Gestational Age Calculator
Calculate precise pregnancy age and track fetal development
Calculate Gestational Age
Medical Disclaimer
This calculator provides estimates based on standard pregnancy calculations. Actual gestational age and due dates should always be confirmed by qualified healthcare providers using clinical assessment and ultrasound dating. Individual pregnancies may vary significantly.
Calculation Methods
Due Date Method
EDD - 280 days = LMP, then calculate GA
LMP Method
Most common - from last menstrual period
Conception Method
Known fertilization date + 14 days
Ultrasound Method
Most accurate for dating in early pregnancy
Pregnancy Trimesters
Key Milestones
Understanding Gestational Age
What is Gestational Age?
Gestational age (GA) is the age of a pregnancy measured from the first day of the woman's last menstrual period (LMP). It's typically expressed in weeks and days and is the standard method for tracking pregnancy progress.
Why It Matters:
- • Monitors fetal development
- • Schedules prenatal care
- • Interprets prenatal tests
- • Determines delivery timing
- • Classifies pregnancy outcomes
Calculation Methods
Different methods exist for calculating gestational age, each with specific use cases and accuracy levels. Ultrasound dating is most accurate in early pregnancy, while LMP dating is most commonly used.
Formula Overview:
- • LMP: Current date - LMP date
- • Due Date: EDD - 280 days = LMP
- • Conception: Days since conception + 14
- • Ultrasound: US GA + days since scan
Clinical Applications
Prenatal Care
- • Appointment scheduling
- • Test timing optimization
- • Risk assessment
- • Growth monitoring
Delivery Planning
- • Term classification
- • Intervention timing
- • Risk stratification
- • Care coordination
Research & Statistics
- • Outcome tracking
- • Population studies
- • Quality metrics
- • Comparative analysis