Pregnancy Calculator Calculate Due Date & Pregnancy Week
Estimate your baby's due date, current pregnancy week and trimester using your last menstrual period date.
Pregnancy Due Date Calculator
Enter your last menstrual period date to calculate your estimated due date.
Pregnancy Due Date Formula
Pregnancy due dates are commonly estimated using the first day of the last menstrual period.
Naegele's Rule
The traditional pregnancy due date calculation method is:
Pregnancy Duration
A full-term pregnancy is approximately 40 weeks from the first day of the last menstrual period.
How Pregnancy Due Date Is Calculated
A pregnancy calculator estimates the expected delivery date by adding approximately 280 days to the first day of your last menstrual period.
Because every pregnancy is different, the actual delivery date may vary depending on factors such as ovulation timing, baby growth and medical conditions.
- ✓ Estimates expected delivery date
- ✓ Tracks pregnancy progress
- ✓ Identifies pregnancy trimester
- ✓ Helps prepare for prenatal care
Example Calculation
Pregnancy Timeline
Pregnancy is divided into three important stages called trimesters.
First Trimester
Weeks 1-12. Early development begins and major organs start forming.
Second Trimester
Weeks 13-27. Baby growth increases and many mothers experience more energy.
Third Trimester
Weeks 28-40. Baby gains weight and prepares for birth.
Pregnancy Trimester Guide
Baby Development Guide
Weeks 1-12
Basic organs and body structures begin developing.
Weeks 13-20
Baby growth increases and movements may begin.
Weeks 21-32
Baby develops strength and continues growing.
Weeks 33-40
Baby prepares for delivery.
Benefits of Pregnancy Calculator
Due Date Tracking
Estimate your expected delivery date.
Week Tracking
Know your current pregnancy stage.
Planning Support
Prepare for prenatal appointments.
Free Tool
Easy online pregnancy calculator.
How To Use Pregnancy Calculator
Calculate your estimated due date and pregnancy stage in three simple steps.
Enter LMP Date
Select the first day of your last menstrual period.
Choose Pregnancy Length
Select standard pregnancy duration for calculation.
View Results
Get estimated due date, pregnancy week and trimester.
Pregnancy Health Guide
Maintaining healthy habits during pregnancy supports both mother and baby's wellbeing.
🥗 Healthy Nutrition
Eat a balanced diet with essential nutrients recommended by healthcare providers.
🏃 Safe Activity
Regular pregnancy-safe physical activity may support overall health.
🩺 Prenatal Checkups
Regular medical visits help monitor pregnancy progress.
Important Pregnancy Tips
- ✓ Follow medical advice
- ✓ Stay hydrated
- ✓ Get enough rest
- ✓ Monitor pregnancy changes
- ✓ Attend scheduled appointments
Prenatal Care During Pregnancy
Medical Visits
Regular appointments help track pregnancy progress.
Supplements
Take supplements only as advised by healthcare professionals.
Rest
Adequate sleep supports maternal health.
Wellbeing
Mental and physical wellbeing are important.
Tips For Accurate Due Date Calculation
Use Correct LMP Date
Enter the first day of your last menstrual period accurately.
Know Your Cycle Length
Irregular cycles may affect estimated dates.
Confirm With Doctor
Medical professionals provide the most accurate assessment.
Use Ultrasound Dating
Healthcare providers may use additional methods.
Pregnancy Health Disclaimer
This pregnancy calculator provides an estimated due date and pregnancy timeline for informational purposes only.
Actual pregnancy duration can vary. Always consult a qualified healthcare professional for medical advice and pregnancy care.
What Is a Pregnancy Calculator?
A pregnancy calculator is an online health tool that estimates your baby's due date, current pregnancy week and trimester based on your last menstrual period.
Pregnancy is usually calculated as 40 weeks from the first day of the last menstrual period. This method helps expectant parents understand pregnancy milestones.
How Accurate Is a Pregnancy Due Date?
A due date is an estimate rather than an exact delivery date. Only a small percentage of babies are born exactly on their calculated due date.
Pregnancy Week Calculator
Tracking pregnancy weeks helps understand baby development stages and prepare for important prenatal milestones.
Frequently Asked Questions
Track Your Pregnancy Journey
Calculate your estimated due date, pregnancy week and trimester with our free pregnancy calculator.
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