Find the current pregnancy trimester, stage and months remaining.
Gestational age is mapped to its trimester (roughly 13-week blocks), the weeks left until 40 are counted, and the pregnancy month is derived. Trimesters gate which tests, scans and symptoms are typical, so identifying the stage supports timely prenatal planning.
Pregnancy Trimester
Trimester: 1-13, 14-27, 28-40 weeks; month = weeks / 4.345
Trimester: 1-13, 14-27, 28-40 weeks; month = weeks / 4.345 Gestational age is mapped to its trimester (roughly 13-week blocks), the weeks left until 40 are counted, and the pregnancy month is derived.
Trimesters gate which tests, scans and symptoms are typical, so identifying the stage supports timely prenatal planning.
This calculator takes 1 input: Gestational age. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.