One of the first questions every expecting parent asks is simple: when is the baby actually due? This pregnancy due date calculator estimates your due date based on the first day of your last menstrual period or your conception date, using the same standard method most OB-GYNs rely on for an initial estimate.
Pregnancy Due Date Calculator
Estimate your due date and track your pregnancy timeline instantly based on your last period.
Pregnancy Progress Breakdown
Milestone Summary Table
| Pregnancy Milestone | Estimated Date | Details |
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Keep in mind that only a small percentage of babies actually arrive on their exact calculated due date — it’s an estimate based on averages, not a guarantee — but it’s still an essential number for scheduling prenatal appointments, tracking trimester milestones, and general planning. Many parents also find it useful to track exact time intervals during pregnancy planning, which our date duration calculator can help with for counting weeks between key dates.
Enter the first day of your last period above to get your estimated due date and a general sense of where you are in your pregnancy timeline.