Pregnancy Week Calculator
Calculate current week of pregnancy
How to Use
Enter last period date
Input the first day of your last menstrual period (LMP).
View current week
See your current pregnancy week and gestational age.
Check baby development
View baby size comparison and development milestones for your week.
See upcoming weeks
Preview what to expect in the coming weeks of your pregnancy.
Frequently Asked Questions
Why count from the last period?
Pregnancy is dated from the first day of your last menstrual period (LMP), even though conception occurs about 2 weeks later. This is the medical standard.
What are the trimesters?
First trimester: weeks 1-12, Second trimester: weeks 13-27, Third trimester: weeks 28-40.
When will I feel the baby move?
Most women feel movement (quickening) between weeks 16-25. First-time mothers often feel it later than those who've been pregnant before.
Are the size comparisons accurate?
Size comparisons (fruits/vegetables) are approximate averages. Your baby may be larger or smaller depending on various factors.
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