Calculate your pregnancy due date from your last menstrual period (LMP). See your current week, trimester, baby size comparison (fruit analogy), and a timeline of key milestones from first heartbeat to full term.
Enter the first day of your last period to calculate your due date.
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The due date is calculated by adding 280 days (40 weeks) to the first day of your last menstrual period (LMP), known as Naegele's rule.
Only about 5% of babies are born on their exact due date. Most arrive within two weeks before or after.
First trimester: weeks 1-12. Second trimester: weeks 13-26. Third trimester: weeks 27-40.
Yes, the Pregnancy Due Date Calculator is fully responsive and works perfectly on smartphones, tablets, and desktop computers. Simply open NexTool in your mobile browser and navigate to the tool — no app download required.
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Calculate your pregnancy due date from your last menstrual period (LMP). See your current week, trimester, baby size comparison (fruit analogy), and a timeline of key milestones from first heartbeat to full term.
NexTool's Pregnancy Due Date Calculator is completely free to use with no sign-up required. Your data is processed directly in your browser and never sent to our servers, ensuring complete privacy and instant results.
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