BrainyCalculators
Login
Advertisement

🤱 Pregnancy Week Calculator

Enter your last menstrual period (LMP) date or current gestational week to track your pregnancy progress, trimester, and key milestones.

Due date is calculated as LMP + 280 days (Naegele's Rule)

Pregnancy Trimesters

First Trimester Weeks 1–12

Major organ development. Morning sickness common. First heartbeat detectable around week 6.

Second Trimester Weeks 13–26

Baby starts moving (quickening). Anatomy scan around week 20. Most comfortable trimester for many.

Third Trimester Weeks 27–40

Rapid growth. Baby gains most weight. Lungs mature. Full term at 39–40 weeks.

'Full term is 39–40 weeks. Early term is 37–38 weeks, late term is 41 weeks, and post-term is 42+ weeks. Most OBs prefer not to let pregnancy go beyond 42 weeks and will discuss induction options at that point.'], ]" />

Related Calculators

🍼 Health

Due Date Calculator

Calculate your estimated due date from last menstrual period or conception date.

Calculate now
🤰 Health

Pregnancy Calculator

Calculate your due date, conception date, and pregnancy milestones.

Calculate now
📅 Health

Ovulation Calculator

Calculate your ovulation date and fertile window based on your cycle.

Calculate now