Pregnancy Calculator & Due Date Estimator
Calculate from Due Date
Understanding Your Pregnancy Timeline
Our pregnancy calculator helps you estimate your due date and track your pregnancy week by week. Whether you’re calculating from your last menstrual period, conception date, IVF transfer, or ultrasound data, this tool provides accurate estimates to help you plan for your baby’s arrival.
How Does the Pregnancy Calculator Work?
The calculator uses established medical guidelines to estimate your due date and pregnancy milestones:
- Last Menstrual Period (LMP): Pregnancy typically lasts about 40 weeks from the first day of your last period. This is known as Naegele’s rule.
- Conception Date: If you know your conception date, we add 266 days (38 weeks) to estimate your due date.
- Ultrasound Dating: Early ultrasounds (especially first trimester) provide the most accurate due date estimation.
- IVF Transfer: For IVF pregnancies, we calculate based on the embryo transfer date and development stage.
Key Pregnancy Milestones
First Trimester
Weeks 1-12: Baby’s major organs begin developing. Morning sickness common.
Second Trimester
Weeks 13-27: Baby’s movements become noticeable. Most comfortable period.
Third Trimester
Weeks 28-40: Rapid growth and development. Preparation for birth.
Important Notes About Due Dates
Only about 5% of women deliver on their exact due date. Most babies are born within two weeks before or after the estimated due date. Your healthcare provider may adjust your due date based on ultrasound measurements and other factors.
Pregnancy Health Tips
- Take prenatal vitamins with folic acid
- Attend all scheduled prenatal appointments
- Maintain a balanced diet and stay hydrated
- Get moderate exercise as approved by your doctor
- Avoid alcohol, tobacco, and unnecessary medications
When to Contact Your Healthcare Provider
Seek medical attention if you experience severe abdominal pain, vaginal bleeding, sudden swelling, severe headaches, or decreased fetal movement. Always consult with your doctor about any concerns during your pregnancy.