Pregnancy Due Date Calculator Using HTML, CSS and JavaScript with Source Code

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Welcome to the Pregnancy Due Date Calculator – your personalized tool for estimating your baby's arrival date and tracking every important milestone along the way! This interactive web app combines medical accuracy with a beautiful, user-friendly design to help expecting parents navigate their pregnancy journey with confidence. Whether you're just finding out you're pregnant or well into your third trimester, our calculator provides clear, reliable estimates along with helpful tips tailored to your current stage.

Built with modern web technologies (HTML, CSS, and JavaScript), this tool offers multiple calculation methods to suit your needs. Simply enter your information using either your last menstrual period, conception date, or ultrasound details, and instantly receive your estimated due date along with a visual pregnancy timeline, progress tracker, and trimester-specific advice. The clean, responsive design works perfectly on any device, making it easy to check your progress whenever you need reassurance or information about your developing baby.

You may also check this simple HTML, CSS and JavaScript project:

Key Features:

Multiple Calculation Methods
Estimate due date using:

  • Last Menstrual Period (LMP) (Naegele’s rule)

  • Conception Date

  • Ultrasound Dating (gestational age)

Interactive Pregnancy Timeline

  • Visual milestones (ovulation, trimesters, anatomy scan, due date)

  • Color-coded status (completed / current / upcoming)

Pregnancy Progress Tracker

  • Progress bar showing completion percentage

  • Current week & day, remaining days, and trimester

Personalized Tips & Advice

  • Stage-specific recommendations for each trimester

  • General pregnancy wellness tips

Modern & Responsive Design

  • Clean, mobile-friendly UI with smooth animations

  • Card-based layout for easy readability

Technologies Used:

🛠 Frontend:

  • HTML5 – Structure and content

  • CSS3 – Styling, animations, and responsive design

  • JavaScript – Dynamic calculations and interactivity

🎨 Design Elements:

  • Google Fonts (Poppins) – Modern typography

  • Font Awesome Icons – Visual cues for better UX

  • CSS Flexbox & Grid – Layout organization

  • Custom Animations – Smooth transitions

How to Use:

  1. Select a Calculation Method
    Choose between LMP, Conception Date, or Ultrasound Dating.

  2. Enter Required Details

    • For LMP: Input the first day of your last period and cycle length.

    • For Conception Date: Provide the estimated conception date.

    • For Ultrasound Dating: Enter the ultrasound date and gestational age.

  3. Click "Calculate Due Date"
    Instantly see your estimated due date and pregnancy progress.

  4. Explore Results

    • View your due date, trimester, fetal age, and remaining days.

    • Check the interactive timeline for key milestones.

    • Get personalized tips for your current stage.

  5. Reset & Recalculate
    Use the "Reset" button to start a new calculation.

Sample Screenshots of the Project

Landing Page (Last Menstrual Period Page)

Conception Date

Ultrasound Date

Sample Calculation

Image removed.

How to Run?

  • Download the provided source code zip file.
  • Extract the downloaded zip file.
  • Open the html file and you are now ready to go!

Video Demonstration for Installation/Setup:

Conclusion:

In conclusion, the Pregnancy Due Date Calculator offers expecting parents a reliable, beautifully designed tool to estimate their due date and track pregnancy milestones with ease. By combining medical accuracy with an intuitive interface and personalized insights, this web app transforms complex calculations into a simple, engaging experience—helping you stay informed and excited throughout your pregnancy journey.

Remember: while this calculator provides helpful estimates, always consult your healthcare provider for personalized medical advice.

That's it! I hope this "Pregnancy Due Date Calculator Using HTML, CSS and JavaScript" will assist you on your  programming journey, providing value to your current and upcoming projects.

For additional tutorials and free source codes, explore our website.

Enjoy Coding :>>

Note: Due to the size or complexity of this submission, the author has submitted it as a .zip file to shorten your download time. After downloading it, you will need a program like Winzip to decompress it.

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