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Pregnancy Due Date Calculator

Estimate your pregnancy due date, gestational age and important pregnancy dates using the first day of your last menstrual period.

Pregnancy Details

Estimate your due date

Enter the first day of your last menstrual period and your average cycle length.

Enter the first day your last menstrual period started.

Days

28 days is commonly used as the standard cycle length.

Calculation Method

For a 28-day cycle, the estimated due date is calculated as 280 days from the first day of the last menstrual period.

Your estimated due date will appear here

Enter the first day of your last period to estimate your pregnancy due date and current gestational age.

Results Include

Due Date

Estimated

Week + Day

Pregnancy Age

Trimester

Current Stage

Key Dates

Milestones

01

Enter Last Period Date

Select the first day of your last menstrual period.

02

Enter Cycle Length

Enter your average menstrual cycle length.

03

View Due Date

See estimated due date, pregnancy week and key dates.