What is a SCORAD Calculator and How Does It Work?
A SCORAD calculator is an essential clinical tool for assessing the severity of atopic dermatitis (eczema). Our SCORAD calculator 2026 uses the validated SCORing Atopic Dermatitis index to provide accurate severity scores. The atopic dermatitis scoring tool combines three components: Body Surface Area (BSA), objective signs (erythema, edema, excoriation, lichenification, oozing/crusting, dryness), and subjective symptoms (itch and sleep loss). Whether you're a dermatologist, allergist, or patient, this eczema severity score calculator helps guide treatment decisions.
How does the SCORAD score calculator work? Enter the BSA percentage (0-100%), select objective sign scores (0-3 each), and enter subjective symptom scores (0-10 each). The scorad atopic dermatitis calculator instantly shows your total SCORAD score, severity classification, and treatment recommendations. The eczema BSA calculator and scoring atopic dermatitis tool use the validated SCORAD formula.
SCORAD Formula Explained
SCORAD = (A/5) + (B × 0.2) + (C × 0.3)
A = Extent (BSA %): Body Surface Area affected by eczema. Measured using the Rule of Nines. Head & neck 9%, Upper limbs 9% each, Trunk 18% (front and back), Lower limbs 18% each, Genital area 1%.
B = Objective Signs (0-18): Erythema (redness), Edema/Papules, Excoriation, Lichenification, Oozing/Crusting, Dryness. Each scored 0 (none), 1 (mild), 2 (moderate), 3 (severe).
C = Subjective Symptoms (0-20): Itch (pruritus) on a 0-10 Visual Analog Scale (VAS) and Sleep Loss on 0-10 VAS.
SCORAD Severity Classification
Mild (0-15): Emollients, mild topical steroids, trigger avoidance. Most patients respond to basic skincare.
Mild-Moderate (15-25): Moderate topical steroids, antihistamines, trigger management. Wet wraps may be considered.
Moderate (25-40): Moderate-strong topical steroids, wet wraps, systemic antihistamines. Consider phototherapy.
Moderate-Severe (40-50): Potent topical steroids, phototherapy, systemic treatment (cyclosporine, methotrexate).
Severe (50+): Systemic immunosuppressants, biologics (dupilumab), phototherapy. Specialist referral needed.
Body Surface Area (BSA) Calculation
BSA is estimated using the Rule of Nines: Head & neck 9%, Upper limbs 9% each (total 18%), Trunk 18% (front 9% + back 9%), Lower limbs 18% each (total 36%), Genital area 1%. For infants under 2 years, the head is 18% and legs are 15% each. Our scorad calculator includes both adult/child and infant age groups for accurate BSA estimation.
Objective Signs Assessment Guide
Erythema: 0 (none) to 3 (intense redness). Edema/Papules: 0 (none) to 3 (marked elevation). Excoriation: 0 (none) to 3 (numerous excoriations). Lichenification: 0 (none) to 3 (thick leathery skin). Oozing/Crusting: 0 (none) to 3 (profuse oozing). Dryness: 0 (none) to 3 (severe scaling). Total objective score (B) = sum of all 6 signs (maximum 18).
Subjective Symptoms Assessment
Itch (Pruritus): Patient-reported severity on a 0-10 scale. 0 = no itch, 5 = moderate itch interfering with daily activities, 10 = worst possible itch. Sleep Loss: Patient-reported sleep disturbance on a 0-10 scale. 0 = no sleep disturbance, 5 = moderate sleep disruption, 10 = severe sleep loss preventing sleep. Total subjective score (C) = Itch + Sleep Loss (maximum 20).
SCORAD in Clinical Practice
SCORAD is the most widely used severity scoring tool for atopic dermatitis in clinical trials and daily practice. It has been validated in multiple languages and populations. A SCORAD score above 40 indicates severe atopic dermatitis requiring specialist care. For children with moderate eczema (15-40), SCORAD helps guide step-up therapy decisions. The atopic dermatitis scoring tool is also used to monitor treatment response over time.