Pregnancy Due Date & Development Calculator

Welcome to our all-in-one Pregnancy Calculator, a tool designed to guide you through your exciting journey to parenthood. More than just a simple due date finder, this calculator provides a complete timeline of your pregnancy, including key milestones and a fun, week-by-week look at your baby's development. All calculations are performed instantly and privately in your browser.

How It Works

We understand that every pregnancy journey is unique, which is why our tool offers three different methods to calculate your timeline with accuracy and flexibility:

  1. By Last Menstrual Period (LMP): The most common method. Simply enter the first day of your last period and your average cycle length for a personalized calculation.
  2. By Known Due Date: If you already have a due date from your doctor, you can enter it here to see your full timeline and current progress.
  3. By Ultrasound: For a highly accurate estimate, enter your ultrasound date along with the gestational age (weeks and days) measured at that time.

Key Features

  • Flexible & Accurate Calculations: Choose from three different methods (LMP, Due Date, or Ultrasound) to find your timeline.
  • Complete Pregnancy Overview: Instantly see your estimated due date, current gestational age (weeks and days), approximate conception date, and current trimester.
  • Interactive Pregnancy Timeline: A visual progress bar shows you exactly where you are in your 40-week journey at a glance.
  • Fun & Engaging Weekly Development Tracker: This is our most loved feature! Each week, discover:
    • Your baby's approximate size, compared to a familiar fruit or vegetable (e.g., "a poppy seed," "an avocado," "a small watermelon").
    • A key development highlight for that week, represented by a fun icon.
  • Private and Secure: All information is processed on your device. Your personal data is never sent to a server.
  • Light & Dark Mode: A beautiful interface with themes to ensure your comfort, day or night.

How to Use the Calculator

  1. Step 1: Select Your Calculation Method
    Choose the method that works best for you from the dropdown menu (LMP, Due Date, or Ultrasound).
  2. Step 2: Enter Your Information
    The correct input fields will appear. Fill in the required dates and other details.
  3. Step 3: Calculate Your Timeline
    Click the "Calculate" button to instantly generate your results.
  4. Step 4: Explore Your Journey
    Review your due date, see your progress on the timeline, and check out what's happening with your baby's development this week!

Find Our Tool

Due Date Calculator, Pregnancy Calculator, Conception Date, Baby Development, Pregnancy Timeline, Gestational Age, Pregnancy Trimesters, Baby Size Fruit, When Am I Due, Ultrasound Calculator.