bumpcalc.comOvulation Calculator
Enter the first day of your last period and cycle length to estimate ovulation, fertile days, and your next period date.
Enter your LMP date to estimate ovulation and fertile days.
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Frequently Asked Questions
When am I most fertile?
You are most fertile in the 5 days before ovulation and on the day of ovulation itself — this is called the 'fertile window.' Ovulation typically occurs about 14 days before your next period starts. The 2-3 days leading up to ovulation are when pregnancy is most likely.
How many days after my period do I ovulate?
For a typical 28-day cycle, ovulation usually occurs around day 14. But this varies — if your cycle is 30 days, ovulation is likely around day 16. The calculator adjusts based on your actual cycle length. Ovulation generally occurs 14 days before the NEXT period, not 14 days after the last one.
Can I get pregnant outside my fertile window?
It's very unlikely but not impossible. Sperm can survive up to 5 days in the reproductive tract, and ovulation timing can vary from cycle to cycle. For the best chance of conception, focus on the 5-day window before and including ovulation day.