Pregnancy Calculator & Due Date Estimator | Track Your Baby’s Development

Pregnancy Calculator & Due Date Estimator

Calculate your due date, track pregnancy progress, and get personalized information about your baby’s development

Enter your information to calculate your due date and pregnancy timeline.

Your due date will appear here

Understanding Your Pregnancy Timeline

Our pregnancy calculator provides accurate due date estimation based on established medical calculations. The most common method uses the first day of your last menstrual period (LMP) to estimate when your baby will arrive. A typical pregnancy lasts about 40 weeks from the first day of your last period.

Key Pregnancy Milestones

Throughout your pregnancy journey, you’ll experience several important milestones:

  • First Trimester (Weeks 1-13): Early development, morning sickness, and initial prenatal visits
  • Second Trimester (Weeks 14-27): Baby’s movements become noticeable, anatomy scan ultrasound
  • Third Trimester (Weeks 28-40+): Final growth phase, preparation for labor and delivery

Factors That Can Affect Your Due Date

While our calculator provides a reliable estimate, several factors can influence your actual delivery date:

  • Irregular menstrual cycles
  • First pregnancy vs. subsequent pregnancies
  • Multiple gestation (twins, triplets)
  • Maternal age and health conditions
  • Genetic factors

Frequently Asked Questions

How accurate is the pregnancy due date calculator?
Our pregnancy calculator provides an estimated due date based on standard medical calculations. While it’s highly accurate for women with regular 28-day cycles, individual variations can affect the actual delivery date. Only about 5% of babies are born exactly on their due date.
What’s the difference between gestational age and fetal age?
Gestational age is measured from the first day of your last menstrual period (LMP), while fetal age (also called embryonic age) is measured from the actual conception date. Gestational age is typically about two weeks longer than fetal age.
Can I use this calculator if I have irregular periods?
Yes, our calculator allows you to adjust for cycle length. If your cycles are consistently longer or shorter than 28 days, input your average cycle length for a more accurate due date estimation.
How does IVF affect due date calculation?
For IVF pregnancies, we calculate the due date based on the embryo transfer date. For a 3-day embryo transfer, we add 263 days, and for a 5-day transfer, we add 261 days to determine the estimated due date.
What if I don’t know the date of my last period?
If you’re unsure about your LMP, you can use our calculator with conception date, ultrasound date, or IVF transfer date options for an accurate due date estimation.

Conclusion

Our comprehensive pregnancy calculator provides expecting parents with valuable insights into their pregnancy journey. By accurately estimating your due date and tracking fetal development week by week, you can better prepare for your baby’s arrival. Remember that while due date calculators are helpful tools, they provide estimates rather than guarantees. Always consult with your healthcare provider for personalized medical advice throughout your pregnancy.

Whether you’re in early pregnancy or approaching your due date, understanding your pregnancy timeline helps you make informed decisions and enjoy this special time. From calculating conception dates to tracking trimesters, our tool offers the comprehensive information you need during this exciting journey to parenthood.