This pregnancy calculator is a tool that is designed to estimate the due date of a pregnancy based on the date of a woman’s last menstrual period (LMP) and the length of her menstrual cycle.
The calculator works by using the first day of the LMP and then adding 280 days (40 weeks) to that date, which is the average length of a full-term pregnancy.
In this formula, you would take the date of the first day of the woman’s last menstrual period, and then add 280 days to that date. This assumes a pregnancy length of 40 weeks, which is the average length of a pregnancy.
This formulas for calculating pregnancy due date based on the last menstrual period (LMP), conception date, and due date:
Calculating Due Date based on Last Menstrual Period (LMP):
- Due Date = LMP + 280 days
(Note: 280 days is the average length of a pregnancy, or 40 weeks)
Calculating Conception Date based on Last Menstrual Period (LMP):
- Conception Date = LMP – 14 days
(Note: This assumes a 28-day menstrual cycle with ovulation occurring on day 14)
Calculating Due Date based on Conception Date:
- Due Date = Conception Date + 266 days
(Note: 266 days is the average length of pregnancy after conception, or 38 weeks)
A Guide to Determine How Soon Can You Test
One of the first indicators of pregnancy is a missed menstrual cycle. That’s why we normally advise people to wait until they’ve missed their period before getting a pregnancy test. If you can’t wait that long and know when your last period was, we can calculate your chances of conception and pregnancy due date.
It is important to note that while a pregnancy calculator can provide an estimate of a due date, it is not a substitute for medical advice and should be used in conjunction with prenatal care from a healthcare provider.