The Menstrual Cycle Calculator by SMART AI CALCULATOR helps women in India & USA track their next period date, estimate ovulation day, and identify the fertile window easily.
The menstrual cycle is the monthly hormonal cycle a woman’s body goes through to prepare for pregnancy. It is counted from the first day of one period to the first day of the next period. A normal cycle length ranges from 21 to 35 days.
The next period date is calculated by adding the average cycle length to the first day of the last period. Ovulation is estimated about 14 days before the next period, and the fertile window includes several days around ovulation.
Yes, but cycles between 21–35 days are also normal.
Yes, stress can delay or skip periods.
It provides estimates; consult a doctor for medical advice.