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Due date calculator
Find out your estimated due date based on the first day of your last menstrual period. A small start to planning the stages of pregnancy.
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Calculate. Understand. Plan.
The calculation is based on 280 days from the last menstrual period and the difference from a 28-day cycle. Ultrasound and doctor's assessment can clarify the date; this date is not a guarantee of birth.
How is the due date calculated?
The standard calculation adds 280 days to the first day of the last menstrual period. In regular cycles where the cycle is longer or shorter than 28 days, that difference is taken into account. In cases of irregular cycles, IVF, or unknown dates, the date given by the doctor may be more appropriate.
Frequently Asked Questions
Is pregnancy age calculated from the date of conception?
Usually, pregnancy age is calculated from the first day of the last menstrual period. Therefore, the calculated age is often approximately two weeks more than the time elapsed since conception.
What if a different date is shown on the ultrasound?
Clarify with your doctor. Especially early ultrasound, when the last menstrual period date is unknown or in irregular cycles, can provide a more appropriate date.
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