Ovulation Calculator

How It Works

• Ovulation Estimate: Ovulation ≈ LMP + (cycle length − luteal phase). Default luteal phase is 14 days.
• Fertile Window: Typically 5 days before ovulation to 1 day after (sperm can survive up to 5 days).
• Next Period: Estimated as LMP + cycle length.
• Projections: Future cycles calculated by advancing LMP by cycle length for each projection.