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How Many Weeks
Pregnant Am I?

Enter your last period date and instantly see your pregnancy week, due date, baby size, and what's happening right now.

New pregnancy guide: Learn how weeks are counted, what each trimester means, and how to interpret your calculator results for better preparation and planning. Read the full guide

Use the first day your period began. Don't worry if you're not 100% sure — an approximate date works fine.

Most cycles are 28 days. Adjust if yours is shorter or longer.

⏱️ Contraction Timer

Track frequency and duration. How to use: Tap when a contraction starts, then tap again when it ends. We'll calculate the intervals for you.

0s Duration
-- Interval
Actionable Guide (The 5-1-1 Rule):
  • 5: Contractions are 5 mins apart.
  • 1: Each lasts for 1 full minute.
  • 1: Pattern is consistent for 1 hour.
  • Urgent: If water breaks or you are bleeding, head to the hospital regardless of the 5-1-1 rule.

Frequently Asked Questions

When should I start timing contractions?
Start timing when you feel regular, painful tightening of your uterus (contractions) that aren't relieved by drinking water or resting.
What is the 5-1-1 rule?
The 5-1-1 rule is the standard guideline for when to go to the hospital: your contractions are 5 minutes apart, each lasting 1 minute, and this pattern has been consistent for 1 full hour.
What is the difference between duration and frequency?
Duration is how long a single contraction lasts (from start to finish). Frequency (or interval) is the time from the start of one contraction to the start of the next one.
Are Braxton Hicks contractions real labor?
No. Braxton Hicks contractions are 'practice' contractions. They are typically irregular, don't get closer together over time, and often go away if you change positions or drink water. Real labor contractions get stronger, longer, and closer together.