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The Pregnancy Due Date Calculator
The Pregnancy Due Date Calculator
With the Free Online Pregnancy Due Date Calculator, you can determine your baby's expected birth date.
The calculation is based on two methods, the medical standard and a biologically more accurate option. Using either method and if you know the correct dates, you can estimate a fairly accurate birth window. The exact day calculated, however, will rarely be the actual birth date.
Wishing you all the best for your pregnancy!
Instructions
Calculation Method: Choose the method from the dropdown menu. Last Period is commonly used in medical check-ups because the first day of the last period is easy to remember and provides a standardized starting point.
Calculation with Last Period (Medical Standard): Use this option if you know the first day of your last period. The calculation is based on 280 days (40 weeks).
Enter Date: Input the first day of your last period.
Cycle Length: Enter your cycle length in days if it differs from the standard 28 days. The cycle length refers to the total duration from the first day of one period to the day before the next period begins.
Calculate: Click the "Calculate" button to see your estimated due date.
Results: The calculator will display your baby's expected due date, the most likely birth window, and the number of days remaining if applicable.
Calculation with Conception/Ovulation (Biologically Accurate): Use this option if you know the date of conception or ovulation. The calculation is based on 266 days (38 weeks).
Enter Date: Input the relevant date of conception or ovulation.
Calculate: Click the "Calculate" button to see your estimated due date.
Results: The calculator will display your baby's expected due date, the most likely birth window, and the number of days remaining if applicable.
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