Predict your next 3 periods, fertile windows and ovulation dates based on your last period and cycle length.
21–35 days. Most women have 28-day cycles, but anything in this range is normal. Cycle length can vary by 2–7 days month to month.
2–7 days is normal. Heavy flow for the first 2 days is typical. See a doctor if periods last more than 7 days or are unusually heavy.
Cycles that vary by more than 8 days could indicate PCOS, thyroid issues or high stress. Consult a gynaecologist if irregularity persists.
Track for at least 3 months to find your average cycle. Note symptoms, flow and mood. Share this data with your doctor for accurate advice.
Menstrual health tracking has evolved from handwritten calendar notes to sophisticated digital tools used by hundreds of millions worldwide. The average menstrual cycle lasts 28 days, though a healthy range of 21 to 35 days is normal. Accurate cycle tracking helps women plan around work, travel, and examinations - practical benefits especially relevant for students appearing for CBSE boards, NEET, or UPSC Mains, where multi-day exam schedules can coincide with menstruation. This calculator predicts your next period date, fertile window, and ovulation day based on your cycle history.
According to a 2021 UNICEF report, only 36% of women in rural India have access to adequate menstrual hygiene products. The Menstrual Hygiene Day initiative, observed globally on 28 May each year, has gained significant traction across Indian schools and NGOs since 2014. The Indian government's Pradhan Mantri Bhartiya Janaushadhi Pariyojana (PMBJP) introduced subsidised sanitary napkins at Rs. 1 per pad through Jan Aushadhi Kendras in 2018, acknowledging menstrual hygiene as a public health priority. Tracking cycles accurately helps women identify irregularities such as PCOS - affecting an estimated 20% of Indian women of reproductive age.
All calculations on this page are performed entirely in your browser. No personal health data is transmitted or stored on any server. For medical concerns such as missed periods, irregular cycles, or severe pain (dysmenorrhoea), consult a gynaecologist. This tool is designed for general cycle awareness and planning, not medical diagnosis.