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Calculators
Health Calculators
OB/GYN & Pregnancy
Crown-Rump Length (CRL) Calculator

CRL Calculator: Ultrasound Dating Tool

Calculate gestational age and estimated due date from crown-rump length (CRL) measurements obtained during first trimester ultrasounds.

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About Crown-Rump Length (CRL) Calculator

The Crown-Rump Length (CRL) Calculator is an essential tool designed to accurately determine gestational age (GA) and estimate the due date (EDD) during the first trimester of pregnancy. This calculator serves healthcare professionals, including obstetricians and sonographers, as well as expectant parents seeking clarity on their pregnancy timeline. By inputting the precise CRL measurement obtained from an ultrasound scan, the tool applies established medical formulas to convert this embryonic or fetal length into a reliable gestational age. It provides critical, early pregnancy dating information, which is fundamental for subsequent prenatal care planning, monitoring fetal development, and ensuring optimal pregnancy management.

Next Steps
Ovulation Tracker
Calculate your ovulation period and identify your most fertile days to increase your chances of getting pregnant. Track your cycle easily.
Fertile Window Calculator
Identify your most fertile days with our Fertile Window Calculator. Pinpoint your ovulation period to maximize your chances of conception.
Pregnancy Due Date Calculator
Estimate your pregnancy due date quickly and easily! Calculate your delivery date based on your last menstrual period (LMP) or IVF transfer date.
Conception Date Calculator
Calculate your estimated conception date using your last period or due date. Get a better understanding of your pregnancy timeline.
Gestational Age Calculator
Calculate your pregnancy week. Simply input your last menstrual period (LMP) to determine how many weeks pregnant you are.
CRL Gestational Age Calculator
Medical Disclaimer
This tool is for educational and screening purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding a medical condition.