🩷 Conception Date Calculator

Ever wondered when conception might have happened? Our Conception Date Calculator helps you estimate that important day based on your due date or the first day of your last period. It’s simple, private, and your data stays saved for next visits.

🌸 How It Works

Typically, conception occurs about two weeks after the start of your last menstrual period. If you already know your due date, you can estimate the conception date by subtracting 38 weeks. This calculator simplifies the math for you.

Example: If your due date is January 20, 2026, your likely conception date was around April 29, 2025.

💡 Practical Tips

• This calculator gives an estimate — every pregnancy is unique.
• Use it to plan memory moments like your baby’s “conception anniversary”.
• Your data is stored locally on your device — no sharing, no worries.

❓ FAQ

Can I use this even if my cycle is irregular?

Yes, but results will be more accurate if you know your approximate ovulation date.

Does this mean the exact day of conception?

Not exactly — it’s an estimate within a few days, since sperm can survive for several days before fertilization.

Is my information saved?

Yes! Your selected dates are saved in your browser’s local storage for your convenience.

Disclaimer: This tool is for informational and personal planning purposes only and should not replace professional medical consultation.