Pregnancy Calculator – Due Date, Trimester & Week Tracker
Find your estimated due date, how many weeks pregnant you are, your current trimester, and upcoming pregnancy milestones — based on your last menstrual period.
Results
What is this tool?
A free Pregnancy Calculator estimates your due date (EDD) and tracks key pregnancy milestones based on the first day of your last menstrual period (LMP) using Naegele's Rule. It shows your current gestational week, trimester, and upcoming medical checkpoints. Expectant parents and midwives use it for planning appointments, understanding fetal development stages, and counting down to the due date.
How to use this tool?
1. Enter the first day of your last menstrual period (LMP)
2. Optionally adjust the average cycle length if it differs from 28 days
3. Click "Calculate" to generate your due date estimate
4. View your current gestational week and trimester
5. Review important pregnancy milestones and their expected dates
6. Note: always confirm your due date with a healthcare provider via ultrasound