Crown-Rump Length (CRL)

Crown-Rump Length (CRL): a simplified educational model, not the official method. Not for diagnosis or dosing; the result does not replace a doctor's advice.

⚠ Simplified model, not a medical tool

This calculator does not reproduce the official Crown-Rump Length (CRL) method and uses a simplified scheme instead. Do not use the result for diagnosis, dosing or treatment decisions. This assessment should be made by a clinician.

Crown-Rump Length (CRL)

Gestational age, wk

CRL

178.4884mm

Calculate Crown-Rump Length (CRL) instantly with the exact formula and a worked example.

FAQ

How accurate is the Crown-Rump Length (CRL) calculator?

It is a simplified model. It does not reproduce the official Crown-Rump Length (CRL) score or formula, so the result can differ considerably from a clinical assessment.

Can I use the result for diagnosis or dosing?

No. Do not use the result for diagnosis, dosing or treatment. This assessment should be made by a clinician following the official protocol.

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