Noise Exposure Limit Calculator
Health & FitnessCalculate the maximum safe daily exposure time at a given noise level, using the standard OSHA permissible exposure formula.
Maximum Safe Daily Exposure
The maximum recommended daily exposure time at this noise level, using the OSHA 5-decibel exchange rate formula.
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Frequently Asked Questions
What is the OSHA permissible exposure formula?
OSHA uses a 5-decibel exchange rate, meaning the permissible exposure time is cut in half for every 5-decibel increase in noise level above the 90 decibel, 8-hour baseline.
What noise level is considered safe for 8 hours?
90 decibels is the OSHA baseline for a full 8-hour permissible exposure. Common examples near this level include a lawnmower or heavy city traffic.
What are some real-world noise level examples?
Normal conversation is around 60 dB, a vacuum cleaner around 75 dB, a motorcycle around 95 dB, and a rock concert or chainsaw can reach 110-120 dB.
Does this account for hearing protection?
No, this calculates exposure time for unprotected ears. Hearing protection such as earplugs or earmuffs can meaningfully extend safe exposure time by reducing the effective noise level reaching your ears.
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