How to Use the Baby Due Date Calculator – Estimate Your Pregnancy Timeline

Expecting a baby? Our Baby Due Date Calculator helps estimate your delivery date based on your last menstrual period (LMP), conception date, or ultrasound data. While only 5% of babies are born exactly on their due date, this tool gives you a helpful timeframe to prepare for your little one's arrival.

How to Use the Due Date Calculator

Step 1: Choose Your Calculation Method

Select one of three options:
1️⃣ Last Menstrual Period (LMP) – Most common method (default).
2️⃣ Conception Date – If you know the exact conception day.
3️⃣ Ultrasound Date – For medical estimates.

Step 2: Enter Your Date

• For LMP: Input the first day of your last period.

• For Conception: Enter the estimated conception date.

• For Ultrasound: Provide the ultrasound date and how many weeks pregnant you were at that scan.

Step 3: Click "Calculate Due Date"

The tool instantly processes your data and displays:
✅ Estimated Due Date – Your projected delivery day.
✅ Current Pregnancy Week – How far along you are today.
✅ Days Remaining – Countdown to your due date.
✅ Key Milestones – Important fetal development stages.

Why Use This Tool?

✔ Medical Standard – Uses the Naegele's rule (LMP + 280 days).
✔ Multiple Methods – Works with LMP, conception, or ultrasound data.
✔ Helpful Planning – Track pregnancy progress and prepare for birth.
✔ Free & Instant – No registration needed.

Understanding Due Date Accuracy

• Only 5% of babies arrive exactly on their due date.

• Most births occur 2 weeks before or after the estimated date.

• Ultrasound dating (especially in the first trimester) is the most accurate method.

FAQ

What if I don't know my LMP?

📅 Use conception date (if known) or consult an early ultrasound for the best estimate.

Can I change my due date later?

🔄 Yes! If an ultrasound provides a different estimate, recalculate using the ultrasound method.

Why does pregnancy count from LMP and not conception?

🩺 Medical tradition – LMP is easier to track than conception, which isn't always known.

Conclusion

Our Baby Due Date Calculator helps expecting parents estimate their baby's arrival and track pregnancy progress. While dates may adjust, it’s a great starting point for planning!

Calculate your due date now and start preparing for your little one!