Below is a simple ovulation calendar (ovulation calculator) that you can use to calculate your most fertile days (ovulation) and also predict your due date if you happen to conceive during those days.
There are just two parameters that this calculator takes into account – the date of your last menstrual period and the usual duration of your menstrual cycle.
Usual menstrual cycle lasts 28 days and it’s calculated from the first day of the last menstrual period until the first day of the next menstruation. If your cycle is irregular you wont be able to rely on this ovulation calculator alone. You may want to consider using an ovulation kit or try some other methods of predicting ovulation that we’ll write about in the future.
There is a possibility that the calculator does not calculate the exact day of fertile period / day of ovulation. You are using this calculations at your own risk.