Discover your baby's estimated due date with our simple calculator. Enter the first day of your last menstrual period (LMP) to get an important date for your pregnancy journey.
Your Estimated Due Date (EDD), often just called a due date, is the predicted day your baby will be born. The most common and reliable way to calculate this is by using the first day of your last menstrual period (LMP). A full-term pregnancy is considered to be **280 days (or 40 weeks)** from your LMP. This date is essential for you and your healthcare provider to track your pregnancy milestones.
While it's exciting to have a date to look forward to, it's crucial to remember that your EDD is just an approximation. Here are a few key facts to keep in mind:
Think of your EDD as a guide for your final weeks of pregnancy, but know that your baby will ultimately set their own birthday!
Disclaimer: This calculator provides an estimate and is not a substitute for professional medical advice. Always consult with your doctor or midwife for accurate dating and prenatal care.
Maintained by Live Fitness Check. Last updated: August 9, 2026. How we test our calculators .
Estimates a pregnancy due date from the first day of the last menstrual period.
The calculator applies the conventional 280-day pregnancy-dating interval from the first day of the last menstrual period. The calculation uses the first day of the last menstrual period.
Cycle length, uncertain dates and ultrasound findings can change the best obstetric estimate. Use the number as an estimate and consider professional advice when the result may affect health, treatment, pregnancy, nutrition, exercise safety or another important decision.
