The Westley Croup Score is the sum of points for five clinical signs:

Clinical sign	Finding	Points
Level of consciousness	Normal (including sleep)	0
Level of consciousness	Disoriented/altered	5
Cyanosis	None	0
Cyanosis	With agitation	4
Cyanosis	At rest	5
Stridor	None	0
Stridor	With agitation only	1
Stridor	At rest	2
Air entry	Normal	0
Air entry	Decreased	1
Air entry	Markedly/severely decreased	2
Chest wall retractions	None	0
Chest wall retractions	Mild	1
Chest wall retractions	Moderate	2
Chest wall retractions	Severe	3

Total score range 0–17.

Commonly used severity bands:

Total score	Croup severity
0–2	Mild
3–7	Moderate
8–11	Severe
12–17	Impending respiratory failure