LUFS Calculator

About This Tool

The LUFS Calculator helps you target the right loudness for streaming services. Enter your current integrated LUFS and true peak, pick a platform, and the tool tells you exactly how much that platform will turn your master up or down — and whether your peak will clip after their codec processes the file.

What LUFS Actually Measures

LUFS (Loudness Units Full Scale) is the international standard for perceptual loudness measurement, defined by ITU-R BS.1770 and the EBU R128 broadcast specification. It applies frequency weighting (K-weighting) that mimics human hearing — emphasizing midrange where we're most sensitive, attenuating very low and very high frequencies. It also gates out silent passages so they don't pull down the average. The result correlates much better with perceived loudness than RMS or peak meters.

Why Streaming Loudness Normalization Exists

Before normalization, listeners had to constantly adjust volume between songs. The "loudness wars" of the 1990s and 2000s saw masters pushed to extreme levels — clipping, distorted, exhausting to listen to. Streaming services responded by normalizing playback: every song plays at a similar perceived loudness regardless of how the engineer mixed it. This means mastering louder than the platform target gets your music turned down, with no payoff in perceived loudness.

Spotify and the −14 LUFS Standard

Spotify normalizes to −14 LUFS by default (users can disable this in settings). YouTube, Tidal, Amazon Music, and SoundCloud also target around −14 LUFS. Apple Music targets a quieter −16 LUFS. If your master sits at −8 LUFS (typical for modern EDM and pop), Spotify lowers playback by 6 dB. If you master to −14 LUFS exactly, the playback level passes through unchanged.

How to Approach Mastering for Streaming

One school of thought: master to −14 LUFS exactly to lock playback level. Another school: master for the music — preserve dynamics and emotional impact — and let normalization handle level matching. Both approaches work. What doesn't work is mastering to −7 LUFS expecting to be louder than other tracks. You won't be — you'll just sound more squashed at the same playback level.

True Peak and Codec Headroom

Streaming platforms encode your file to MP3, AAC, or Opus before delivery. These lossy codecs can produce inter-sample peaks 1-2 dB higher than the original file. If your true peak is at −0.3 dBTP, the encoded version might hit +0.7 dBTP and clip. Setting true peak ceiling to −1 dBTP (or −2 dBTP for safety) gives the codec breathing room. Use a true peak limiter (not just a sample peak limiter) for the final stage of mastering.

Pair With Other Tools

Use our Compression Ratio Calculator for dynamics control, the Audio File Size Calculator to plan delivery formats, the Sample Rate Converter for format planning, the Streaming Audio Quality Calculator to compare platform bitrates, the Decibel Distance Calculator for SPL math, or the Music Royalty Calculator for stream payout estimation.