FREE HEALTH TOOL
Pregnancy Due Date Calculator
Calculate your estimated pregnancy due date from your last menstrual period. See key milestones and trimester dates.
Based on a standard 40-week (280-day) pregnancy from LMP.
Why Use Our Pregnancy Due Date Calculator?
Standard 40-Week Calculation
Calculates your due date by adding 280 days to your last menstrual period date, the standard clinical method.
Trimester Tracking
Automatically shows which trimester you are currently in based on today's date.
Current Week Display
Shows your current pregnancy week so you can follow along with weekly guides and apps.
Six Key Milestones
Lists first trimester end, anatomy scan, second trimester end, early term, full term, and due date with exact calendar dates.
Days Remaining Countdown
Shows exactly how many days remain until your estimated due date.
No Sign-up Required
Open and get your results immediately with no account or personal data required.
Frequently Asked Questions
How is the due date calculated?
The due date is estimated by adding 280 days (40 weeks) to the first day of your last menstrual period (LMP). This is the standard clinical method used worldwide.
How accurate is this due date?
The estimated due date is accurate within a statistical range. Only about 5% of babies are born on their exact due date. Most births occur within 2 weeks before or after.
What is an anatomy scan?
The anatomy scan is a detailed ultrasound performed around week 20 to check the baby's development, organs, and gender if desired.
What do the trimester dates mean?
The first trimester runs weeks 1-12, the second from weeks 13-27, and the third from week 28 until birth. Each trimester has different developmental milestones.
What does full term mean?
A pregnancy is considered full term at 39 weeks. Babies born between 37-38 weeks are early term. The due date is at 40 weeks.
Is my data private?
Yes. Your date is never sent to any server. All calculation happens locally in your browser.
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