Loudness Normalization Tool
Enter your track’s measured loudness (LUFS) and a target — with one-tap presets for streaming and broadcast — to get the exact gain to apply, and check whether the result would exceed your true-peak ceiling.
This is a calculator: enter the integrated loudness you measured with a LUFS meter — it computes the gain, it does not measure your audio. Platform target values change over time; verify the current spec. Normalizing is a single gain change, so loudness moves by the same dB (until a limiter caps the peaks).
Target loudness
True-peak check (optional)
After applying the gain above, will your peak exceed the ceiling? Enter your measured true/sample peak and a ceiling (streaming masters commonly use −1 dBTP).
How Loudness Normalization Works
Integrated loudness, measured in LUFS (Loudness Units relative to Full Scale, per ITU-R BS.1770 / EBU R128), estimates how loud a whole track sounds to humans using a K-weighting filter and gating. Streaming services normalize everyone’s uploads to a common target so listeners don’t have to ride the volume between songs — so mastering far louder than the target just gets turned down (and can sound worse, with squashed dynamics).
To normalize, you apply a single gain equal to target − current in dB. If your track is −9 LUFS and the target is −14 LUFS, you apply −5 dB. Because it’s one level change, the integrated loudness shifts by that same amount — unless raising the level would push peaks past your ceiling, in which case a limiter caps the peaks and the achieved loudness gain is reduced.
Why the peak ceiling matters
Lossy codecs (AAC, MP3, Opus) can produce inter-sample peaks slightly above your sample peaks, so masters are usually limited to a true-peak ceiling around −1 dBTP to avoid clipping after encoding. If normalizing up would breach the ceiling, you either accept the lower loudness, apply limiting, or master to the platform target in the first place.