How to Use the Due Date Calculator
Enter the first day of your last menstrual period, and the calculator estimates a due date roughly 280 days later, along with the current estimated week of pregnancy — this is a general estimate for informational purposes and should be confirmed and monitored by a healthcare provider.
The Due Date Calculator provides a general estimate based on standard assumptions — here's what to enter, and an important note on how to use the result.
Entering the last period date
Enter the first day of the most recent menstrual period — the calculator applies the standard 280-day estimation method to project an estimated due date and current gestational week.
Using the result appropriately
This tool provides a general, informational estimate only — it is not a substitute for medical care. Confirming and monitoring an actual due date and pregnancy progress should always be done with a qualified healthcare provider, who can incorporate clinical information this calculator doesn't have access to.