Due Date Calculator

Calculate your pregnancy due date and track your progress in weeks, trimesters, and more.

Understanding Pregnancy Due Dates

Pregnancy due dates are estimated using the first day of your last menstrual period (LMP) and the average length of your menstrual cycle. The most common method, Naegele's Rule, adds 280 days (40 weeks) to the LMP. However, only about 5% of babies are born on their exact due date. Factors such as irregular cycles, uncertain LMP, and individual variation can affect accuracy. Healthcare providers may use ultrasounds or conception dates for more precise dating.

The due date is a helpful guide for prenatal care, planning, and monitoring fetal development. It also helps schedule important screenings and check-ups throughout pregnancy.

How This Tool Works

The Due Date Calculator uses your LMP and cycle length to estimate your due date, conception date, current week of pregnancy, trimester, and days remaining. It assumes ovulation occurs about 14 days after the LMP for a 28-day cycle. The tool instantly calculates and displays results, helping you track your pregnancy progress and plan ahead.

Adjustments are made for different cycle lengths, and the tool provides a comprehensive overview of your pregnancy timeline. All calculations are performed locally in your browser for privacy and speed.

Key Features

  • Comprehensive Pregnancy Timeline: Get your estimated due date, conception date, current week, trimester, and days remaining.
  • Cycle Length Adjustment: Enter your average cycle length for more accurate results.
  • Instant Results: See your pregnancy details immediately after entering your information.
  • Mobile Friendly: Fully responsive design for smartphones, tablets, and desktops.
  • Privacy First: All calculations are performed locally in your browser.
  • Simple Interface: Clean, intuitive design for easy use by anyone.
  • Accessibility: Supports keyboard navigation and screen readers.

These features make the Due Date Calculator a reliable choice for expectant parents, healthcare professionals, and anyone planning for a new arrival.

Common Use Cases

  • Prenatal Planning: Track your pregnancy progress and prepare for key milestones.
  • Healthcare Visits: Schedule prenatal appointments and screenings based on your pregnancy week.
  • Birth Preparation: Plan for maternity leave, baby showers, and delivery.
  • Educational Purposes: Learn about pregnancy stages and fetal development.
  • Partner and Family Involvement: Share important dates and progress with loved ones.

The calculator adapts to your needs, providing clear, actionable information for every stage of pregnancy.

Step-by-Step Guide

  1. Enter Your Last Menstrual Period (LMP): Use the date picker to select the first day of your last period.
  2. Enter Your Cycle Length: Input your average cycle length in days (default is 28).
  3. Click Calculate: Press the "Calculate Due Date" button to see your results.
  4. Review the Results: View your estimated due date, current week, trimester, days remaining, and conception date.
  5. Reset if Needed: Use the reset button to clear inputs and start over.

For best results, use the tool in a modern browser and ensure your device's date and time settings are correct. Consult your healthcare provider for personalized advice.