Ovulation Calculator
Calculated in your browser — we never store your dataPeer-reviewed formulas (Mifflin-St Jeor, WHO)
Estimated Ovulation Date
Tue, Apr 14
Today
This calculator provides estimates for informational purposes only. It is not medical advice. Consult a healthcare professional before making health decisions.
Fertile Window
Window Opens
Thu, Apr 9
Most Fertile
Sun, Apr 12 - Tue, Apr 14
Window Closes
Wed, Apr 15
Next Expected Period
Tue, Apr 28
Cycle Length
28 days
Cycle Overview
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Period Fertile Ovulation
Understanding Your Cycle
Ovulation typically occurs 12-16 days before your next period starts (average is 14 days).
Fertile Window spans 5 days before ovulation to 1 day after, when pregnancy is possible.
Most Fertile days are the 2-3 days before and including ovulation day.
Tips for Tracking
- • Track several cycles to determine your average cycle length
- • Basal body temperature rises slightly after ovulation
- • Cervical mucus becomes clear and stretchy near ovulation
- • Ovulation predictor kits can confirm your fertile window
- • Stress and illness can affect ovulation timing
Sources & Methodology
Formula:
Ovulation Day = LMP + (Cycle Length - 14)Estimated ovulation based on menstrual cycle
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