Sound Decibel Meter

Use this free online sound decibel meter to measure noise levels through your microphone. View live readings and display a sound level in decibels (dB).

Current sound level

— dB*

Ready to measure

Start the meter to sample ambient sound.

Quiet · 0 50 100 120 dB

Average

—

Peak

—

Allow microphone access when prompted.

Measurement History

0 samples

Session duration 00:00

Last reading —

Highest level —

Export & Share

What Is a Sound Decibel Meter?

A sound decibel meter is an online tool that measures the loudness of sounds around you. It uses your device’s microphone to detect sound and display an estimated sound level in decibels (dB). You can use it to check noise levels at home, in the office, at school, or in other everyday environments.

How Use Online Decibel Meter ?

Open the online sound decibel meter.
Allow microphone access when your browser asks for permission.
Start the measurement.
Observe the changing sound level.
Download a PNG report.

Common Sound Levels

20–30 dB: A quiet room or whisper.
40–50 dB: A quiet office or library.
60 dB: Normal conversation.
70–80 dB: Busy traffic or a vacuum cleaner.
85 dB and above: Loud environments that may require hearing protection

Frequently Asked Questions (FAQ)

Is an online sound decibel meter free?

Yes: This Tool is Free

Do I need a microphone to measure sound?

Yes. The tool needs microphone access to capture and analyze surrounding sounds.

What does dB mean in sound measurement?

dB stands for decibel, a unit used to express sound levels.

Can I use a decibel meter without installing an app?

Yes, you can measure estimated sound levels directly in your web browser.

Can I use this tool on a mobile phone?

Yes, most modern smartphones support browser-based sound measurement when microphone access is available.