Ovulation is your body’s monthly cue. With the help of Tracking, you can easily understand your fertile window and your hormones on a deeper level.
Most calculators assume a 28-day cycle. Our calculator adapts to your unique rhythm—irregular periods, post-miscarriage, or anything in between.
All calculations happen right in your browser. We don’t store, process, or peek. Your body, your business.
Ovulation usually occurs mid-cycle, but your fertile window spans several days. Knowing the full fertile window can help with pregnancy planning, or avoiding it.
Ovulation tracking goes beyond day 14. We help you pinpoint the most fertile days, and track signs like cervical mucus or basal body temperature (BBT).
When you're ready to start or grow your family, understanding your body’s rhythm is everything. With Lunara’s Ovulation Calculator, you can get a clearer picture of your most fertile days — and take one step closer to conception.
Ovulation typically occurs about midway through your menstrual cycle — that’s when your body releases an egg that can be fertilized. This egg stays viable for 12 to 24 hours, but sperm can live inside the body for up to five days. That’s why your fertile window spans about six days in total.
Lunara’s accurate ovulation calculator estimates this window by using the first day of your last period and your average cycle length. Whether you want to calculate your ovulation day, find your ovulation date, or need a reliable ovulation tracker for irregular periods, Lunara is here to guide you.