Due Date Calculator – Precisely predict the big day

With this tool, you can find out your estimated due date based on the date of your last period and the average length of your pregnancy.
✅ Fast and accurate – Just enter your details and get the result instantly.
✅ Avoid errors – Automatic calculation based on weeks of gestation.
✅ Optimize your planning – Anticipate medical checkups, leave, and preparations.

Use our calculator now and get results in seconds.

Example Calculation with the Due Date Calculator

Imagine you want to know when your baby will be born:
📅 Last period: January 10
📐 Formula applied: LMP + 280 days
📊 Result: October 16
This means your baby could arrive around October 16, although it may vary a few days depending on development.

📢 Plan each step with confidence using our tool.

How Does Our Due Date Calculator Work?

Our calculator follows a simple three-step process:

1️⃣ Data Entry
Date of last menstruation 🩸: This date marks the beginning of the pregnancy count.

🕒 Why is it important?
Pregnancy is measured from the first day of the last menstrual period, not from conception, as this method is more standardized in medicine.

2️⃣ Automatic Calculation
We use the standard obstetric formula:
📐 EDD = LMP + 280 days (40 weeks)

This gives you a reliable estimate of the baby's birth.

3️⃣ Results and Recommendations
🔹 If the estimated date matches your plans, you can prepare for checkups, exams, and support ahead of time.
🔹 If you have any questions or irregular cycles, consult your gynecologist to adjust with an ultrasound.

📢 Want to organize your maternity calendar? Try our free tool and get complete control.

This tool is for you if you are an entrepreneur, business owner or freelancer.

We know that pregnancy doesn't stop your plans. This calculator is designed for active women who want to plan for their maternity while still making progress toward their goals.
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What is the Due Date Calculator?

The Due Date Calculator helps you determine your baby's due date by estimating 40 weeks from your last period. This information is key for planning checkups, ultrasounds, and preparing everything before the big day.
👉 Make informed decisions about your pregnancy and plan your next few weeks accurately.

Improve your informed pregnancy with these recommended books

These books will help you navigate pregnancy with more confidence, learn about your body, and prepare emotionally and physically for childbirth.

1️⃣ Nine months with mom – Dr. Rosa Jové
An emotional and scientific approach to understanding each stage of pregnancy.

2️⃣ The Pregnancy Bible – Anne Deans
Complete guide from conception to birth, ideal for first-time mothers.

3️⃣ What to expect when you're expecting – Heidi Murkoff
A modern classic with clear answers to the most common pregnancy questions.

Why Use Our Due Date Calculator?

✅ Speed – Results in seconds with a single piece of data.
✅ Accuracy – Calculation based on standard pregnancy length.
✅ Ease – No manual formulas or complex apps.
✅ Practical Application – Ideal for mothers, healthcare professionals, and clinics.

Avoid These Common Mistakes When Using the Due Date Calculator

🚫 Entered an incorrect date – Check the first day of your last cycle.
🚫 Confusing weeks with months – Gestation is measured in weeks, not exact months.
🚫 Assume it’s an accurate prediction – It’s just an estimate, not a guarantee.

Use our tool as a reliable reference point, not as a medical diagnosis.

Comparison: Due Date Calculator vs. Traditional Methods

✅ Fast and accurate – No manual counting or using a birth wheel.
✅ Avoid human errors – Automatic digital formula.
✅ Easy to use – You only need a date.
✅ Accessible and free – Available from any device, no downloads required.

Use the best tool to prepare for your baby's arrival today.

Frequently Asked Questions about the Due Date Calculator

How to easily calculate your due date?
Just enter the date of your last period and the tool will automatically calculate it.

How accurate is the estimated due date?
This is an estimate based on average. Only 51% of births occur on that exact day.

What formula is used to calculate the due date?
📐 Estimated due date = LMP + 280 days (40 weeks).

Why are 40 weeks counted from menstruation?
Because ovulation usually occurs 14 days after the start of the cycle, and this method is more standardized.

Can I use this calculator if I have irregular cycles?
Yes, but it is recommended to adjust with an ultrasound for greater precision.

Is it good for multiple pregnancies?
Yes, but multiple pregnancies tend to be shorter. Consult your specialist.

What if I don't remember the exact date?
Use the approximate date or consult your medical history for greater accuracy.

Can it be calculated with the date of conception?
It is possible, but LMP is the most common method in medicine.

Does the calculator indicate the sex of the baby?
No, this tool only estimates the expected delivery date.

Is it safe to use it more than once?
Yes, you can use it as long as you enter the LMP correctly.