Pregnancy Due Date Calculator - Calculate Your Baby's Due Date
Calculate your pregnancy due date and track important milestones based on your last menstrual period or conception date with accurate gestational age tracking
Pregnancy Due Date Calculator
Your Due Date Results
What is a Pregnancy Due Date Calculator?
A Pregnancy Due Date Calculator is a medical tool that estimates when your baby will be born based on your last menstrual period (LMP) or conception date. It calculates the expected delivery date using the standard 280-day (40-week) pregnancy duration.
This calculator helps you:
- Track pregnancy progress - Monitor gestational age and milestones
- Plan prenatal care - Schedule important appointments and tests
- Prepare for delivery - Estimate when to expect your baby
- Monitor trimesters - Understand pregnancy stages and development
How Pregnancy Due Date Calculator Works
The calculation uses Naegele's Rule:
For conception date method:
The calculator accounts for average cycle length variations and provides estimated conception date, trimester milestones, and full-term pregnancy range.
Understanding Pregnancy Timeline
Gestational Age
Pregnancy duration measured from the first day of your last menstrual period, typically 40 weeks.
Trimesters
Pregnancy is divided into three trimesters: 1st (0-12 weeks), 2nd (13-27 weeks), 3rd (28-40 weeks).
How to Use This Due Date Calculator
Choose Method
Select LMP or conception date calculation method
Enter Date
Input your last menstrual period or conception date
Set Cycle Length
Adjust average cycle length if different from 28 days
Get Results
View due date and pregnancy milestones
Benefits of Tracking Your Due Date
- • Prenatal Planning: Schedule important medical appointments and tests at the right time.
- • Milestone Tracking: Monitor baby's development and pregnancy progress week by week.
- • Birth Preparation: Plan maternity leave, hospital bag, and delivery arrangements.
- • Health Monitoring: Track symptoms and changes throughout each trimester.
Factors That Affect Due Date Accuracy
1. Cycle Regularity
Irregular menstrual cycles can affect LMP-based calculations. Ultrasound dating may be more accurate.
2. Ovulation Timing
Women who ovulate earlier or later than day 14 may have different conception dates than estimated.
3. Individual Variation
Each pregnancy is unique. Only 5% of babies are born on their exact due date.
Frequently Asked Questions (FAQ)
Q: How accurate is a pregnancy due date calculator?
A: Pregnancy due date calculators are accurate within 1-2 weeks. Only about 5% of babies are born on their exact due date, with most births occurring within 2 weeks before or after the calculated date.
Q: What information do I need to calculate my due date?
A: You need either the first day of your last menstrual period (LMP) or your conception date. The LMP method is most commonly used and considered the standard for medical calculations.
Q: Can I use this calculator if I have irregular periods?
A: If you have irregular periods, the LMP method may be less accurate. In such cases, an ultrasound dating scan performed by your healthcare provider will give more precise results.
Q: When should I see a healthcare provider during pregnancy?
A: Schedule your first prenatal appointment as soon as you confirm pregnancy, ideally between 6-8 weeks. Regular prenatal care is essential for monitoring both mother and baby's health throughout pregnancy.