Online Decibel Meter
Measure surrounding sound levels using your device microphone.
Measurement Settings
Optional: compare the tool with a calibrated sound level meter, enter the reference reading, then select Calibrate.
Logged Readings
0 readings| # | Time | dB |
|---|---|---|
| No readings yet | ||
How to Use the Online Decibel Meter
- Select Start Measuring.
- Allow microphone access when prompted.
- Keep the device microphone unobstructed.
- View the current, minimum, average and maximum estimated sound levels.
- Use Measurement Settings to adjust logging, duration or calibration.
- Select Export CSV to download logged readings.
What Is a Decibel Meter?
A decibel meter, also called a sound level meter, measures sound level. This online decibel meter uses your device microphone to estimate surrounding sound levels and displays the result in decibels (dB) directly in your browser.
Common Sound Levels
| Approx. Level | Typical Example |
|---|---|
| 30 dB | Very quiet room |
| 40 dB | Quiet room |
| 50 dB | Quiet office |
| 60 dB | Normal conversation |
| 70 dB | Busy street |
| 80 dB | Heavy traffic |
| 90 dB | Motorcycle or loud equipment |
| 100+ dB | Very loud environment |
Examples are approximate and vary with distance, surroundings and the sound source.
How Accurate Is This Online Sound Level Meter?
This tool provides an estimated sound level rather than a certified acoustic measurement. Phones, laptops and microphones have different sensitivities, while browsers and operating systems may also apply audio processing.
Calibration against a reference meter can improve device-specific consistency. For legal, regulatory, workplace or compliance measurements, use an appropriately calibrated professional sound level meter.
Frequently Asked Questions
How do I measure decibels online?
Select Start Measuring and allow microphone access. The tool analyzes the microphone signal locally in your browser and displays an estimated sound level in decibels.
Does the tool record microphone audio?
No. Audio is processed locally in the browser for sound-level calculation and is not recorded or uploaded.
Why do readings differ between devices?
Different microphones have different sensitivities and built-in audio processing. Calibration against a reference meter can improve consistency.
Can I use these readings for official measurements?
No. This browser-based meter is intended for approximate assessment. Regulatory and compliance measurements should use suitable calibrated equipment.