Calculating the due date and week of pregnancy (calculator)

Calculating the due date and week of pregnancy (calculator)

Do you want to know the date of birth? Your gynaecologist will tell you the most accurate date. You can calculate the approximate date of birth of your child according to its conception.
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Calculator, calculating the term: date of birth and week of pregnancy?

Calculating the most accurate date of birth is problematic. It is impossible to determine 9 months in advance the specific day when your baby will come into the world.

Why is it impossible to calculate the exact date of birth?

This may be because you do not know the exact time of fertilization. Even if you know the exact time of fertilization, many factors affect pregnancy and fetal growth.

The exact date of delivery is also hampered by the length of the menstrual cycle, irregular menstruation and various hormonal variations.

The gynaecologist will determine a more accurate term and date of delivery on the basis of a sonographic examination. The date of delivery is adjusted several times during the pregnancy based on the findings.

The calculator will serve you well in calculating the approximate date of delivery. It may differ from the actual date of delivery by up to 2 weeks.

As an added bonus, the calculator will calculate the approximate week of pregnancy. From this you can derive the number of days remaining until delivery.


Physiological labour takes place between the 38th and 42nd week of pregnancy.

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Important notice:

Please remember that the results of our health calculators and analyzers are for guidance purposes only. They are not a substitute for a professional examination or the advice of a doctor, pharmacist or other health care professional.

Each person is unique, and everyone's needs may vary. Calculators and analyzers have limitations and do not provide a comprehensive individual view of health.

Their use is at your own risk. Neither the site operator nor the author is responsible for misuse and misinterpretation of information obtained through their use. By using the calculators and analyzers, you agree to these terms and conditions and neither the operator nor the author shall be liable for any consequences.

You are advised to consult a professional for your medical condition. Remember that health is an important topic and any decisions should be made in consultation with a professional.

This calculator/analyzer is not a medical tool or medical aid. Consult your doctor about your health problem.

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