Pregnancy Due Date Calculator
Estimate your baby's due date and track your pregnancy progress based on your last period.
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Due date
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Weeks
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Progress
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Enter last period date
How this tool works
What it accepts, how to use it, and where your input is processed.
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How this tool works
What it accepts, how to use it, and where your input is processed.
Show GuideHide Guide
Planning for a new arrival? Our Online Due Date Calculator uses Naegele's Rule, the standard medical method for estimating the 40-week gestation period.
Pregnancy Milestones:
- First Trimester: Weeks 1-12. Crucial developmental phase.
- Second Trimester: Weeks 13-26. The "golden period" of pregnancy.
- Third Trimester: Week 27 to birth. Final preparation for delivery.
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