Conceive Calculator
Your fertility chance & best days to try
Your Cycle History
Each calculation is saved with full dates so you can compare your last few cycles side by side.
No history yet. Calculate below to start tracking.
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First Day of Last Period
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Average Cycle Length
Cycle Length
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Average Period Length
Period Length
✨ Your Fertility Forecast
Today's Conception Chance
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💖 Best Days to Try This Cycle
Daily Fertility Chance This Cycle
Peak
High
Medium
Low
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Ovulation Day
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Days to Ovulation
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Next Period
Safe Day Calculator
Fertility awareness is not as reliable as other contraception methods — consult a doctor for family planning advice.
⚠️ Unsafe (Fertile) Days
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✅ Relatively Safe Days
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🌱 Tips to Boost Your Chances
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Time It Right
Have intercourse every 1–2 days during your fertile window, especially the 2 days before ovulation.
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Take Folic Acid
Start a prenatal vitamin with 400–800mcg folic acid at least 1 month before trying.
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Track Ovulation Signs
Watch for egg-white cervical mucus, BBT rise, or use an OPK (ovulation predictor kit) to confirm timing.
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Eat a Balanced Diet
Focus on whole grains, healthy fats, lean protein, and fertility-friendly foods for both partners.
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Limit Alcohol & Smoking
Both reduce fertility in men and women — cutting back improves conception odds.
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Maintain a Healthy Weight
Both being under- and overweight can disrupt ovulation — aim for a healthy BMI range.
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Manage Stress & Sleep
Chronic stress and poor sleep can affect hormone balance and cycle regularity.
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Don't Forget Partner Health
Sperm health matters too — avoid overheating (hot tubs), limit alcohol, and stay active.
If you've been trying for 12+ months (or 6+ months if over 35) without success, consider speaking with a fertility specialist.
