House–Brackmann score House–Brackmann score House–Brackmann score

| Grade | Description | Measurement | Function_ | Estimated_function_ |
|---|---|---|---|---|
| I | Normal | 8/8 | 100 | 100 |
| II | Slight | 7/8 | 76–99 | 80 |
| III | Moderate | 5/8–6/8 | 51–75 | 60 |
| IV | Moderately severe | 3/8–4/8 | 26–50 | 40 |
| V | Severe | 1/8–2/8 | 1–25 | 20 |
| VI | Total | 0/8 | 0 | 0 |