Due Date Calculator

Due date calculator is a simple tool that helps expectant parents estimate their baby’s birth date based on key pregnancy milestones.

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What Is a Due Date Calculator?

A due date calculator is a simple tool that helps expectant parents estimate their baby’s birth date based on key pregnancy milestones. By entering your last menstrual period (LMP) or conception date, you can get an approximate delivery date and track your pregnancy week-by-week.

Why Use a Due Date Calculator?

✅ Plan Ahead – Prepare for your baby’s arrival with a predicted timeline.
✅ Track Pregnancy Progress – Monitor fetal development by week and trimester.
✅ Schedule Prenatal Care – Align doctor visits and important tests.
✅ Calculate Conception Date – Useful for fertility tracking or IVF pregnancies.

How Does a the Calculator Work?

Most calculators use Naegele’s Rule, which estimates your due date as:
Due Date = LMP + 280 days (40 weeks)

Key Inputs Needed:

  • Last Menstrual Period (LMP) – First day of your last period.
  • Conception Date – If known (typically 11–21 days after LMP).
  • Ultrasound Data – For more accuracy in later pregnancy stages.

Note:

Only 5% of babies are born exactly on their due date! Most arrive within 2 weeks before or after.

1️⃣ Pregnancy Weight Gain Calculator – Track healthy weight gain by trimester.
2️⃣ Ovulation Calculator – Predict fertile windows for conception.
3️⃣ Baby Growth Percentile Calculator – Monitor your newborn’s development.