Online LUFS Loudness Meter – Momentary, Short-Term & Integrated
LUFS · liveReady
- Spotify, YouTube: −14 LUFS
- Apple Music: −16 LUFS
- Broadcast EBU R128: −23 LUFS
- Allow the mic in the address bar
- Choose the right input device
- Audio never leaves the tab
- Runs inside your browser
- No upload, no account
- Nothing saved after you close
Live LUFS loudness meter
LUFS is the loudness unit used by streaming services and broadcasters. This meter applies a K-weighting style filter and gating to estimate it live.
What is LUFS?
Loudness Units relative to Full Scale measure perceived loudness using a frequency weighting and time gating (ITU-R BS.1770).
Momentary, short-term, integrated
Momentary uses 400 ms, short-term 3 s, and integrated averages the whole programme while ignoring silence.
Mic vs file measurement
Measuring through a microphone includes room and speaker effects.
How to Use the
Loudness Meter
- 01
Source
start the mic and play audio near it, or route system audio with a loopback device.
- 02
Watch
momentary reacts fast, short-term over 3 s.
- 03
Integrated
let it run over the whole programme.
- 04
Compare
check against your platform target.
What is LUFS?
Loudness Units relative to Full Scale measure perceived loudness using a frequency weighting and time gating (ITU-R BS.1770). One LU equals one dB.
Momentary, short-term, integrated
Momentary uses 400 ms, short-term 3 s, and integrated averages the whole programme while ignoring silence.
Mic vs file measurement
Measuring through a microphone includes room and speaker effects. For accurate mastering numbers use the file loudness meter.
Loudness normalisation
Platforms turn loud tracks down to their target, so mastering louder does not make you louder; it just reduces dynamics.
Meter settings
Scales and standards
EBU R128 uses −23 LUFS, ATSC A/85 −24 LKFS, streaming −14 to −16 LUFS.
Warning thresholds
Watch for peaks above −1 dBFS and short-term readings far above your target.
Privacy
Does the meter send data to a server?
No. Audio is processed locally.
Related guides and fixes
Learn more in these guides: Loudness standards table, Microphone not working, Microphone settings, Discord mic fixes, Decibel levels chart, What is LUFS.
Frequently Asked Questions
Q.Is it accurate?
It approximates BS.1770; use the file meter for precise checks.
Q.Can I measure system audio?
Only via a loopback/virtual device selected as microphone.
Q.dB vs LUFS?
LUFS includes frequency weighting for perceived loudness.