HEALTH & MEDICINE CALCULATOR
Pregnancy Due Date Calculator
A precise tool.
What is the Pregnancy Due Date Calculator & How does it work?
The due date of a pregnancy is the estimated date when a baby will be born. It is calculated based on the first day of the last menstrual period (LMP) and is typically around 40 weeks from conception.
To calculate the due date, add 40 weeks to the LMP. This method assumes a regular 28-day menstrual cycle and a pregnancy lasting exactly 40 weeks.
Due Date = LMP + 40 weeks
LMP = Last Menstrual Period
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Frequently Asked Questions
How do I calculate my due date if I know my LMP?
Add 40 weeks to the first day of your last menstrual period to estimate your due date.
What is the average duration of a pregnancy?
The average duration of a pregnancy is around 40 weeks, or about 9 months.
Can I use conception date instead of LMP to calculate due date?
No, the due date is typically calculated from the first day of the last menstrual period rather than the conception date.
How accurate is this pregnancy due date calculator?
This calculator provides an estimate and assumes a regular 28-day cycle and a 40-week pregnancy. Actual due dates can vary.
What should I do if my menstrual cycle is longer or shorter than average?
If your cycle is not 28 days, you may need to adjust the calculation accordingly, but this calculator provides a general estimate.
Can this calculator account for twins or multiple pregnancies?
This calculator is designed for single pregnancies. Due dates for multiples can vary and are typically earlier than for singleton pregnancies.
Is it possible to have a due date that falls on the weekend?
Yes, your due date could fall on any day of the week, including weekends.
Results are for informational purposes only and do not constitute professional advice.