Weeks Pregnant Calculator
Quick answer: Enter your LMP date to find gestational age in weeks and days, trimester, and due date.
Enter the first day of your last menstrual period (LMP) to instantly find out how many weeks and days pregnant you are, which trimester you are in, your estimated due date, and how far along your pregnancy is.
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Last reviewed: April 2026Report an error
Weeks Pregnant
10w 0d
You are 10 weeks and 0 days pregnant. 1st Trimester (Weeks 1–13). Due date: December 15, 2026. 210 days to go.
Gestational Age
10w 0d
Trimester
1
of 3
Due Date
December 15, 2026
Days Until Due
210
Week 025.0% completeWeek 40
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How to Use This Weeks Pregnant Calculator
- 1Enter the first day of your last menstrual period (LMP).
- 2Optionally adjust your average cycle length (default 28 days).
- 3Read gestational age in weeks and days, your current trimester, and estimated due date.
Frequently Asked Questions
- Gestational age is counted from the first day of your last menstrual period (LMP), not from conception. Full term is 40 weeks (280 days) from LMP.
- First trimester: weeks 1–13. Second trimester: weeks 14–27. Third trimester: weeks 28–40.
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