SCORAD Calculator - SCORing Atopic Dermatitis

The total SCORAD score ranges from 0 to 103 and is derived using three distinct components: A (Extent), B (Intensity), and C (Subjective symptoms). The formula is expressed as:

SCORAD = A/5 + 7b/2 + C

Component A measures the percentage of body surface area affected, scored using the rule of nines up to a maximum of 100%. Component B evaluates six key clinical signs of intensity on a 0 to 3 scale (none, mild, moderate, severe): redness, swelling, oozing/crusting, scratch marks, skin thickening (lichenification), and dryness. Component C quantifies subjective symptoms—daily itching (pruritus) and sleep loss—each scored by the patient from 0 to 10 on a visual analogue scale.

Consider an adult patient presenting with moderate-to-severe eczema symptoms. First, we evaluate the affected body surface area (A). The head accounts for 5%, upper limbs 10%, anterior trunk 20%, back 15%, lower limbs 15%, and genitals 5%, giving a total extent sum of A = 70.

Next, the clinician assesses the six intensity signs (B) on a 0-3 scale: redness scored 2, swelling scored 1, oozing scored 0, scratch marks scored 2, skin thickening scored 2, and dryness scored 3. The sum is b = 10.

Finally, the patient rates their subjective symptoms (C): daily itching scores 7 out of 10, and sleep loss scores 5 out of 10, giving a total subjective sum of c = 12.

Applying the formula: SCORAD = (70 / 5) + (7 * 10 / 2) + 12 = 14 + 35 + 12 = 61. This yields a severe SCORAD rating of 61.

Evaluate skin surface area consistently under good lighting, preferably using standardized body charts. Ensure subjective scores for itching and insomnia reflect an average of the past three days rather than a single acute flare-up. Tracking your SCORAD score weekly can help your dermatologist determine whether a new topical regimen or lifestyle change is successfully managing your symptoms.