A pregnancy calculator estimates your due date, current gestational age, and trimester based on your last menstrual period (LMP) or conception date. Pregnancy lasts approximately 40 weeks (280 days) from the LMP, though normal term is considered 37–42 weeks.
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Pro Tip
The first trimester is the most critical for fetal development. Folic acid supplementation (400–800 mcg/day) before and during early pregnancy significantly reduces neural tube defect risk.
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Did You Know?
Only about 4% of babies are born exactly on their due date. Most births occur within 2 weeks before or after.
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