Online · Free · No install

Free Online Decibel Meter

Measure noise levels in real time using your microphone. Check how loud your room, office, classroom, or environment is.

Start Measuring

Your audio is processed locally in your browser. Nothing is recorded or uploaded.

Live Meter

Measure Sound Levels in Real Time

Press start, allow microphone access, and watch the decibel level update live. Min, average, and max are tracked for the whole session.

Reference

What Do These Decibel Levels Mean?

dB Level Example Meaning
30 dB Whisper Very quiet
40 dB Quiet room Comfortable
60 dB Normal conversation Moderate
70 dB Vacuum cleaner Loud
85 dB Heavy traffic Long exposure may be harmful
100 dB Concert / motorcycle Hearing risk
120 dB Siren nearby Painful / dangerous
How It Works

How to Use This Online Decibel Meter

  1. 01 · STEP
    Allow Microphone
    Click Start and allow your browser microphone access when prompted.
  2. 02 · STEP
    Measure Sound
    Stay in the same place for 30–60 seconds for a stable reading.
  3. 03 · STEP
    Check dB Level
    Look at the current, average, minimum, and maximum dB values.

Tip: For a better reading, keep your device still and avoid covering the microphone.

Reference

Noise Level Guide

A quick visual reference for everyday sound levels.

Quiet 0–40 dB
Moderate 40–70 dB
Loud 70–85 dB
Risky 85–100 dB
Dangerous 100+ dB
Use Cases

Common Uses

Home Noise

Check how loud your room or apartment feels.

Office Noise

Measure background noise during work or calls.

Classroom Noise

Monitor noise in learning spaces and activities.

Neighbor Noise

Get a quick noise level estimate from neighbors.

Street Noise

Compare traffic, cars, or outdoor sounds.

Device Testing

Check fans, alarms, speakers, or tools.

Accuracy

Accuracy & Limitations

This online decibel meter is designed for quick everyday noise checks. It uses your device microphone, so results can vary between phones, laptops, browsers, and microphone settings.

Use it to estimate sound levels at home, in the office, or in a classroom. For legal, medical, workplace safety, or compliance measurements, use a calibrated professional sound level meter.

FAQ

Frequently Asked Questions

Is this online decibel meter free?
Yes. You can measure sound levels online for free using your browser. No sign-up, no payment, no ads behind a paywall.
Does this tool record my audio?
No. The sound level is processed locally in your browser. No audio is recorded, stored, or uploaded to any server.
How accurate is this decibel meter?
It provides an estimate. Accuracy depends on your microphone, device, browser, and environment. For certified measurements, use a calibrated professional sound level meter.
What is a safe decibel level?
Quiet and moderate levels are usually comfortable. Long exposure to loud noise, especially around 85 dB and above, may increase hearing risk.
Can I use this on my phone?
Yes. It works in modern mobile browsers as long as you allow microphone access when prompted.