Due Date Calculator
Estimate your baby’s arrival date based on the first day of your last menstrual period (LMP).
Due Date Calculator – Estimate Your Baby’s Arrival Date
The Due Date Calculator is an easy-to-use pregnancy tool that helps expectant mothers estimate when their baby might arrive. By entering the first day of your last menstrual period (LMP) and your average cycle length, you can find your estimated due date in seconds.
How the Due Date Calculator Works
This calculator uses Naegele’s Rule — the most common method used by doctors and midwives to predict due dates. It assumes a 28-day menstrual cycle and adds 280 days (or 40 weeks) to the first day of your last period. If your cycle is longer or shorter, the tool automatically adjusts the calculation.
For example, if your last period started on March 1 and you have a 28-day cycle, your estimated due date will be around December 6.
Understanding Pregnancy Weeks
Pregnancy is typically divided into three trimesters:
- First Trimester (Weeks 1–13): The baby’s organs begin to form, and most women experience morning sickness and fatigue.
- Second Trimester (Weeks 14–26): This is often the most comfortable stage of pregnancy, as energy returns and the baby starts moving.
- Third Trimester (Weeks 27–40): The final stage of development — the baby gains weight and prepares for birth.
Why Your Due Date Might Change
It’s important to remember that the due date is just an estimate. Only about 5% of babies are born on their exact predicted date. Several factors can cause variations, such as:
- Irregular menstrual cycles
- Late or early ovulation
- Multiple pregnancies (twins or more)
- Medical conditions or stress
Tips for a Healthy Pregnancy
While waiting for your baby’s arrival, maintaining a healthy lifestyle is crucial:
- Eat a balanced diet rich in folic acid, calcium, and iron.
- Stay active with doctor-approved prenatal exercises.
- Get enough rest and manage stress levels.
- Avoid alcohol, tobacco, and high caffeine intake.
- Attend regular prenatal checkups for monitoring.
FAQ – Frequently Asked Questions
1. How accurate is the Due Date Calculator?
The calculator provides an estimate based on average gestation. Ultrasound scans often refine the date by measuring fetal growth.
2. What if my cycles are irregular?
The results may be less precise. Track your cycles for several months to get a more accurate prediction, or consult your healthcare provider.
3. Can stress or illness affect my due date?
Yes — physical or emotional stress can delay ovulation, slightly changing the predicted due date.
Additional Resources
For more information about pregnancy and due date tracking, check out these trusted resources:
Disclaimer: This calculator provides an estimated date based on general averages. Always consult a healthcare provider for personalized pregnancy information and guidance.