❤️ Health & Lifestyle
Ovulation Calculator
Find your ovulation date, fertile window, and next expected period. Based on your last menstrual period and average cycle length.
Normal range: 21–35 days
Enter your last period date above to see results.
Medical Note: This calculator provides estimates based on an average cycle. Results may vary for irregular cycles. This tool is for general information only and is not a substitute for medical advice.
Frequently Asked Questions
When do I ovulate?
Ovulation typically occurs about 14 days before your next expected period. For a 28-day cycle: day 14. For a 30-day cycle: day 16. Formula: Cycle Start + (Cycle Length − 14).
What is the fertile window?
The fertile window is 6 days around ovulation: the 5 days before (sperm can survive up to 5 days) plus ovulation day itself. The day before ovulation is typically the peak fertility day.
How long is a normal menstrual cycle?
Average is 28 days, but 21–35 days is normal. Cycle length = first day of one period to first day of the next.
Can I get pregnant right after my period?
It is unlikely but possible with short cycles (21–24 days). With a 21-day cycle, ovulation could be around day 7 — and sperm survive up to 5 days.
What are signs of ovulation?
Clear, slippery cervical mucus (like egg whites), slight rise in basal body temperature, mild one-sided pelvic pain (mittelschmerz), increased libido, and possible light spotting.
Is this ovulation calculator accurate?
It provides estimates based on regular cycles. Actual ovulation varies. For precise tracking, use ovulation predictor kits (OPKs) or monitor basal body temperature (BBT).