Enter your last menstrual period or due date to instantly see how far along you are, your trimester, and your estimated due date.
About This Pregnancy Week Calculator
This tool functions as a pregnancy week calculator, gestational age calculator, and a pregnancy calendar by due date all in one. It accurately estimates how many weeks and days you’ve been pregnant using either:
- Last Menstrual Period (LMP)
- Estimated Due Date (EDD)
It also works as a pregnancy week calculator by LMP, giving a clear timeline of your current position in pregnancy and how much time remains until birth.
Using the standard 280-day gestational model, the calculator determines:
- Your gestational age
- Trimester stage
- Estimated due date
- Days remaining
- Progress percentage
- A simple week-by-week progression table
The tool is designed to help users understand their pregnancy timeline with clarity and confidence.
Example Calculation
Calculation Based On: Last Menstrual Period (LMP)
- LMP: 08/10/2025
Pregnancy Week Summary
| Category | Result |
|---|---|
| Gestational Age | 5 weeks 6 days |
| Trimester | First Trimester |
| Estimated Due Date | 15 Jul 2026 |
| Days Remaining | 239 days |
| Pregnancy Progress | 14.6% completed |
This format gives a clean snapshot of where the pregnancy currently stands and how far there is to go.
How This Calculator Helps
This tool is useful for anyone who wants to:
- Understand their pregnancy progress at any stage
- Know which trimester they’re currently in
- Track fetal development week by week
- Plan appointments, ultrasounds, and screenings
- Follow pregnancy milestones with better clarity
- Convert LMP to due date or due date to gestational age
It works well for personal tracking, prenatal planning, and everyday pregnancy management.