Pregnancy Due Date Calculator: Calculate Your Due Date and Track Your Pregnancy Progress

Expecting a baby? One of the first questions you’ll want answered is: when is my due date?

The Pregnancy Due Date Calculator helps you calculate your estimated due date (EDD) and track your pregnancy progress — all running locally in your browser for complete privacy.

🤰 What Is a Pregnancy Due Date Calculator?

A pregnancy due date calculator estimates when your baby is likely to be born based on your last menstrual period (LMP), conception date, or ultrasound measurements. It also tracks your current gestational age, shows which trimester you’re in, and displays important pregnancy milestones.

The Tooladex Pregnancy Due Date Calculator provides comprehensive pregnancy tracking with three calculation methods, trimester progress visualization, and milestone tracking — all processed entirely in your browser.

💡 Why You Need a Pregnancy Due Date Calculator

Whether you’re newly pregnant or tracking your pregnancy progress, a due date calculator is essential:

Due Date Planning
Calculate your estimated due date to plan for your baby’s arrival, schedule appointments, and prepare for maternity leave.

Pregnancy Tracking
Know exactly how many weeks and days pregnant you are, and track your progress through each trimester.

Milestone Awareness
Understand important pregnancy milestones like when you’ll reach full term, when trimesters end, and key developmental stages.

Medical Appointments
Provide accurate gestational age information to your healthcare provider for proper prenatal care.

Baby Preparation
Plan baby showers, maternity photos, and other events based on your pregnancy timeline.

Family Planning
Share your due date and pregnancy progress with family and friends.

Pregnancy Education
Learn about pregnancy trimesters, fetal development stages, and what to expect at each phase.

✨ Features of the Tooladex Pregnancy Due Date Calculator

The Tooladex Pregnancy Due Date Calculator provides comprehensive pregnancy tracking:

📅 Three Calculation Methods

LMP (Last Menstrual Period) Method
The most common method used by healthcare providers. Enter the first day of your last menstrual period, and the calculator determines your due date as 40 weeks (280 days) from that date.

Conception Date Method
If you know the exact date of conception, enter it to calculate your due date as 38 weeks (266 days) from conception.

Ultrasound Method
Enter your ultrasound date and the gestational age provided by your healthcare provider. This method is often the most accurate, especially for early ultrasounds.

📊 Comprehensive Results

Estimated Due Date
See your calculated due date prominently displayed in an easy-to-read format.

Current Gestational Age
View how many weeks and days pregnant you are, plus total days since the start of your pregnancy.

Trimester Information
See which trimester you’re in (1st, 2nd, or 3rd) with a visual progress bar showing how far through your current trimester you are.

Estimated Conception Date
View the estimated date of conception based on your calculations.

Pregnancy Milestones
See important dates including:

First trimester ends (12 weeks, 6 days)
Second trimester ends (26 weeks, 6 days)
Full term (37 weeks)
Estimated due date (40 weeks)
Post-term (42 weeks)

🔄 Automatic Updates

Real-Time Calculation
Results update automatically as you enter information — no need to click a calculate button.

Multiple Methods
Switch between calculation methods easily to compare results or use the method most appropriate for your situation.

🚀 How to Use the Pregnancy Due Date Calculator

Using the LMP Method

Select “LMP” method (default)
Enter your last menstrual period date — the first day of your last period
View results — your due date, gestational age, and milestones appear automatically

Example: If your LMP was January 1, 2024:

Due date: October 7, 2024 (40 weeks later)
Current gestational age updates daily

Using the Conception Date Method

Select “Conception” method
Enter your conception date — the date you believe conception occurred
View results — due date calculated as 38 weeks from conception

Example: If conception was January 15, 2024:

Due date: October 7, 2024 (38 weeks later)

Using the Ultrasound Method

Select “Ultrasound” method
Enter your ultrasound date — when the ultrasound was performed
Enter gestational age — weeks and days from your ultrasound report
View results — due date calculated based on ultrasound measurements

Example: Ultrasound on February 1, 2024 showing 8 weeks, 2 days:

Due date calculated based on gestational age at ultrasound

📊 Understanding Pregnancy Calculations

How Due Dates Are Calculated

LMP Method (40 weeks)
The standard method assumes:

A 28-day menstrual cycle
Ovulation on day 14
Pregnancy duration of 40 weeks from LMP

Conception Method (38 weeks)
Calculates from the actual date of conception:

Pregnancy duration of 38 weeks from conception
More accurate if you know the exact conception date

Ultrasound Method
Uses direct fetal measurements:

Most accurate method, especially early in pregnancy
Healthcare providers often use this to adjust due dates

Understanding Gestational Age

Weeks and Days
Gestational age is expressed in weeks and days, starting from the first day of your last menstrual period (or conception date).

Total Days
The total number of days since the start of your pregnancy provides another way to track progress.

Pregnancy Trimesters

First Trimester (Weeks 0-12)

Early development and organ formation
Most critical period for fetal development
Many women experience early pregnancy symptoms

Second Trimester (Weeks 13-26)

Rapid growth and movement
Often called the “honeymoon period”
Baby’s movements become noticeable

Third Trimester (Weeks 27-40)

Final growth and weight gain
Baby prepares for birth
Mother may experience more discomfort

🎯 Common Use Cases

Planning and Preparation

Maternity Leave Planning
Calculate your due date to plan when to start maternity leave and coordinate with your employer.

Baby Shower Planning
Know your due date to plan baby showers and other celebrations at appropriate times during your pregnancy.

Medical Appointment Scheduling
Use your gestational age to schedule prenatal appointments at the right times.

Tracking Progress

Weekly Milestones
Track your progress week by week and see when you’ll reach important milestones.

Trimester Awareness
Know which trimester you’re in and what to expect during each phase of pregnancy.

Development Tracking
Understand what developmental stages your baby is going through based on gestational age.

Medical Communication

Healthcare Provider Discussions
Provide accurate gestational age information to your healthcare provider for proper prenatal care.

Ultrasound Comparisons
Compare ultrasound-based due dates with LMP-based calculations to understand any adjustments.

🔢 Understanding the Results

Estimated Due Date

Your due date is an estimate, not an exact date. Only about 5% of babies are born exactly on their due date. Most babies are born within two weeks before or after the estimated due date.

Gestational Age

Current Age
Shows how many weeks and days pregnant you are right now, updating as time passes.

Total Days
The total number of days since the start of your pregnancy provides another perspective on your progress.

Trimester Progress

Visual Progress Bar
See how far through your current trimester you are with a visual progress indicator.

Percentage Complete
The exact percentage through your current trimester helps you understand your progress.

Milestones

Key Dates
Important pregnancy milestones are calculated and displayed, including:

Trimester boundaries
Full term (37 weeks)
Estimated due date (40 weeks)
Post-term (42 weeks)

🎯 Tips for Best Results

Use the Most Accurate Method Available
If you have an early ultrasound, use the ultrasound method for the most accurate due date. Otherwise, the LMP method is standard and reliable.

Know Your Cycle
If your menstrual cycle is significantly longer or shorter than 28 days, or if you ovulate on a different day, an ultrasound may provide a more accurate due date.

Consult Your Healthcare Provider
This calculator is for informational purposes. Always consult with your healthcare provider for medical advice and official due date confirmation.

Update Regularly
Your gestational age updates automatically, so you can check back regularly to see your current progress.

Track Milestones
Use the milestone dates to plan appointments, prepare for baby’s arrival, and understand what to expect at each stage.

🔒 Privacy & Security

100% Local Processing
All calculations happen entirely in your browser. Your dates and pregnancy information are never sent to our servers, stored in a database, or saved anywhere.

No Data Collection
We don’t track your dates, store your inputs, or collect any personal information. Your pregnancy information remains completely private.

Instant Results
Since everything runs locally, you get instant results without any network delays.

No Sign-Up Required
Use the calculator immediately without creating an account or providing any personal information.

⚠️ Important Medical Disclaimer

For Informational Purposes Only
This calculator is designed for informational and educational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment.

Always Consult Healthcare Providers
Always seek the advice of your physician or other qualified healthcare provider with any questions you may have regarding your pregnancy, due date, or any medical condition.

Due Dates Are Estimates
Due dates are estimates based on standard calculations. Your healthcare provider may adjust your due date based on ultrasound measurements and other factors.

Individual Variations
Every pregnancy is unique. Actual delivery dates may vary, and your healthcare provider will monitor your pregnancy and adjust care as needed.

🎉 Get Started

Ready to calculate your due date and track your pregnancy progress?

Pregnancy Due Date Calculator

Calculate your pregnancy due date and track your gestational age. Find out how many weeks and days pregnant you are, your trimester, and key pregnancy milestones.

Try Tool Now

The Pregnancy Due Date Calculator is free, works entirely in your browser, and requires no sign-up or installation. Start tracking your pregnancy journey today!

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