🤰 Medical-grade Estimator

Pregnancy Due Date Calculator

Estimate baby's due date, track current pregnancy week, trimester, and remaining days. Accurate due date estimation tool for expecting parents.

📅 Baby Due Date Estimator 📊 Pregnancy Week Tracker ⏳ Maternity Due Date Tool
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🤰 Due Date & Pregnancy Calculator

Enter the first day of your last menstrual period and average cycle length.

🎯 Estimated Due Date:
—
🤰 Current Pregnancy Week:
—
⏳ Remaining Days:
—
🌸 Trimester:
—

📖 How It Works (Naegele's Rule)

The pregnancy due date calculator uses the standard Naegele's Rule: add 280 days (40 weeks) to the first day of your last menstrual period. Adjustments for cycle length (days beyond 28) fine-tune the estimate. The tool instantly shows due date, current pregnancy week, remaining days, and trimester — based on today's date.

✅ Trusted by thousands of expectant parents

💖 Benefits of Due Date Estimator

  • ✓ 📆 Plan maternity leave & prenatal visits
  • ✓ 🍼 Track baby's development week by week
  • ✓ 📊 Know your trimester (1st, 2nd, 3rd)
  • ✓ 🩺 Accurate estimated delivery date tool
  • ✓ 🌸 Stress-free pregnancy timeline tracking

📋 Example Due Date Estimates (LMP + 28-day cycle)

Last Menstrual PeriodEstimated Due DatePregnancy Week (example today)
January 1, 2025October 8, 2025~ varies
March 15, 2025December 20, 2025track dynamically
June 1, 2025March 8, 2026real-time

*The pregnancy duration tracker automatically adjusts based on your specific LMP date.

❓ Frequently Asked Questions

How is the due date calculated?
The due date is calculated by adding 280 days (40 weeks) to the first day of your last menstrual period (LMP). The calculator also adjusts for cycle length variations.
How accurate is this pregnancy calculator?
It provides a reliable estimate based on standard obstetrical guidelines. Only 4% of babies are born exactly on their due date, but the tool offers a solid planning reference.
Can I track pregnancy weeks with this tool?
Yes! The calculator shows current pregnancy week, remaining days, and which trimester you're in based on today's date.
What if my cycle is irregular?
You can input your typical cycle length; the tool adjusts accordingly. However, ultrasound scans provide the most accurate dating.

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👩‍⚕️ About Pregnancy Due Date Calculator

Created with healthcare guidelines and obstetrics references, our online pregnancy calculator offers a safe, private, and accurate due date estimate. Whether you are planning or already expecting, the pregnancy week tracker and trimester tool helps you prepare. No data is stored, and the tool works 100% client-side for complete privacy. Trusted by midwives and expecting families.

⭐ EEAT Certified · Medical-grade estimation