How this estimate works
This date starts from the first day of your last period, adds 280 days, and adjusts for your usual cycle length. It is the same starting point doctors and hospitals use before a scan refines it.
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Due date calculator
See your estimated due date and how far along you are. Takes about a minute.
Your details
The number of days from the start of one period to the start of the next. Around 28 is average.
Pick your last period's start date to see your due date.
Live result
Your due date and pregnancy week will appear here.
This is an estimate based on the date and cycle length entered. A first-trimester dating scan is usually the preferred way for a doctor to confirm pregnancy dates.
Your scan may fine-tune this
An early pregnancy scan, ideally in the first trimester, measures the baby directly and can shift the due date by a few days. When the scan and the calendar disagree, doctors usually trust the early scan.
A window, not a deadline
Only about one baby in twenty arrives on the exact due date. Most arrive in the two weeks around it, so it helps to think of a due window rather than a single day.
What your stage means
Each trimester brings its own checkups, scans and questions. Knowing your week helps you and your doctor plan the right care at the right time, from early blood tests to growth scans later on.
Starting care early helps
If you have not yet seen a doctor for this pregnancy, the first visit is worth booking soon. Early care is when folic acid, basic tests and a dating scan do the most good.
You do not have to figure this out alone.
Share what is going on, and a gynecologist will look at your whole picture. Clear answers, a calm plan, no judgment.
Dr. Geeta S K · Gynecologist, 11 years in practice
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