Is the traffic outside your window, the generator next door or the music at a party too loud? Use your microphone to estimate the sound level in decibels (dB) and compare it with everyday sounds, from a whisper at 30 dB to a siren at 120 dB. See the lowest, highest and average level over time, and a live graph.
loading toolHow to measure sound level
- Press Start measuring and allow the microphone.
- Hold the device still, pointing the microphone at the sound.
- Watch the live number, and the lowest, highest and average readings.
- Press Stop when done; Reset starts a fresh measurement.
Good to know
- The average shown is an energy average (like Leq on professional meters), so short loud bursts count properly.
- For noise complaints, record times and readings over several days; a phone reading is useful evidence of a pattern but not an official measurement.
Questions
How accurate is it?
It is an estimate. Phone and laptop microphones are not calibrated and many reduce loud sounds automatically, so readings are often within 5–10 dB of a real sound level meter, and less reliable above about 100 dB. If you have a proper meter, use Calibrate to match it.
Is my sound recorded?
No. The tool only measures loudness while it runs. Nothing is recorded, saved or uploaded, and the microphone turns off when you press Stop or leave the page.
What level is harmful?
Health bodies advise limiting time above 85 dB (heavy traffic): around 8 hours at 85 dB, and much less as it gets louder. Every 3 dB more is twice the sound energy.
Is my data private?
Yes. Everything happens inside your own browser: nothing you type or choose is uploaded to us or anyone else.
Is it free?
Completely free, with no sign-up, no watermark and no limit on how many times you use it. Light ads keep the site running.
