What Is LUFS? Loudness for Streaming Explained
Updated June 2026 · by Loopin
LUFS stands for Loudness Units relative to Full Scale — the standard way to measure how loud a track actually sounds to human ears (defined by ITU-R BS.1770 / EBU R128). Unlike a peak meter, LUFS reflects perceived loudness over time, which is why every streaming platform uses it.
Why −14 LUFS?
Streaming services normalise playback so songs don't jump in volume. Most target around −14 LUFS integrated. If you master much louder than that, the platform simply turns your track down — so you lose dynamics and punch for no gain in loudness. Mastering to roughly −14 LUFS keeps your track competitive and dynamic.
What is true peak (dBTP)?
True peak, measured in dBTP, is the real maximum level between samples. Lossy codecs (MP3, AAC) and digital-to-analog converters can push these inter-sample peaks above 0 dB and clip, even when your normal peak meter looks fine. The fix is to leave headroom: master to a −1 dBTP ceiling. This is the single most common thing beginners miss.
Loudness range and dynamics
Loudness isn't everything — you also want to keep some dynamic range so the track breathes. Crushing a master flat makes it tiring within seconds. Aim for the loudness target while keeping the punch.
How to hit the target without the maths
Loopin Mastering measures your track's integrated LUFS, auto-gains it to the preset's target (about −14 LUFS for streaming, hotter for club), and applies a true-peak limiter at −1 dBTP — so you land in the right place automatically, free and in your browser.
Try it now: open the free Loopin Mastering tool — drop in an MP3 or WAV, pick a feel, and download a streaming-ready master. Nothing leaves your device.