OSHA Noise Dose and 8-Hour TWA From a Day of Exposures (29 CFR 1910.95 App. A)
OSHA noise dose and 8-hour TWA from a day of exposures, per 29 CFR 1910.95 Appendix A.
Open the calculator → Runs in your browser. Data leaves only if you deliberately send a problem report from the interactive tool.
Example
- Exposures, one per line
- 95, 4 90, 4
Result: Dose 150%, 8-hour TWA 92.9 dBA.
The tool opens with these values already filled in. Replace them with your own.
What you enter
- Exposures, one per line: dBA, then hours or hours:minutes
- Dosimeter dose in percent (when no exposures are entered)
- Impulsive or impact noise above 140 dB peak
How this is calculated
Citation
Occupational Safety and Health Administration. Occupational noise exposure, 29 CFR 1910.95: paragraph (c) (the 85 dBA or 50% action level), paragraph (d)(2)(i) (levels from 80 to 130 dB integrated), Table G-16, and Appendix A (noise dose, Table G-16a, and TWA = 16.61 log10(D/100) + 90). Read the source ↗
A reference and educational tool. Not medical, legal, or financial advice, and not a substitute for clinician judgment.