Pregnancy Week Tracker
See exactly how many weeks and days pregnant you are, which trimester you’re in, and what’s happening with your baby this week.
Weeks are counted from the first day of your last period. Sizes are approximate. Your provider’s dating scan is the most accurate reference.
How it works
Each week brings new development, from a first heartbeat to tiny kicks you can feel. This tracker shows your progress through the 40-week journey along with a friendly note about what’s typically happening at your stage.
How this is calculated
Gestational age is counted from the first day of your last period (or your due date minus 280 days) — not from conception, which is about 2 weeks later.
The fruit and vegetable size comparisons are rough, friendly averages; healthy babies vary a lot week to week.
Last reviewed: 2026-06
Frequently asked questions
How many weeks pregnant am I? +
Pregnancy is counted in weeks from the first day of your last period. Enter that date (or your due date) and we’ll show your current week and day, plus your trimester.
When does each trimester start? +
The first trimester is weeks 1–13, the second is weeks 14–27, and the third is weeks 28 until birth. Most pregnancies last about 40 weeks.
Why does the tracker count from my last period? +
Conventionally, pregnancy weeks are measured from the first day of your last menstrual period — about two weeks before conception actually occurs. This is the standard your provider uses too.
Related reading
- The Three Trimesters of Pregnancy, ExplainedA calm guide to the three trimesters of pregnancy — the week ranges for each, what happens to you and your baby, and the key checkups to expect along the way.Jun 3, 2026 · 4 min readRead more→
- 38 Weeks Pregnant: What to Expect (and What to Watch For)At 38 weeks you’re nearly full term. Here’s what’s normal, the early signs labor may be near, and the warning signs that mean you should call your provider.Jun 2, 2026 · 4 min readRead more→
- Early Signs of Pregnancy (Before a Missed Period)The earliest signs of pregnancy — from tender breasts to fatigue — why they overlap with PMS, what implantation bleeding looks like, and exactly when to test.May 30, 2026 · 6 min readRead more→
- The First Trimester: What to Expect (Weeks 1–13)A calm guide to the first trimester — common symptoms, key milestones like the first scan, what’s safe, and when to call your provider in early pregnancy.May 30, 2026 · 5 min readRead more→
- How Many Weeks Pregnant Am I? (And How Pregnancy Is Counted)Pregnancy is counted in weeks from your last period, not conception. Here’s how to work out how many weeks pregnant you are and which trimester you’re in.May 30, 2026 · 5 min readRead more→
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