How Many Months Am I? To calculate how many months you are, first determine the number of days since your last menstrual period began. Add this number to the number of days in your current menstrual cycle.
This will give you the total number of days since you last ovulated. Divide this number by the average length of a menstrual cycle (28 days). This will give you the number of menstrual cycles since you last ovulated. Multiply this number by the average length of a menstrual cycle (4 weeks).
This will give you the number of weeks since you last ovulated. Finally, multiply this number by 7 to get the total number of days since you last ovulated. Divide this number by the average length of a menstrual cycle (28 days) to get the number of menstrual cycles since you last ovulated.
