Enter your LMP, ultrasound results, or due date to instantly estimate gestational age, trimester, and pregnancy progress.
About This Gestational Age Estimator
This tool works as a complete estimate gestational age calculator, offering three reliable ways to determine how far along a pregnancy is. Users can calculate fetal age by entering:
- Last Menstrual Period (LMP)
- Ultrasound scan date + measured gestational age
- Estimated Due Date (EDD)
Each method follows the standard 280-day pregnancy model, providing clear and consistent results.
The calculator displays:
- Gestational age in weeks and days
- Trimester classification
- Estimated due date
- Days remaining in pregnancy
- A percentage-based progress summary
It’s useful for early pregnancy tracking, understanding fetal development timing, and supporting routine prenatal planning.
Example Calculation
Estimate Based On: Last Menstrual Period (LMP)
- LMP: 01/11/2025
Gestational Age Summary
| Category | Result |
|---|---|
| Gestational Age | 2 weeks 3 days |
| Trimester | First Trimester |
| Estimated Due Date | 8 Aug 2026 |
| Days Remaining | 263 days |
| Pregnancy Progress | 6.1% completed |
This layout gives a simple and clear snapshot of pregnancy status, ideal for users who want quick insights without medical complexity.
Why This Calculator Is Useful
The tool helps users:
- Determine gestational age with or without knowing their LMP
- Align their pregnancy timeline with ultrasound findings
- Confirm trimester stages
- Track overall pregnancy progress
- Understand how due dates shift based on measurement methods
It’s especially helpful for those who have irregular cycles, uncertain LMP dates, or rely on ultrasound-based dating.