ENT Calculators

Predicts likelihood of Group A Streptococcal (GAS) pharyngitis to guide antibiotic prescribing. McIsaac modification adds age adjustment.

Radiological staging system for chronic rhinosinusitis using CT sinus scoring. Each sinus scored 0-2. Maximum score 24.

Clinical scoring system for acute epistaxis to guide treatment escalation from simple first aid to intervention.

Evidence-based criteria for tonsillectomy in recurrent tonsillitis. Requires ≥7 episodes in 1 year, ≥5/year for 2 years, or ≥3/year for 3 years.

Clinical assessment and diagnostic criteria for Benign Paroxysmal Positional Vertigo (BPPV) based on Dix-Hallpike findings.

Interprets Snellen chart visual acuity measurements. Standard notation: 6/x metres (UK) or 20/x feet (US). Used to screen for visual impairment, assess driving eligibility, and guide referral to ophthalmology.

Pseudoisochromatic plate test for identifying congenital red-green colour vision deficiency. Standard 24-plate test: 17+ correct = normal; 13 or fewer = colour vision deficiency. Important for certain occupations (aviation, driving, certain clinical roles).

Classifies acute rhinosinusitis severity and guides antibiotic prescribing based on EPOS 2020 guidelines.

Patient-reported outcome measure for chronic rhinosinusitis. Score 0-110; higher scores indicate greater disease burden. Guides treatment decisions and surgical referral.

Grades severity of hearing loss based on average hearing threshold (dB HL) per WHO classification. Guides audiological and surgical referral.

Predicts likelihood of Group A streptococcal pharyngitis/tonsillitis to guide antibiotic prescribing. Developed in UK primary care.

Screens for obstructive sleep apnoea (OSA) using 8 dichotomous questions. High risk guides polysomnography referral and perioperative planning.

Quantifies epistaxis severity to guide management from first aid to surgical intervention. Considers frequency, volume, and haemodynamic impact.

Differentiates central (stroke) from peripheral vertigo using Head Impulse, Nystagmus, Test of Skew (HINTS) plus hearing loss. Outperforms early MRI for posterior fossa stroke.

Grades acute otitis media severity to guide antibiotic prescribing vs watchful waiting in children and adults.

Standard grading of facial nerve function (House & Brackmann 1985), used for Bell's palsy, post-parotidectomy, post-acoustic neuroma surgery and other facial palsy. Grades I (normal) to VI (total paralysis).

25-item self-report tinnitus burden questionnaire (Newman 1996). Each item: No (0), Sometimes (2), Yes (4). Total 0–100. Pick severity band — for full item-level score use the THI form.

25-item self-report (Jacobson 1990). Functional, emotional and physical sub-scales. Each item: No (0), Sometimes (2), Yes (4). Total 0–100. Pick severity band — for full score use DHI form.

25-item self-report screening for adults <65 (Newman 1990; HHIE for ≥65). Emotional + Social/Situational sub-scales. Each item: No (0), Sometimes (2), Yes (4). Total 0–100.

10-item self-report of voice-related disability (Rosen 2004). Each 0 (never) to 4 (always). Total 0–40. Score >11 abnormal; ≥17 indicates significant voice handicap.

Predicts surgical (UPPP) success and OSA severity from oropharyngeal anatomy (Friedman 1999). Combines Friedman Tongue Position (FTP I–IV), tonsil size (0–4) and BMI to derive Stage I–IV.

10-item screening version for adults ≥65 (Ventry & Weinstein 1983). Each item: No (0), Sometimes (2), Yes (4). Total 0–40. Cut-off ≥10 indicates self-perceived hearing handicap and triggers audiometry.

9-item self-report screen for laryngopharyngeal reflux (Belafsky 2002). Each symptom 0 (no problem) to 5 (severe). Total 0–45. Score >13 considered abnormal and triggers PPI trial / further workup.

8-item laryngoscopic examination score (Belafsky 2001) for LPR. Total 0–26. Score >7 abnormal. Useful pre/post PPI to monitor response.