Pregnancy Calculator
Calculate your due date, track your pregnancy progress, and discover important milestones. Multiple calculation methods available for accurate results.
Calculate Your Pregnancy
Your Pregnancy Results
Enter your information to calculate your pregnancy
Understanding Pregnancy Calculation
Pregnancy typically lasts about 40 weeks from the first day of your last menstrual period, or 38 weeks from conception. However, only about 4% of babies are born on their exact due date, with 60% born within a week and 90% within two weeks of the due date.
Calculation Methods
Last Menstrual Period (LMP)
Most common method. Due date = LMP + 280 days (40 weeks). Assumes 28-day cycle with ovulation on day 14.
Ultrasound Dating
Most accurate method, especially in first trimester. Measures fetal size to determine gestational age.
Conception Date
Due date = Conception + 266 days (38 weeks). Most accurate if you know exact conception date.
IVF Transfer
Due date = Transfer date + 266 days - embryo age. Accounts for different embryo development stages.
Pregnancy Trimesters
First Trimester
- • Major organ development
- • Morning sickness common
- • Fatigue and mood changes
- • First ultrasound at 8-12 weeks
Second Trimester
- • Baby's movements felt
- • Gender can be determined
- • Energy levels improve
- • Anatomy scan at 18-20 weeks
Third Trimester
- • Rapid growth and weight gain
- • Baby positions for birth
- • Braxton Hicks contractions
- • Preparation for delivery
Important Considerations
- Due dates are estimates: Only 4% of babies are born on their exact due date
- Full term: 37-42 weeks is considered full term
- Preterm: Before 37 weeks
- Post-term: After 42 weeks
- Regular checkups: Important for monitoring both mother and baby's health
Disclaimer: This calculator provides estimates only. Always consult with your healthcare provider for personalized medical advice and regular prenatal care. Every pregnancy is unique and may require different monitoring and care.
