Dermatology

Psoriasis Area and Severity Index (PASI) calculator

Enter the published formula inputs below to calculate and interpret this score.

Clinical inputs

Head: erythema

Head: induration

Head: scaling

Head: involved area

Upper limbs: erythema

Upper limbs: induration

Upper limbs: scaling

Upper limbs: involved area

Trunk: erythema

Trunk: induration

Trunk: scaling

Trunk: involved area

Lower limbs: erythema

Lower limbs: induration

Lower limbs: scaling

Lower limbs: involved area

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Fredriksson T, Pettersson U. Severe psoriasis—oral therapy with a new retinoid. Dermatologica (1978)