π€° Due date calculator
Calculate the estimated due date based on the last menstrual period.
β οΈ Only 5% of births happen on the estimated date - most occur between 38 and 42 weeks. This estimate doesn't replace regular medical care.
How it works
Naegele\'s rule: due date = LMP + 280 days (40 weeks). If your cycle differs from 28 days, we add/subtract the difference. With known conception date, the calculation becomes LMP + 266 days.
Fun facts
- About 180,000 babies are born each year in Romania.
- Your baby will blink for the first time around 22 weeks.
- Hearing develops at 18 weeks - you can sing to them.