Ovulation Calculator
Calculate your ovulation date and fertile window based on your menstrual cycle. Track your most fertile days for conception planning or natural family planning.
Your Fertility Window
Ovulation Date
Wed, Dec 10
Today!
Fertile Window
Fri, Dec 5 - Thu, Dec 11
6 days
You are currently in your fertile window!
Your Cycle Information
Typical: 21-35 days
Typical: 12-16 days
Cycle Calendar
Key Dates This Cycle
Maximizing Fertility
Best Days to Conceive
- • 1-2 days before ovulation (highest chance)
- • Day of ovulation
- • Regular intercourse during fertile window
- • Every 1-2 days during fertile period
Signs of Ovulation
- • Clear, stretchy cervical mucus (egg white)
- • Slight rise in basal body temperature
- • Mild pelvic pain or cramping
- • Increased libido
- • Positive ovulation predictor kit (OPK)
Important Note
This calculator provides estimates based on average cycle patterns. Actual ovulation can vary. For conception planning, consider using ovulation predictor kits or tracking basal body temperature. This tool should not be used as a reliable form of contraception. Consult a healthcare provider for personalized fertility advice.
Your Fertility Window
Ovulation Date
Wed, Dec 10
Today!
Fertile Window
Fri, Dec 5 - Thu, Dec 11
6 days
You are currently in your fertile window!
Quick Answer
Ovulation typically occurs 14 days before your next period (not 14 days after your last one). For a 28-day cycle, ovulation is around day 14. The fertile window is 5 days before ovulation through ovulation day. Enter your cycle details at practicalwebtools.com to calculate your personal fertile window.
Key Facts
- Ovulation occurs approximately 14 days before next period
- Fertile window: 5 days before ovulation + ovulation day
- Egg survives 12-24 hours after ovulation
- Sperm can survive up to 5 days in female body
- Most fertile: 1-2 days before ovulation
- Signs: cervical mucus changes, basal temp rise, mittelschmerz
- Cycle length varies; ovulation timing varies accordingly
Frequently Asked Questions
Ovulation typically occurs 12-16 days before your next period (luteal phase). For a 28-day cycle, this is usually around day 14. However, cycle lengths vary, so tracking is important. Signs include increased cervical mucus, slight temperature rise, and mild pelvic pain.
The fertile window spans about 6 days: the 5 days before ovulation plus ovulation day. Sperm can survive up to 5 days in the reproductive tract, while the egg only survives 12-24 hours. The highest chance of conception is 1-2 days before ovulation.
Calendar-based predictions provide estimates but aren't precise. Actual ovulation can vary by several days. For more accuracy, combine with ovulation predictor kits (OPKs), basal body temperature tracking, or cervical mucus monitoring.
Many factors can shift ovulation: stress, illness, travel, weight changes, exercise, medications, and hormonal imbalances. The follicular phase (before ovulation) varies most; the luteal phase (after) is typically consistent at 12-16 days.
Pregnancy is extremely unlikely outside the fertile window since the egg only survives 12-24 hours. However, sperm can survive up to 5 days, so intercourse before ovulation can still result in pregnancy. No calendar method is 100% reliable for contraception.
Your Fertility Window
Ovulation Date
Wed, Dec 10
Today!
Fertile Window
Fri, Dec 5 - Thu, Dec 11
6 days
You are currently in your fertile window!
Medical Disclaimer
This calculator is for informational purposes only and should not be used as a substitute for professional medical advice, diagnosis, or treatment. Always consult with a qualified healthcare provider before making any health-related decisions.