These ovulation calculators will tell you when you’re most likely to be fertile over the next six months. To increase the chances of getting pregnant, just tell the first day of last period and how long your cycle usually lasts (between 20 and 45 days).
These tools provides approximate dates only and assumes a regular menstrual cycle. If your menstrual cycles are irregular, you may have trouble pinpointing your day of ovulation based on this calendar alone. Find out about ovulation predictor kits.