Calculate your ovulation date, fertile window, and menstrual cycle tracking. Free online ovulation calculator for fertility planning.
Calculate your ovulation date, fertile window, and track your menstrual cycle with our free online calculator. Plan for pregnancy or natural family planning.
The luteal phase is the time between ovulation and the start of your next period. Most women have a 14-day luteal phase, but it can range from 10-16 days.
Enter your cycle information above to see your ovulation and fertility dates.
The release of a mature egg from the ovary, typically occurring 14 days before the start of your next period.
The 6 days leading up to and including ovulation day when pregnancy is most likely to occur.
The monthly cycle from the first day of one period to the first day of the next period.
The time between ovulation and the start of your next period, typically 14 days.
Your temperature rises slightly (0.5-1°F) after ovulation
Becomes clear, stretchy, and egg-white-like around ovulation
Some women experience mild pain or twinges on one side
May occur around ovulation due to hormonal changes
This calculator provides estimates only and should not be used as the sole method of birth control or fertility planning. Cycle lengths can vary, and ovulation may not always occur on the predicted date. For accurate fertility tracking, consider using multiple methods including basal body temperature, cervical mucus monitoring, and ovulation predictor kits. Always consult with a healthcare provider for medical advice.
The ovulation calculator provides estimates based on your menstrual cycle. However, cycle length can vary, and ovulation may not always occur exactly 14 days before your next period. Tracking basal body temperature and cervical mucus can provide more accurate predictions.
The fertile window is the 6 days leading up to and including ovulation day. Sperm can live for up to 5 days, and the egg can be fertilized for about 24 hours after ovulation.
While rare, it is possible to ovulate twice in one cycle, usually within 24 hours of each other. This can result in fraternal twins if both eggs are fertilized.