T-VASI / F-VASI (Vitiligo Area Scoring Index) Calculator
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Face
Total Surface Area (as % BSA):
0
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Depigmentation:
Fully (100%) depigmented
90% depigmented
75% depigmented
50% depigmented
25% depigmented
10% depigmented
Calculate F-VASI
Head/neck
Total Surface Area (as % BSA):
0
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Depigmentation:
Fully (100%) depigmented
90% depigmented
75% depigmented
50% depigmented
25% depigmented
10% depigmented
Trunk (inc genitalia)
Total Surface Area (as % BSA):
0
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Depigmentation:
Fully (100%) depigmented
90% depigmented
75% depigmented
50% depigmented
25% depigmented
10% depigmented
Upper extremities (including axilla)
Total Surface Area (as % BSA):
0
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Depigmentation:
Fully (100%) depigmented
90% depigmented
75% depigmented
50% depigmented
25% depigmented
10% depigmented
Hands (Dorsal only)
Total Surface Area (as % BSA):
0
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Add Fingertip Unit
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Depigmentation:
Fully (100%) depigmented
90% depigmented
75% depigmented
50% depigmented
25% depigmented
10% depigmented
Lower extremities (including buttocks)
Total Surface Area (as % BSA):
0
Add Hand Unit
Subtract Hand Unit
Add Fingertip Unit
Subtract Fingertip Unit
Depigmentation:
Fully (100%) depigmented
90% depigmented
75% depigmented
50% depigmented
25% depigmented
10% depigmented
Feet (Dorsal only)
Total Surface Area (as % BSA):
0
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Add Fingertip Unit
Subtract Fingertip Unit
Depigmentation:
Fully (100%) depigmented
90% depigmented
75% depigmented
50% depigmented
25% depigmented
10% depigmented
Calculate T-VASI
Based on the following papers:
Parametric modeling of narrowband UV-B phototherapy for vitiligo using a novel quantitative tool: the Vitiligo Area Scoring Index
Psychometric Evaluation of the Facial and Total Vitiligo Area Scoring Index Instruments in the TRuE-V Phase 3 Studies
About the Author: Dr. Trevor Champagne MD FRCPC (Dermatology)
To contact the author or report issues, please email info @ vasi.app
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You may notice it is possible to calculate the T-VASI at more than 100%. This is intentional to allow flexibility, respecting that the "total BSA" of individual areas such as the feet is only an estimate.