About This Pregnancy Due Date Calculator
Our free pregnancy due date calculator uses Naegele's rule to estimate when your baby will arrive. Whether you know your last menstrual period (LMP) date or conception date, this tool provides an accurate estimate of your due date, current pregnancy week, trimester, and days remaining. The calculator follows the standard 280-day (40-week) pregnancy timeline from LMP or 266 days from conception.
Features
Calculate due date from last menstrual period (LMP)
Calculate due date from conception date
Automatic conception date estimation from LMP
Current pregnancy week and day calculation
Trimester identification (1st, 2nd, or 3rd)
Days and weeks remaining until due date
Visual pregnancy progress bar
Percentage of pregnancy completed
Mobile-friendly interface
Instant results as you type
Benefits
Accurately estimate your baby's arrival date
Track your pregnancy progress week by week
Know which trimester you're in
Plan for important pregnancy milestones
Prepare for doctor's appointments
Share due date with family and friends
Calculate from LMP or conception date
Free and no registration required
Privacy-focused - all calculations in your browser
Works on all devices
Common Use Cases
First-time pregnancy due date calculation
Tracking multiple pregnancies
Planning maternity leave
Scheduling prenatal appointments
Preparing nursery and baby supplies
Informing family about due date
Calculating conception date estimate
Monitoring pregnancy milestones
Planning baby shower timing
Coordinating with healthcare providers