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    Pregnancy Due Date CalculatorFree Online Health Tool

    Pregnancy Due Date Calculator is a free online health tool. Calculate your estimated due date and track your pregnancy progress week by week.

    Your Information
    Enter your last menstrual period date
    Your Due Date
    Estimated delivery date

    Enter your last period date to calculate your due date

    100% Private100% Private
    InstantInstant
    Any DeviceAny Device
    Free ForeverFree Forever
    How to useHow to use & Tips

    Steps

    1. 1Enter the first day of your last menstrual period
    2. 2Enter your average cycle length (default is 28 days)
    3. 3View your estimated due date and current gestational age
    4. 4See key pregnancy milestones and trimester dates

    Use Cases

    • -Calculate your baby's estimated due date
    • -Track current gestational age in weeks and days
    • -Identify which trimester you're in
    • -Plan prenatal appointments and milestones
    • -Share due date information with family

    About Pregnancy Due Date Calculator

    Everything you need to know about this tool and how to get the most out of it.

    What is Pregnancy Due Date Calculator?

    What is Pregnancy Due Date Calculator?

    A pregnancy due date calculator estimates your expected delivery date (EDD) based on the first day of your last menstrual period (LMP). It also shows your current gestational age, trimester, and key pregnancy milestones.
    How Pregnancy Due Date Calculator Works

    How Pregnancy Due Date Calculator Works

    Enter the first day of your last menstrual period and your average cycle length. The calculator uses Naegele's rule — adding 280 days (40 weeks) to your LMP — adjusted for your cycle length. It then calculates your current gestational age and upcoming milestones.
    Why Use Pregnancy Due Date Calculator?

    Why Use Pregnancy Due Date Calculator?

    Knowing your due date helps you plan prenatal care, prepare for birth, and track your baby's development week by week. The trimester breakdown helps you understand what to expect at each stage of pregnancy.
    Tips

    Tips & Best Practices

    • 1Only about 5% of babies are born on their exact due date — most arrive within 2 weeks before or after
    • 2Your doctor may adjust your due date based on ultrasound measurements
    • 3The first trimester ends at 13 weeks, the second at 27 weeks, and the third continues to 40+ weeks

    Frequently Asked Questions