Karnofsky Score

The Karnofsky Scores purpose was to allow physicians to evaluate a patient’s ability to survive chemotherapy for cancer.

Formula :

Performance score based on clinician assessment in increments of 10.

Explanation of Result :

The Karnofsky score runs from 100 to 0, where 100 is “perfect” health and 0 is death.

* Please verify all calculations prior to clinical use.


  • Yates JW, Chalmer B, McKegney FP. Evaluation of patients with advanced cancer using the Karnofsky performance status. Cancer. 1980 Apr 15;45(8):2220-4. PMID: 7370963.