Pregnancy Calculator

Obstetricians and gynecologists worldwide utilize standardized methodologies to track pregnancy timelines. The most universally accepted algorithm is known as Naegele's Rule, which estimates your expected due date based on the first day of your Last Menstrual Period (LMP) and the average length of your menstrual cycle.

Here you can instantly calculate your pregnancy milestones. By inputting the date of your last period and your typical cycle length (accommodating variations from 20 to 45 days), the tool instantly processes the data. You will see your estimated due date, your current pregnancy week and day, your current trimester, and the remaining days until the due date. Upholding your privacy, all dates and calculations are processed entirely within your local browser, meaning your reproductive data is never transmitted over the internet. This tool is completely free to use and requires no registration.

It is important to note that the estimated due date is exactly that – an estimate. Only a small percentage of babies are born precisely on their calculated due date, with a two-week window before or after considered completely normal. This tool is provided for informational purposes only and does not substitute professional medical advice or prenatal care.