GRBAS Voice Disorder Scale
Rate voice quality clinically using the GRBAS scale assessing Grade, Roughness, Breathiness, Asthenia, and Strain.
Input Parameters
Enter details for calculation.
GRBAS Index
Expert Tip
Each parameter is rated from 0 to 3. Grade represents the overall voice deviation severity.
Calculation Methodology & Details
Formula
Perceptual rating system standardizing dysphonia severity.
Important Disclaimer
The calculations provided are for educational and general informational purposes only. They do not replace professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider.
How GRBAS is Scored
Follow these steps to use this calculator:
Listen to Voice Sample
Check vocal stability and breath leakage.
Rate Parameters
Grade individual parameters from 0 (normal) to 3 (severe).
Related Calculators
View All Health Tools →Detailed Insights & Expert Guide
ℹ️ About this Calculation
This ophthalmology and otolaryngology (ENT) clinical calculator evaluates visual acuity metrics, intraocular lens power, audiometric hearing threshold shifts, voice dysfunction scores, and occupational noise exposure limits based on AAO and OSHA standards.
Variable Glossary
Sensory & Biometric Measurements
Snellen fraction (20/20), LogMAR, corneal keratometry (K), axial length (mm), audiogram decibels (dB), or dBA noise levels.
Clinical Assessment Scales
Target IOL diopters (SRK/T formula), pure-tone average (PTA), GRBAS dysphonia grade, and daily noise dose percentage.
How to Calculate Step-by-Step
Step 1
Select visual acuity notation system (Imperial Snellen, Metric, LogMAR, Decimal) or audiometric frequency thresholds.
Step 2
Input ocular biometry parameters, sound decibel levels, or voice acoustic ratings.
Step 3
Review converted vision scales, recommended lens implant diopters, or hearing impairment classification.