Conception Calculator

Estimate when conception occurred based on your due date or last menstrual period.

Calculate Conception Date
days

Typical range: 21-35 days (default is 28)

How Conception Works

Conception typically occurs during ovulation, which happens about 14 days before your next expected period. For a standard 28-day cycle, this is around day 14.

  • Ovulation: An egg is released from the ovary and is viable for 12-24 hours.
  • Sperm Survival: Sperm can survive in the reproductive tract for up to 5 days.
  • Fertile Window: The 6 days leading up to and including ovulation.

⚠️ This calculator provides estimates only. Actual conception date may vary based on individual cycle variations and other factors.

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