Calculate Your Due Date

Your Estimated Due Date

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Congratulations! Based on your information, here’s your pregnancy timeline:

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Weeks Pregnant
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Days Pregnant
1st
Trimester
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Conception Date

How to Use This Tool

Introduction

This Pregnancy Due Date Calculator helps expectant parents estimate their baby’s arrival date. Using the standard Naegele’s Rule, it calculates your due date based on the first day of your last menstrual period. While this tool provides a reliable estimate, always consult with your healthcare provider for medical advice.

How to Use

Simply enter the first day of your last menstrual period and select your average cycle length. Click “Calculate Due Date” to see your estimated due date, current pregnancy progress, and other important dates. For irregular cycles, use the average length over the past 3-4 months for best results.

Features

  • Accurate due date calculation using medical standard formula
  • Pregnancy week and day counter for tracking progress
  • Trimester identification (1st, 2nd, or 3rd trimester)
  • Estimated conception date calculation
  • Responsive design that works on all devices
  • No data storage – your privacy is protected
  • Clear visual presentation of pregnancy timeline

Use Cases

  • Expecting parents planning for their baby’s arrival
  • Healthcare providers offering quick estimates to patients
  • Fertility tracking and pregnancy planning
  • Understanding pregnancy milestones and timeline
  • Preparing for prenatal appointments with estimated dates

Security & Privacy

Your data security is our priority. This calculator runs entirely in your browser – no information is sent to any server or stored anywhere. All calculations happen on your device, ensuring complete privacy for your personal health information.

Frequently Asked Questions

How accurate is this due date calculator?
This calculator uses the standard medical formula (Naegele’s Rule) and is about 95% accurate for women with regular cycles. However, only about 5% of babies are born on their exact due date, so consider it an estimate.
What if I don’t know my last menstrual period date?
If you’re unsure of your LMP, you can estimate based on when you think you might have conceived or consult with your healthcare provider for an ultrasound dating scan, which is more accurate in early pregnancy.
Can I use this calculator for IVF pregnancies?
For IVF pregnancies, the calculation is different. Your due date should be calculated from the date of embryo transfer, not your LMP. Consult your fertility specialist for an accurate due date.
Why does cycle length matter in due date calculation?
Cycle length affects ovulation timing. Women with longer cycles ovulate later, which can shift the due date. The standard calculation assumes a 28-day cycle, so we adjust for different cycle lengths.