Menstrual Cycle Calculator is an online tool that can help you keep track of your menstrual cycles, predict your next periods, and identify your fertile days. It could help you understand more about your body and health by providing information about the phases of your cycle, the signs of ovulation, and the factors that can affect your cycle.

To use this menstrual cycle calculator, you need to enter some basic data about your previous periods, such as the date of the first day of your last period, the duration of your period, and the average length of your cycle. Based on this information, the calculator will estimate the dates of your future periods, ovulation, and fertile window for up to 1~2 month.

Tip: Menstrual Cycle Calculator can be useful for various purposes, such as planning a vacation, avoiding pregnancy, trying to conceive, or monitoring your health. However, it is important to remember that a menstrual cycle calculator is not a reliable method of birth control or pregnancy detection. It is based on averages and assumptions, and it cannot account for individual variations or irregularities in your cycle. Therefore, you should always consult your health care provider if you have any questions or concerns about your menstrual health.