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Gorlin Formula

mL/min

Result

Calculated result 22.5733634312 Based on the values entered.
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Gorlin Formula — free online calculator.

Formula

AVA = CO (mL/min) / (44.3 × √Mean Gradient); Normal > 1.0 cm², Severe < 0.75 cm²
  • Gorlin Formula calculates its result from Cardiac output (mL/min), Mean gradient. It uses the formula AVA = CO (mL/min) / (44.3 × √Mean Gradient); Normal > 1.0 cm², Severe < 0.75 cm². Change any input to recalculate the result instantly. This is an informational calculation and is not medical advice.
  • The main inputs are Cardiac output, Mean gradient. 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: Gorlin Formula

Inputs
  • Cardiac output: 5000 mL/min
  • Mean gradient: 25

Using Cardiac output (mL/min) = 5000, Mean gradient = 25, the calculated result is 22.5733634312.

Sample result: Calculating…

Frequently asked questions

What does the Gorlin Formula calculate?

Gorlin Formula — free online calculator.

Which values should I enter?

Enter Cardiac output, Mean gradient using the units and format shown beside each field.

What formula does this calculator use?

The calculator uses the following relationship: AVA = CO (mL/min) / (44.3 × √Mean Gradient); Normal > 1.0 cm², Severe < 0.75 cm².

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.

Page information

Updated: October 7, 2026