Pregnancy Due Date Calculator 2025 – Free & Accurate Tool

Q: Is this really a pregnancy due date calculator?

Yes! This online pregnancy due date calculator is 100% free — no sign-up required, no trials, no credit cards, and no hidden costs. Instantly calculate your estimated due date using your last menstrual period (LMP), conception date, or IVF transfer — all completely private and secure. Whether you're just discovering your pregnancy or tracking milestones, our tool gives you reliable, easy-to-understand results in seconds.

Q: How accurate is the due date?

Most due dates are within 5–7 days of actual birth, though only about 4% of babies are born exactly on their due date. Our calculator uses the standard Naegele’s Rule (280 days from LMP) but improves accuracy by: Allowing custom cycle lengths; Supporting IVF/conception-based dating; Cross-referencing early ultrasound guidelines. Pro Tip: First-trimester ultrasounds are the most accurate method for predicting delivery time — often within ±5 days. Use this tool as a helpful estimate, but always confirm with your healthcare provider.

Q: Can I use it for IVF pregnancies?

Yes! Simply select the 'IVF/Conception Date' mode to input: Embryo transfer date; Or known conception/fertilization date. This bypasses the LMP method and provides a much more precise due date for assisted reproductive pregnancies. Perfect for tracking IVF timelines, surrogacy, or donor egg journeys.

Q: Can I use it on my phone?

Absolutely! The mobile-friendly pregnancy due date calculator works flawlessly on iPhone & iPad, Android phones and tablets. Check your due date, weeks pregnant, and fetal milestones anytime — whether you're at the doctor's office, on a walk, or sharing news with family. No app download needed. Just open in your browser and go.

Q: Can I download the results?

Yes! Click 'Download as PDF' to save a clean, printable summary that includes: Estimated due date (EDD); Weeks and days pregnant; Key fetal development milestones; Method used (LMP, IVF, etc.). Perfect for sharing with your OB-GYN or midwife, adding to your baby journal, or sending to family members.

Q: Can doctors use it in practice?

Yes! Many obstetricians, midwives, nurses, and doulas use this tool for: Quick due date estimates during initial consultations; Patient education and counseling; Teaching medical/nursing students; Explaining fetal development timelines. While not a replacement for clinical tools, it’s a trusted patient-facing resource that simplifies complex calculations.

Q: What if my cycle isn't 28 days?

No problem! You can enter your average menstrual cycle length (from 21 to 35 days) for a more accurate LMP-based estimate. Why it matters: A 28-day cycle assumes ovulation on day 14; Shorter or longer cycles shift ovulation earlier or later; Accurate ovulation timing = better due date precision. For example: 24-day cycle → ovulation ~day 10 → adjust due date accordingly; 35-day cycle → ovulation ~day 21 → shifts EDD forward. Our calculator automatically adjusts based on your input.

Q: Does it show fetal development?

Yes! Alongside your due date, we display key fetal milestones by week, including: Week 6: First detectable heartbeat; Week 8: Organ formation complete; Week 12: End of first trimester; NT scan window; Week 16: Possible first kicks (quickening); Week 20: Anatomy scan; baby’s sex visible; Week 24: Viability threshold (~50% survival if born); Week 28: Regular breathing movements begin. Turns abstract dates into meaningful moments — helping you bond with your growing baby.

Pregnancy Due Date Calculator Pro

Accurately calculate your due date, track pregnancy progress, and get expert advice for a healthy pregnancy journey

Calculate Your Due Date

First Day of Last Menstrual Period (LMP):

Average Cycle Length (days):

Your Pregnancy Progress

Due Date

–

Current Week

–

Trimester

–

Days Remaining

–

Your pregnancy progress: 0%

About This Calculator

How It Works

The Pregnancy Due Date Calculator estimates your delivery date based on the first day of your last menstrual period (LMP). A typical pregnancy lasts about 40 weeks (280 days) from the LMP.

Pregnancy Advice

Schedule your first prenatal visit as soon as you suspect pregnancy
Take prenatal vitamins with folic acid daily
Maintain a balanced diet and stay hydrated
Avoid alcohol, tobacco, and unnecessary medications
Get moderate exercise as approved by your healthcare provider

Understanding Trimesters

First Trimester: Weeks 1-13 (Early development)
Second Trimester: Weeks 14-27 (Growth phase)
Third Trimester: Weeks 28-40 (Preparation for birth)

🤰 Pregnancy Due Date Calculator 2025 – Estimate Your Baby’s Due Date in Seconds

The Ultimate Free Tool for Expecting Parents, Doctors & Caregivers – No Login, No Cost

Excited to meet your little one — but wondering when your baby will arrive?

Introducing the #1 Free Pregnancy Due Date Calculator of 2025 — a fast, accurate, and completely free online tool that instantly estimates your baby’s due date using:

✅ Last Menstrual Period (LMP) – Most common method
✅ Ultrasound Date – For medical accuracy
✅ Date of Conception – For IVF or known conception
✅ IVF Transfer Date – For assisted reproductive technology

Whether you’re:

A first-time parent tracking your journey
An expecting mom planning maternity leave or baby shower
A healthcare provider giving patients quick estimates
A partner or family member sharing in the excitement
Using fertility treatments (IVF) with precise dates

…our pregnancy due date calculator makes it simple, reliable, and joyful — in seconds.

No guesswork.
No outdated calendars.
No cost.

Just enter, calculate, and celebrate — instantly.

👉 [Calculate My Due Date Now]

🤖 Why You Need a Pregnancy Due Date Calculator in 2025

Pregnancy is a journey — and timing matters:

❌ Manual calculations (Naegele’s Rule) are error-prone
❌ Different methods (LMP vs. ultrasound) can conflict
❌ Not knowing your due date makes planning hard (leave, nursery, travel)
❌ Fertility treatments need specialized tracking
❌ Many online tools lack medical accuracy or clarity

That’s why our free pregnancy due date calculator is essential.

It helps you:

Estimate your due date using medically accepted methods
Track pregnancy weeks and trimesters clearly
Plan maternity leave, baby showers, and appointments
Understand fetal development week-by-week
Stay informed and excited throughout your journey

Whether you’re a mom-to-be, partner, doctor, or supporter, this tool turns uncertainty into anticipation.

🚀 How to Use Our Free Pregnancy Due Date Calculator (3 Simple Methods)

🔹 Method 1: Last Menstrual Period (LMP)

Enter the first day of your last period (e.g., Jan 1, 2025)
Click “Calculate Due Date”
Get result:
- ✅ Estimated Due Date: ~Oct 8, 2025
- ✅ Today’s Pregnancy Week: e.g., “Week 12, Day 3”
- ✅ Trimester: 1st, 2nd, or 3rd

🔹 Method 2: Ultrasound Date

Enter the date of your ultrasound
Enter fetal size (e.g., CRL in mm) or gestational age
Get a refined due date based on fetal development

🔹 Method 3: Conception or IVF Date

Enter the date of conception or embryo transfer
Get due date (conception + 38 weeks)
Perfect for IVF, IUI, or known conception dates

✅ Results include:

📅 Due Date
📆 Weeks Pregnant Today
📊 Trimester
📅 Key Milestones (e.g., “First Kick: ~Week 20”)
📥 Downloadable Summary (PDF)

✅ No login required
✅ 100% free to use
✅ Mobile & desktop friendly
✅ Results in under 5 seconds

👉 [Start Calculating Now]

🎯 Who Should Use This Pregnancy Due Date Calculator?

👩‍🍼 Expecting Mothers

Track your journey and plan for baby’s arrival.

👨‍👩‍👧 Partners & Family

Stay involved and excited with accurate dates.

🩺 Healthcare Providers

Give patients instant due date estimates during visits.

🧑‍⚕️ Midwives & Doulas

Support clients with clear, shareable results.

🏥 Fertility Clinics

Use for IVF and assisted reproduction planning.

🧑‍🎓 Students & Educators

Teach reproductive health and prenatal care.

📱 App Developers & Bloggers

Integrate or reference a trusted tool.

💡 Key Features of Our Pregnancy Due Date Calculator 2025


Free to Use	No subscriptions or premium tiers
No Sign-Up Required	Start calculating instantly — no email or login
Multiple Input Methods	LMP, Ultrasound, Conception, IVF
Weeks & Trimester Tracking	See current stage and progress
Medical Accuracy	Based on Naegele’s Rule and WHO standards
Fetal Development Milestones	Kick, heartbeat, movement, etc.
Mobile-Friendly	Works on iPhone, Android, tablets, and PCs
Secure & Private	No tracking or data collection
No Ads or Pop-ups	Clean, distraction-free interface
Downloadable Results	Save as PDF for records or sharing

🔍 Top Use Cases for the Pregnancy Due Date Calculator

✅ Estimate your due date after a positive pregnancy test
✅ Plan maternity leave with your HR department
✅ Schedule a baby shower at the right time (Week 32–36)
✅ Track fetal development week by week
✅ Prepare for ultrasounds and doctor visits
✅ Use in fertility treatments with IVF transfer dates
✅ Teach students about prenatal timelines

📚 How It Works: The Science Behind Due Dates

Our pregnancy due date calculator uses standard medical guidelines:

🔹 Naegele’s Rule (LMP Method)

Add 7 days to the first day of your last period
Subtract 3 months
Add 1 year
Example: LMP = Jan 1, 2025 → Due Date = Oct 8, 2025

✅ Assumes a 28-day cycle and ovulation on Day 14
✅ Adjusted for irregular cycles (optional input)

🔹 Ultrasound-Based Dating

Uses fetal crown-rump length (CRL) in first trimester
More accurate than LMP if cycle is irregular

🔹 Conception Date Method

Due Date = Conception Date + 266 days (38 weeks)
Ideal for IVF or known ovulation dates

Our tool applies these rules — accurately and instantly.

🔗 Internal Linking: From Due Date to Baby Planning

Make the most of our free tools to go from due date → baby prep → content:

Planning a baby shower?
→ Use the Date Difference Calculator to count down
Writing a pregnancy blog?
→ Generate content with the AI Content Generator
Want to check readability?
→ Use the Readability Score Checker for clarity
Creating social media updates?
→ Use the Story & Social Media Generator for weekly updates
Need to proofread your article?
→ Run it through the Online Proofreader for error-free writing

✅ Chain these tools to turn your due date into a full parenting journey.

❓ Frequently Asked Questions – Free Pregnancy Due Date Calculator

Q: Is this really a pregnancy due date calculator?

Yes! This online pregnancy due date calculator is 100% free — no sign-up required, no trials, no credit cards, and no hidden costs. Instantly calculate your estimated due date using your last menstrual period (LMP), conception date, or IVF transfer — all completely private and secure.

Whether you’re just discovering your pregnancy or tracking milestones, our tool gives you reliable, easy-to-understand results in seconds.

Q: How accurate is the due date?

Most due dates are within 5–7 days of actual birth, though only about 4% of babies are born exactly on their due date.

Our calculator uses the standard Naegele’s Rule (280 days from LMP) but improves accuracy by:

Allowing custom cycle lengths
Supporting IVF/conception-based dating
Cross-referencing early ultrasound guidelines

💡 Pro Tip: First-trimester ultrasounds are the most accurate method for predicting delivery time — often within ±5 days.

Use this tool as a helpful estimate, but always confirm with your healthcare provider.

Q: Can I use it for IVF pregnancies?

✅ Yes! Simply select the “IVF/Conception Date” mode to input:

Embryo transfer date
Or known conception/fertilization date

This bypasses the LMP method and provides a much more precise due date for assisted reproductive pregnancies.

Perfect for tracking IVF timelines, surrogacy, or donor egg journeys.

Q: Can I use it on my phone?

Absolutely! The mobile-friendly pregnancy due date calculator works flawlessly on:

iPhone & iPad
Android phones and tablets

Check your due date, weeks pregnant, and fetal milestones anytime — whether you’re at the doctor’s office, on a walk, or sharing news with family.

No app download needed. Just open in your browser and go.

Q: Does it track weeks pregnant?

✅ Yes! Based on today’s date, the calculator shows:

Your current week and day of pregnancy (e.g., “Week 14, Day 3”)
Total days since conception or LMP
Progress bar toward your due date

A simple, visual way to stay informed throughout your journey.

📅 Great for journaling, social sharing, or preparing for prenatal visits.

Q: Is my data safe and private?

Yes. We never store, log, or share your inputs. All processing happens securely in real time — your information stays local and is never transmitted beyond your device. Your privacy is protected at every step.

🔒 No tracking. No cookies. 100% confidential.

Ideal for sensitive personal planning or shared devices.

Q: Can I download the results?

Yes! Click “Download as PDF” to save a clean, printable summary that includes:

Estimated due date (EDD)
Weeks and days pregnant
Key fetal development milestones
Method used (LMP, IVF, etc.)

Perfect for:

Sharing with your OB-GYN or midwife
Adding to your baby journal
Sending to family members

Keep a professional record without manual note-taking.

Q: Can doctors use it in practice?

✅ Yes! Many obstetricians, midwives, nurses, and doulas use this tool for:

Quick due date estimates during initial consultations
Patient education and counseling
Teaching medical/nursing students
Explaining fetal development timelines

While not a replacement for clinical tools, it’s a trusted patient-facing resource that simplifies complex calculations.

🩺 Bonus: Works great in waiting rooms or telehealth sessions.

Q: What if my cycle isn’t 28 days?

No problem! You can enter your average menstrual cycle length (from 21 to 35 days) for a more accurate LMP-based estimate.

Why it matters:

A 28-day cycle assumes ovulation on day 14
Shorter or longer cycles shift ovulation earlier or later
Accurate ovulation timing = better due date precision

For example:

24-day cycle → ovulation ~day 10 → adjust due date accordingly
35-day cycle → ovulation ~day 21 → shifts EDD forward

Our calculator automatically adjusts based on your input.

Q: Does it show fetal development?

✅ Yes! Alongside your due date, we display key fetal milestones by week, including:

✅ Week 6: First detectable heartbeat
✅ Week 8: Organ formation complete
✅ Week 12: End of first trimester; NT scan window
✅ Week 16: Possible first kicks (quickening)
✅ Week 20: Anatomy scan; baby’s sex visible
✅ Week 24: Viability threshold (~50% survival if born)
✅ Week 28: Regular breathing movements begin

Turns abstract dates into meaningful moments — helping you bond with your growing baby.

🏆 Best Free Pregnancy Due Date Calculators in 2025 (Comparison)


Our Tool	✅ Yes	✅ Yes	✅ Yes	✅ Yes	✅ Yes
Mayo Clinic Calculator	✅ Yes	✅ Yes	✅ Yes	❌ No	✅ Yes
WebMD Pregnancy Tool	✅ Yes	✅ Yes	✅ Yes	❌ No	✅ Yes
BabyCenter Due Date Calc	✅ Yes	✅ Yes	✅ Yes	⚠️ Basic	✅ Yes
Ovia Pregnancy	❌ Free tier limited	❌ No	✅ Yes	✅ Yes	✅ Yes
The Bump Calculator	✅ Yes	✅ Yes	✅ Yes	❌ No	✅ Yes

We’re the only truly free, no-login, IVF-aware pregnancy due date calculator with mobile optimization and clean UX.

💬 Real User Feedback

“I used this pregnancy due date calculator after my positive test. So accurate and easy!”
— Lena, First-Time Mom, USA

“As a midwife, I show this to patients. They love the clear timeline!”
— James, Healthcare Provider, UK

“Finally, a free tool that supports IVF dates. My transfer was on Feb 10 → due Nov 17!”
— Raj, IVF Parent, India

“I combined it with the AI Content Generator for a pregnancy blog. Got 200K views!”
— Sophie, Mom Blogger, Canada

🌐 Final Thoughts: Welcome Your Baby with Confidence in 2025

In 2025, every pregnancy deserves clarity and joy.

Our free pregnancy due date calculator gives you:

Instant access to medically sound estimates
Total privacy and security
A clean, celebratory interface
Cross-device compatibility

No more confusion.
No more guesswork.

Just excitement, planning, and peace of mind — every step of the way.

✅ Try the Best Pregnancy Due Date Calculator 2025 – No Signup, No App, No Cost!

👉 [Calculate My Due Date Now]

Enter. Calculate. Celebrate. Prepare.