Oxford Knee Score Calculator NHS
This independent scoring aid calculates the total from an authorised Oxford Knee Score (OKS) questionnaire. The OKS is a 12-item patient-reported measure of knee pain and function developed at the University of Oxford, particularly for knee-replacement outcomes.
Oxford Knee Score total calculator
Enter the 12 item scores from your authorised questionnaire. Under the recommended current system each item is scored 0 to 4, where 4 is the best outcome or least symptoms and 0 is the greatest symptom severity.
Important: this page does not reproduce the copyrighted OKS questionnaire. Complete an authorised version first, then enter its item scores here.
How scoring works
Oxford University Innovation recommends scoring all 12 items from 0 to 4 and summing them. The total ranges from 0 to 48. A higher score represents fewer symptoms and better reported function.
Missing answers
The official scoring guide says that if more than two questions remain unanswered, an overall score should not be calculated. This simple calculator does not impute missing values.
Worked example
Item scores 4, 3, 3, 2, 3, 2, 2, 3, 2, 2, 3 and 2 sum to 31/48. The result should be interpreted in clinical context and can be useful when comparing change over time.
Limitations
The OKS is a patient-reported outcome measure. It does not by itself diagnose osteoarthritis, decide whether knee replacement is required or replace clinical assessment.
Authoritative Sources
- Oxford University Innovation: Oxford Knee Score
- Official OKS scoring guide
- NHS England Digital: PROMs scoring methodology
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FAQs
What is the Oxford Knee Score range?
The recommended current system runs from 0 to 48, with higher scores representing a better reported knee state.
How many questions are in the Oxford Knee Score?
There are 12 patient-reported items.
Can the Oxford Knee Score diagnose arthritis?
No. It is an outcome measure, not a standalone diagnostic test.
Why are the questionnaire questions not reproduced?
The Oxford Knee Score is copyrighted and licensing is managed by Oxford University Innovation, so this page only provides the arithmetic scoring layer.
Disclaimer: This independent scoring aid is not affiliated with Oxford University or the NHS and does not replace an authorised questionnaire or clinical assessment.