Due Date Calculator Using Implantation Date
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Use this calculator to determine your estimated due date based on the date of conception or implantation.
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Calculate Due Date
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Estimated Due Date:
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How It Works
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The due date is typically calculated by adding 266 days (38 weeks) to the date of conception. Since the exact date of conception is often unknown, the date of implantation is used as a close approximation.
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Frequently Asked Questions
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How accurate is the due date calculated from implantation date?
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The due date calculated from implantation date is generally quite accurate, as implantation typically occurs 6-12 days after fertilization. Adding 38 weeks to this date provides a reliable estimate.
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Can I use my last menstrual period (LMP) instead?
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Yes, if you know your LMP, you can use the standard Naegele’s rule: add 1 year, subtract 3 months, and add 7 days. However, if you know your implantation date, it provides a more precise calculation.
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Related Tools
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- Pregnancy Calculator
- Ovulation Calculator
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