Gestational Age Calculator
Calculate current gestational age in weeks and days
About this calculator
A Gestational Age Calculator helps determine how far along a pregnancy has progressed by calculating the exact number of weeks and days since conception or the last menstrual period. This tool is essential for expectant parents and healthcare providers to track fetal development milestones, schedule important prenatal appointments, and estimate the due date. Accurate gestational age calculation ensures proper monitoring of pregnancy progress and helps identify the optimal timing for various medical screenings and tests throughout the pregnancy journey.
How to use
Enter the first day of your last menstrual period (LMP) or conception date into the calculator. The tool will automatically calculate your current gestational age in weeks and days based on today's date. Some calculators may also provide your estimated due date and trimester information for comprehensive pregnancy tracking.
Frequently asked questions
What's the difference between gestational age and fetal age?
Gestational age counts from the last menstrual period, while fetal age counts from conception. Gestational age is typically 2 weeks longer than fetal age.
How accurate is gestational age calculation?
Calculations based on LMP are generally accurate within 1-2 weeks, though ultrasound measurements in early pregnancy provide the most precise dating.
When should I use conception date instead of LMP?
Use conception date if you know the exact date of ovulation or conception, or if you have irregular menstrual cycles that make LMP unreliable.