Estimate your baby's arrival with our Pregnancy Due Date Calculator. Simply enter your last period or conception date to track your journey, calculate trimesters, and prepare for your new family member.
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Discovering you are pregnant is one of life's most exciting milestones. Naturally, the first question on every parent's mind is: "When will the baby arrive?" Our Pregnancy Due Date Calculator uses medically recognized formulas to provide you with a reliable estimate of your baby's birth date.
Most healthcare providers calculate pregnancy based on a 40-week timeline starting from the first day of your last menstrual period (LMP). This is because the exact moment of conception is often difficult to pinpoint. However, if you happen to know the exact date of conception—perhaps through tracking or IVF—our tool can calculate based on that 266-day window as well.
When you use the calculator, you'll receive several pieces of information. The Estimated Due Date (EDD) is the target. The "Weeks and Days" result tells you your current gestational age. This is the number doctors use to track development milestones.
It is important to remember that a due date is an estimate, not a deadline. Factors such as maternal health, fetal development, and even the accuracy of your cycle tracking can influence the actual birth date. If you're also managing your health during this time, you might find our Online Timer useful for tracking exercise or meditation sessions.
Once you have your estimated date, it's time to start planning! Schedule your first prenatal appointment, start a pregnancy journal, and begin thinking about your birth plan. Knowing your due date helps you prepare for each trimester's unique changes and ensures you're ready when that special day finally arrives.
The due date is an estimate. Only about 4-5% of babies arrive on their actual due date. Most babies are born between 37 and 42 weeks of pregnancy. The calculator provides a helpful baseline for planning and medical tracking.
If your periods are irregular, the LMP method might be less accurate. You can adjust the cycle length in our calculator to your average, but an early dating ultrasound (usually performed between 8 and 14 weeks) is the most accurate way to determine your due date in this case.
The second trimester typically begins at week 13 of pregnancy and lasts until the end of week 27. The third trimester begins at week 28 and lasts until birth.