Ovulation Calculator
Understanding Your Fertility Journey
How to Use This Calculator
- Enter the first day of your last menstrual period in the date field
- Input your average cycle length (typically 28 days, but can range from 21-35 days)
- Click calculate to view your personalized fertility calendar
Understanding Your Results
- Ovulation Date: The day when an egg is released from your ovary. This typically occurs 14 days before your next period.
- Fertile Window: The 6-day period when pregnancy is possible, including 5 days before ovulation and the ovulation day itself.
- Next Period: The estimated start date of your next menstrual cycle.
Reading Your Fertility Chart
The fertility chart shows your estimated fertility levels throughout your cycle:
- Peak (100%): Your ovulation day - highest chance of conception
- High (80%): Your fertile window - good chances of conception
- Low (20%): Less fertile days - lower chances of conception
Important Notes
- This calculator provides estimates based on average cycle patterns. Your actual fertile window may vary.
- For the most accurate predictions, track your cycle for several months and use additional fertility signs like basal body temperature and cervical mucus changes.
- If your cycles are irregular or you're concerned about fertility, consult with a healthcare provider for personalized advice.
- The calculator should not be used as a method of contraception.