Ovulation Calculator
Enter the first day of your last menstrual period, average cycle length, and luteal phase length to estimate your fertile window and more.
Typically 12-16 days. Ovulation occurs at the end of the follicular phase, before the luteal phase.
Your Fertility Window
Estimated Ovulation Date:
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Your Fertile Window:
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Next Period Date:
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Earliest Pregnancy Test Date:
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Estimated Implantation Date:
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Estimated Due Date (if conception occurs)
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Estimated Trimester Breakdown
Trimester 1: —
Trimester 2: —
Trimester 3: —
Next Cycle Predictions
Enter LMP and calculate.
Tips for Ovulation Tracking
- Basal Body Temperature (BBT): Your BBT slightly rises after ovulation. Take your temperature every morning before getting out of bed.
- Ovulation Predictor Kits (OPKs): These kits detect levels of luteinizing hormone (LH) in your urine, which surges 24-36 hours before ovulation.
- Cervical Mucus: During ovulation, cervical mucus becomes clear, stretchy, and resembles raw egg white.
- Cervical Position: The cervix becomes soft, high, open, and wet during ovulation.
- Ovulation Pain: Some women experience mild pain or cramping on one side of the abdomen during ovulation.
Calculating…