Pregnancy Due Date Calculator

Calculate your estimated due date (EDD) and track important pregnancy milestones with our accurate due date calculator. This tool uses standard medical calculations to help you plan for your baby’s arrival.

Why Use This Calculator?

• Get an accurate estimate of your due date
• Track important pregnancy milestones
• Plan medical appointments
• Prepare for maternity leave
• Share expected arrival date with family
• Monitor fetal development stages

Understanding Due Date Calculation

The calculator uses two standard methods:

1. Last Menstrual Period (LMP) - Most common method, adds 280 days (40 weeks) to the first day of your last period
2. Conception Date - Adds 266 days (38 weeks) to the date of conception

Naegele’s Rule

The standard medical calculation (Naegele’s Rule) follows this formula:

1. Take the first day of your last menstrual period
2. Add 1 year
3. Subtract 3 months
4. Add 7 days

Pregnancy Milestones

First Trimester (Weeks 1-12)

• Week 4: Implantation occurs
• Week 6: Heartbeat may be detected
• Week 8: Major organs begin forming
• Week 12: Risk of miscarriage decreases

Second Trimester (Weeks 13-26)

• Week 16-20: Baby’s movements may be felt
• Week 18-22: Gender can often be determined
• Week 24: Viability milestone
• Week 26: Baby’s hearing develops

Third Trimester (Weeks 27-40)

• Week 28: Baby’s eyes open
• Week 32: Baby’s bones fully develop
• Week 37: Baby is considered full term
• Week 40: Expected delivery date

Important Notes

• Due dates are estimates - only 4% of babies are born on their exact due date
• Full-term pregnancy ranges from 37 to 42 weeks
• Consult your healthcare provider for personalized medical advice
• Regular prenatal care is essential for a healthy pregnancy

Medical Considerations

When to See Your Doctor

• As soon as you suspect pregnancy
• If you have irregular periods
• If you have any underlying health conditions
• For regular prenatal checkups

Risk Factors to Discuss

• Advanced maternal age
• Previous pregnancy complications
• Chronic health conditions
• Family history of complications

Technical Notes

• Calculations are based on standard medical guidelines
• Dates assume regular 28-day menstrual cycles
• Accuracy may vary for irregular cycles
• Results should be confirmed by a healthcare provider

Additional Resources

• Schedule regular prenatal visits
• Track your pregnancy symptoms
• Monitor fetal movement
• Maintain a healthy lifestyle
• Stay informed about pregnancy stages