👶 Gestational Age Calculator
Enter the first day of your last menstrual period (LMP) to calculate your gestational age, estimated due date, and current trimester.
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About Gestational Age
How is gestational age calculated?
Healthcare providers typically calculate gestational age from the first day of your last menstrual period (LMP). This is because it's often difficult to pinpoint the exact date of conception. Pregnancy is considered to be 40 weeks (280 days) from the LMP.
What if my cycle is irregular?
If you have irregular cycles, calculating from your LMP might be less accurate. In these cases, an early ultrasound is the most reliable way to determine gestational age and your estimated due date.