Pregnancy Due Date Calculator
Estimate a due date from the first day of the last period or the conception date.
Calculating…
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Calculating…
For general information only — not medical advice. Talk to a doctor or other qualified professional about your health.
How it works
Due date = last period + 280 days + (cycle length − 28) · or conception date + 266 days
Questions
- How does the pregnancy due date calculator work?
- Due date = last period + 280 days + (cycle length − 28) · or conception date + 266 days.
- What do I need to enter?
- Based on, Date, Cycle length. Optional fields can be left blank.
- Does it use today's date?
- Yes — blank date fields use today's date on your device.
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