LUFS (Loudness Units relative to Full Scale)
Definition
A standardized unit of integrated loudness measurement that accounts for human hearing perception across frequencies and time. The primary metric used by streaming platforms for loudness normalization targets.
In Simple Terms
The way streaming platforms measure how loud your track is. Spotify and Apple Music target around -14 LUFS. Master near that number and your song plays back at the volume you intended, without the platform turning it down.
In Practice
Spotify, Apple Music, and Tidal use loudness normalization targeting approximately -14 LUFS, which means a master delivered at or near this level will play back without being turned down.
Sources & Verification
- ITU-R BS.1770-4 — Algorithms to measure audio programme loudness and true-peak audio levelInternational Telecommunication Union, 2015
- EBU R 128 v5.0 — Loudness normalisation and permitted maximum level of audio signalsEuropean Broadcasting Union, 2020
- Loudness normalizationSpotify for Artists
- Sound Check and loudnessApple Music for Artists
Last verified: 2026-04-25