Pregnancy Due Date Calculator
Estimate your due date using Naegele’s rule from your last menstrual period
Your Details
Results
Estimated Due Date
—
Gestational Age
—
Time Remaining
—
Progress to 40 Weeks
Related Tools
Frequently Asked Questions
How accurate is the due date?
Only about 5% of babies are born on their exact due date; most arrive within a week of it either side.
What if I don’t know my LMP?
An ultrasound dating scan provides an alternative estimate based on fetal measurements, which your doctor can use instead.
What counts as full-term?
A full-term pregnancy is considered anywhere between 37 and 42 weeks of gestation.
Why does the due date matter?
It helps track developmental milestones through pregnancy and schedule the necessary prenatal tests and checkups.