Conception Calculator
Calculate your conception date based on your due date or last menstrual period. This calculator helps you determine when conception likely occurred and provides a pregnancy timeline.
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Conception Date Results
Estimated Conception Date
This is when fertilization most likely occurred
Key Dates
Pregnancy Timeline
Important Notes:
- Conception typically occurs 11-21 days after the first day of your last period
- Ovulation usually happens 14 days before your next period
- Pregnancy is calculated from the first day of your last menstrual period (LMP)
- Actual conception date may vary by 1-2 days from the estimated date
- Ultrasound dating in early pregnancy provides the most accurate due date