Gestational Age from LMP

What this calculator does

This tool calculates how far along the pregnancy is (gestational age) in weeks and days from the first day of your last menstrual period to a reference date (e.g. today).

What your result means

Gestational age is used to track pregnancy progress and plan care. It is often confirmed or adjusted by ultrasound. Your provider will explain how it applies to your pregnancy.

This is not medical advice. A healthcare provider should interpret results in your context.