Pregnancy Week Calculator – Free Due Date & Pregnancy Tracker
Calculate your current pregnancy week and due date. Enter your last menstrual period (LMP) or due date to track your pregnancy progress, trimester, and estimated conception date.
Choose input method
Select either last menstrual period (LMP) or your estimated due date.
Enter the date
Input your LMP date or due date using the date picker.
View pregnancy progress
Get current week, day, trimester, days remaining, and key dates instantly.
Know your exact week
Track pregnancy progress down to the day with week and day display.
Trimester awareness
Understand which trimester you're in for symptom and milestone tracking.
Days countdown
See how many days remain until your due date.
Key date reference
Get LMP, conception, and due dates all in one place.
Auto-updates daily
Calculator shows real-time progress based on today's date.
How is pregnancy week calculated?
Count weeks from the first day of your last period. Each week is 7 days. Week 1 starts on your LMP, not conception.
Why count from LMP instead of conception?
LMP is easier to identify than conception. Ovulation typically occurs around day 14, so conception happens about 2 weeks after LMP.
What trimester am I in at 15 weeks?
Weeks 13-26 are second trimester. At 15 weeks, you're in the second trimester, often when morning sickness improves.
When is full term pregnancy?
Full term is weeks 37-42. Babies born before 37 weeks are considered premature. After 42 weeks is post-term.
How accurate is the pregnancy week calculator?
Very accurate for dating if you know your LMP. Ultrasound in first trimester can refine dating if cycles are irregular.
Try our other pregnancy tools: the pregnancy due date calculator for estimating delivery, the pregnancy weight gain calculator for healthy guidelines, and the ovulation calculator for conception timing.
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