Decibel Meter Online
Measure noise levels in real time with your microphone. This free online decibel meter shows a live dB readout, an animated level bar, and your session minimum, maximum and average. Works in the browser with no signup.
Live Level
-- dB
Press Start to begin measuring
Min
--
Max
--
Average
--
Elapsed
0s
Noise Reference Scale
- Whisper ~30 dB
- Normal conversation ~60 dB
- Busy traffic ~85 dB
- Concert or factory ~120 dB
How to use
- Press the Start button and allow microphone access when your browser asks.
- Watch the live dB reading and the animated level bar move with the sound around you.
- Press Stop to pause, or Reset to clear the min, max and average stats.
Good to know
- Readings are approximate — every device microphone responds differently, so this is a guide, not a calibrated instrument.
- All audio is processed on your device; nothing is recorded or sent anywhere.
- Sounds above about 85 dB can harm hearing with long exposure — use this meter to keep volumes sensible.
- A quiet room usually reads between 30 and 50 dB depending on your device.
- If the microphone is denied, check your browser site permissions and try again.