Pregnancy Due Date Calculator
Estimate your due date and current week of pregnancy
Enter the first day of your last period to calculate.
Based on a standard 280-day (40-week) estimate from your last period. Actual due dates vary — your healthcare provider's estimate (especially from an early ultrasound) is more accurate than this calculation alone.
What is this tool?
Estimates a pregnancy due date based on the first day of your last menstrual period, using the standard 280-day estimation method.
How to use it
Enter the first day of your last menstrual period, and an estimated due date is calculated.
This is a standard estimate used as a starting reference point — an ultrasound-based estimate from your care provider is generally more accurate for your actual situation, especially if your cycle isn't a typical 28 days.
Watch: Pregnancy Due Date Calculator in Action
Watch on YouTubePlays on YouTube (counts toward our @freedailypro channel).
Frequently asked questions
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