Side-by-side comparison helps you choose the right calculator for a specific clinical question.
Obstetrics
Calculate gestational age in weeks and days from your last menstrual period (LMP). Instantly see trimester, estimated due date, and days remaining. Free and accurate.
Formula
Gestational Age = days since LMP. EDD = LMP + 280 days (Naegele's rule).
Inputs
Obstetrics
Calculate your estimated due date (EDD) from your last menstrual period using Naegele's rule. Track gestational age and trimester.
Formula
EDD = LMP + 280 days (Naegele's Rule)
Inputs