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Conception Date Calculator

Estimate conception date

conceptionfertilization

📖 How to Use

  1. Choose input method (last period or due date)
  2. Enter the date
  3. Click Calculate to see the estimated conception date

📐 Formula

Conception ≈ last period + 14 days
Conception ≈ due date − 266 days (38 weeks)

❓ FAQ

How accurate is the conception date?▾
It's an estimate — actual conception can occur within a 2–3 day window around ovulation.

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About Conception Date Calculator

This tool is completely free, no registration required. Works directly in your browser. Supports both PC and mobile devices.

Conception Date Calculator is a free online tool that works on both PC and mobile. No registration or download required — just open in your browser. Results are accurate and reliable for everyday use and professional reference.