Pregnancy

How Many Weeks Pregnant Am I?

Built by Kevin Glover · @gloverbuilds · Verified formula

Enter the first day of your last period to see exactly how many weeks and days pregnant you are right now.

📅 Updated April 2026 ✅ Formula verified 📖 4 min read 🆓 Free · No sign-up

In this article

How Pregnancy Weeks Are Counted
Week-by-Week Development

Berechnung

Wochen zaehlen ab dem 1. Tag der letzten Periode (DUM). Empfaengnis: ca. Woche 2. Trimester: 1. (W1-12), 2. (W13-27), 3. (W28-40). 80% werden zwischen W38-42 geboren. Vorsorgeuntersuchungen (U-Heft) dokumentieren den Verlauf.

Meilensteine

1. Tri: Organbildung, Herzschlag W6. 2.: Bewegungen W18-22. 3.: Lungenreife, Gewichtszunahme.

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How many weeks pregnant calculator gets 100K+ monthly searches. Users return weekly to check their progress, creating excellent repeat visitor rates. This page naturally cross-links to due date, weight gain, and baby milestone calculators — driving strong session depth.

Frequently asked questions

Wie berechne ich meine Woche?▾

Heute minus 1. Tag letzte Periode / 7 = Wochen.

Trimester?▾

1.: W1-12. 2.: W13-27. 3.: W28-40.

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Kevin Glover · @gloverbuilds

Founder, CalcWolf · GLVTS · Blickr

All formulas sourced from primary references — IRS publications, peer-reviewed research, and official standards. Results are tested against independent reference calculators before publishing. Rates and brackets updated when official sources change. Editorial policy →