What is Gestational Age?
Gestational age calculation helps determine pregnancy progress and due date. It's crucial for monitoring fetal development, scheduling prenatal tests, and ensuring proper pregnancy care. Our calculator uses medical-standard formulas to provide accurate results instantly.
Calculate Your Gestational Age
Calculation Formula
Gestational Age = (Current Date - LMP Date) + 14 days
Standard medical formula adding 14 days to account for typical ovulation period. This method assumes regular 28-day cycles.
Gestational Age Calculation Methods
| Method | Accuracy | When Used |
|---|---|---|
| LMP Calculation | High (regular cycles) | First Trimester |
| Ultrasound Dating | Very High | All Trimesters |
| Fundal Height | Moderate | Second/Third Trimester |
Pros and Cons
Advantages:
- Non-invasive and immediate results
- Helps track fetal development milestones
- Essential for prenatal care planning
- Identifies high-risk pregnancies early
- Cost-effective first assessment method
Limitations:
- Less accurate for irregular cycles
- Doesn't account for conception variations
- Requires precise LMP recall
- Should be confirmed with ultrasound
- Doesn't detect multiple pregnancies
FAQs
1. How accurate is LMP-based gestational age calculation?
The LMP method is 85-90% accurate for women with regular cycles. Irregular periods or cycle variations require ultrasound confirmation for precise dating.
2. Can I use this calculator if I don't know my LMP?
For unknown LMP, ultrasound measurement is necessary. Our calculator requires LMP input for accurate conventional calculation.