Pregnancy Calculator
Calculate your due date, current pregnancy week, trimester, and important milestones throughout your pregnancy journey.
📖 How to Use
Enter the first day of your last menstrual period (LMP) and the calculator will estimate your due date, current week of pregnancy, and show you important milestones. You can also calculate based on your conception date if you know it.
Understanding Your Results
Due Date
Estimated date of delivery, typically 40 weeks from your LMP.
Current Week
How far along you are in your pregnancy journey.
Trimester
Pregnancies are divided into three trimesters of about 13 weeks each.
Days Remaining
Countdown to your estimated due date.
Pregnancy Trimesters
First Trimester
The first trimester begins on the first day of your last period. During this time, major organs begin to form and the baby's heart starts beating around week 6.
Second Trimester
Often called the "golden period" of pregnancy. You may start feeling baby movements around weeks 18-22. The baby grows significantly during this time.
Third Trimester
The final stretch! The baby continues growing and developing, preparing for birth. You may experience more frequent doctor visits during this period.
Frequently Asked Questions
❓How accurate is the due date?
Only about 5% of babies are born on their exact due date. Most babies arrive within two weeks before or after the estimated date. Your healthcare provider may adjust the date based on ultrasound measurements.
❓What if I don't know my LMP?
If you know your conception date, you can use that instead. Add 266 days (38 weeks) to the conception date to estimate your due date. An early ultrasound can also help determine gestational age.