arrival
Our pregnancy due date calculator helps you predict your baby's arrival date based on your last menstrual period.
Pregnancy Due Date Calculator
Understanding Your Due Date
A pregnancy due date calculator is a simple tool that helps expectant parents estimate when their baby will be born. The calculation is typically based on the first day of your last menstrual period (LMP). While it's just an estimate, knowing your due date is important for monitoring your baby's growth and planning for the arrival.
How Does the Calculator Work?
Most pregnancies last around 40 weeks (or 280 days) from the first day of the LMP. Our calculator uses this information to predict your due date. Simply enter the date of your last period, and the calculator will do the rest. This method is known as Naegele's rule and is widely used by healthcare professionals.
Can My Due Date Change?
Yes, your due date can change. The initial estimate is based on your LMP, but an early ultrasound can provide a more accurate date. Ultrasounds are especially helpful if you have irregular periods or are unsure of your LMP date. Your doctor or midwife will use this information to give you the most accurate due date possible.
Frequently Asked Questions
A due date calculator provides an estimate based on your last menstrual period (LMP). While it's a good starting point, only about 5% of babies are born on their exact due date. An early ultrasound is the most accurate way to determine your baby's gestational age.
If you have irregular periods, a due date calculator based on LMP may be less accurate. In this case, an early ultrasound is often used to determine a more precise due date. It's best to consult with your healthcare provider.
Your estimated due date is a key factor in scheduling a planned C-section. Typically, a scheduled C-section is performed in the 39th week of pregnancy. Your doctor will discuss the best timing with you based on your health and the baby's development.