How do I calculate when my next period will be?

Now that you know how to calculate your average cycle length, you can figure out when your next period is due. To do this, start on the first day of your last period and count out the number of days in your average cycle. That’s the projected start date of your next period.

How do I calculate my free period?

Find out the last day of your fertile window by subtracting 11 from your length of the longest cycle. For example, if it was 30 days, you’d get day 19. The time between the shortest and longest day is your fertile window. In the above example, it would be between days 9 and 19.

How does the period calculator work for You?

It gives you the estimated starting dates for the next 12 periods. All you have to do is to enter the starting date of your last period and the average length of your period cycle. Period cycle is the length of time in days from the start of one period to the start of the next one.

How to calculate the last day of your menstrual cycle?

The EDD can be calculated by adding 266 days to the day of ovulation/fertilization. What is the last menstrual period (LMP)? The LMP is the date of the first day of the last menstrual period you had before conceiving. It is the first day that your last menstrual cycle begins when you see bright red blood, not just a little brown spotting.

Do you use the LMP on the period calculator?

That is the date you use when entering the LMP on an online period calculator. Whether you are trying to get pregnant or not trying to get pregnant, keeping track of your menstrual periods is vital. Besides pregnancy, missing a menstrual period could also be a sign of other issues like missed ovulation.

How is the estimated due date ( EDD ) calculated?

Calculating an accurate due date is an important first step in pregnancy. The calculation of the estimated due date (EDD) is based on the day of the date of ovulation and fertilization. The EDD can be calculated by adding 266 days to the day of ovulation/fertilization. What is the last menstrual period (LMP)?