Pure Tone Average (PTA)
Pure-tone average: mean of the air-conduction thresholds at 500/1000/2000 Hz (3FA), plus 4000 Hz for the 4FA, mapped to a hearing-loss severity band.
Open the calculator → Runs in your browser. Data leaves only if you deliberately send a problem report from the interactive tool.
Example
- Air-conduction threshold at 500 Hz
- 40 dB HL
- Air-conduction threshold at 1000 Hz
- 45 dB HL
- Air-conduction threshold at 2000 Hz
- 50 dB HL
- Air-conduction threshold at 4000 Hz
- 65 dB HL
Result: 3-frequency PTA 45, 4-frequency PTA 50 dB HL — moderate hearing.
The tool opens with these values already filled in. Replace them with your own.
What the result means
- Average
- 3FA = mean(500, 1000, 2000 Hz); 4FA adds 4000 Hz.
- Severity (dB HL)
- normal ≤25, mild 26–40, moderate 41–55, moderately severe 56–70, severe 71–90, profound >90.
What you enter
- Air-conduction threshold at 500 Hz
- Air-conduction threshold at 1000 Hz
- Air-conduction threshold at 2000 Hz
- Air-conduction threshold at 4000 Hz (optional, for the 4-frequency average)
How this is calculated
Four-frequency pure-tone average: the mean of the air-conduction thresholds at 500, 1000, 2000, and 4000 Hz; standard audiometric average (e.g. AAO-HNS / ASHA hearing-loss grading). Read the source ↗
A reference and educational tool. Not medical, legal, or financial advice, and not a substitute for clinician judgment.