Pregnancy Calculator
Estimate your due date, current pregnancy week, and trimester from your last menstrual period and average cycle length.
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Medical disclaimer: This calculator is for educational purposes only and is not medical advice. Always consult a qualified healthcare professional.
About the Pregnancy Calculator
Pregnancy is traditionally measured from the first day of your last menstrual period (LMP), not from conception. The standard term is 280 days (40 weeks) from LMP, adjusted slightly if your cycle is shorter or longer than 28 days.
This calculator uses the LMP and your cycle length to project a due date, then computes how many weeks and days into pregnancy you currently are, plus which trimester that falls into.
Frequently asked questions
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