Decibel Meter
Measure noise with this free online decibel meter using your microphone: live dB(A) level, min, max and average, a 60-second chart and a calibration offset.
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Part of the toolkit
How to use Decibel Meter
- 1Press Start measuring and allow microphone access
- 2Watch the live level, minimum, maximum and average (Leq) and the 60-second chart
- 3Choose A or Z weighting and fast or slow response, and calibrate against a known level for better accuracy
Frequently asked questions
How accurate is an online decibel meter?▾
It uses the same A-weighting and time constants as real sound level meters, but every microphone has a different sensitivity, so uncalibrated readings are estimates. Use the calibration offset to match a known reference.
What is dB(A)?▾
Decibels with A-weighting, which reduces very low and very high frequencies the way human hearing does. It's the standard unit for noise limits and hearing safety.
How loud is too loud?▾
Long exposure above about 85 dB(A) can damage hearing — NIOSH recommends no more than 8 hours at 85 dB(A) and halving the time for every 3 dB more. Normal conversation is around 60 dB.
Is the audio recorded?▾
No. Only the level is calculated, live in your browser; nothing is recorded, stored or uploaded.
Embed Decibel Meter on your website▾
Paste this snippet into your page. The embedded tool runs in your visitor's browser and shows a small “Powered by clkr.work” link.