Ovulation Calculator

Find your ovulation date and fertile window based on cycle length.

How to Use This Calculator

  1. Enter your First Day of Last Period.
  2. Enter your Cycle Length (days).
  3. Click Calculate to see instant results with a step-by-step breakdown.
  4. Use the Share button to copy a link with your inputs pre-filled.

⚠️ Results are for informational purposes only. Always verify important calculations with a qualified professional.

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