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LAS Calculator

This calculator uses the same formula as the UNet system which is used by transplant centers to calculate lung allocation scores for patients in need of a lung transplant.

How the calculator should be used

The LAS calculator is a tool that can be used to estimate each lung candidates' medical urgency and expected post-transplant survival rate relative to other patients on the waiting list for a lung transplant.

What the calculator isn't...

The LAS calculator cannot accurately predict how long any patient will live with or without a transplant. It is not a definitive measure of life expectancy on the waiting list or post-transplant survival. It does not include all factors that influence survival and does not take into account any quality-of-life benefit patients may receive from transplantation.

Talk to your physician or your transplant team about your specific situation.

How to calculate an approximate lung allocation score (LAS)

Enter as much data as you can. If you do not know the value for an entry, leave the field blank and a policy default value will be used when calculating the LAS.

Point of Information LAS results should not be considered definitive; they are merely a snapshot based upon the values entered and can vary daily.

Height *

Weight *

Amount *

Info Marker If using a central venous test value for PCO₂ subtract 6 mmHg before entering the value.
PCO₂ (mmHg)
Serum Creatinine (mg/dL)
Total Bilirubin (mg/dL)