Crown Rump Length (CRL) to Gestational Age Crown Rump Length (CRL) Calculator
Result
Crown Rump Length (CRL) to Gestational Age Crown Rump Length (CRL) Calculator estimates gestational age from fetal crown-rump measurement via ultrasound. CRL is the distance from the top of the fetal head (crown) to the base of the spine (rump), used prim — free online calculator.
Formula
- Crown Rump Length (CRL) to Gestational Age Crown Rump Length (CRL) Calculator calculates its result from CRL (cm). It uses the formula GA (weeks) ≈ 8.4 + CRL(cm) × 1.4 [for 2.5-5 cm range]. Change any input to recalculate the result instantly. This is an informational calculation and is not medical advice.
- The main inputs are CRL. Enter them in the units and format shown in the calculator.
- Use the measurement units shown beside each field. The result is an estimate and should be interpreted in context.
- Changing any input above recalculates the result with the same calculation engine used by this page.
Example: Crown Rump Length (CRL) to Gestational Age Crown Rump Length (CRL)
- CRL: 3 cm
Using CRL (cm) = 3, the calculated result is 12.6.
Sample result: Calculating…
Frequently asked questions
What does the Crown Rump Length (CRL) to Gestational Age Crown Rump Length (CRL) calculate?
Crown Rump Length (CRL) to Gestational Age Crown Rump Length (CRL) Calculator estimates gestational age from fetal crown-rump measurement via ultrasound. CRL is the distance from the top of the fetal head (crown) to the base of the spine (rump), used prim — free online calculator.
Which values should I enter?
Enter CRL using the units and format shown beside each field.
What formula does this calculator use?
The calculator uses the following relationship: GA (weeks) ≈ 8.4 + CRL(cm) × 1.4 [for 2.5-5 cm range].
Why might my result differ from another source?
Results can differ because measurement methods, rounding and assumptions vary. This calculator is an estimate and is not a medical diagnosis.
Does the result update automatically?
Yes. Changing an input updates the result using the same calculation engine shown on this page.