🌸 Ovulation Calculator
Estimate your fertile days, ovulation day and next period from your cycle.
⚠️ Guidance estimate for regular cycles. Not a reliable contraceptive method and not a substitute for medical advice.
Frequently asked questions
How are fertile days calculated?
Ovulation happens about 14 days before the next period. The fertile window covers the 5 previous days plus ovulation day, since sperm survive up to 5 days.
Does it work with irregular cycles?
With caveats: the math assumes regular cycles. If yours vary a lot, the result is less reliable; consult your doctor.
Can I use it as contraception?
No. The rhythm method has a high failure rate. Do not use this calculator to avoid pregnancy.