LUFS Loudness Normalization Calculator — Streaming Platform Targets
Master and playback reference
Use the integrated reading for the full song or programme.
Use a true-peak meter, not only a sample-peak meter.
Normalization estimate
Peak-safe gain to apply
Target −14.0 LUFS · ceiling −1.0 dBTP
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Compare loudness references
“Peak-safe” caps positive gain at each row’s ceiling. Real services may use album normalization, proprietary measurements, limiters, device-specific behavior, or listener settings.
| Platform / mode | Target | Desired gain | Peak-safe result | Source status |
|---|---|---|---|---|
| Spotify Normal | −14.0 LUFS | −5.0 dB | −14.0 LUFS / −5.8 dBTP | Published |
How to use this LUFS normalization calculator
- Measure the finished programme. Enter integrated LUFS and the maximum true peak from a BS.1770-compatible loudness meter.
- Choose a playback reference. Published targets are identified separately from planning values that platforms do not publish as fixed specifications.
- Read both gain figures. Desired gain reaches the loudness target; peak-safe gain stops first if positive gain would exceed the chosen dBTP ceiling.
- Compare, then listen. Export the table for session notes, but audition the encoded master and preserve intentional dynamics.
LUFS normalization formula and true-peak limit
Desired gain: G = target LUFS − measured LUFS
Peak after gain: P = measured dBTP + G
Peak-safe gain: Gsafe = min(G, ceiling dBTP − measured dBTP)
Peak-safe loudness: Lsafe = measured LUFS + Gsafe
A negative gain turns playback down. A positive gain raises it only while the selected true-peak headroom permits. For example, a −20 LUFS master with a −5 dBTP peak needs +6 dB to reach −14 LUFS, but a −1 dBTP ceiling permits only +4 dB. The simple peak-safe result is therefore −16 LUFS at −1 dBTP.
This is a gain estimate, not an audio processor. It cannot predict codec overs, platform-specific gating, dialogue normalization, dynamic limiting, or how a service groups an album.
Streaming target notes and source quality
Spotify is a published target. Spotify states that Normal playback adjusts tracks to −14 LUFS under ITU-R BS.1770, with Loud at −11 LUFS and Quiet at −19 LUFS. It also documents headroom-aware positive gain for Normal and a limiter for Loud. See Spotify’s loudness normalization documentation.
Apple Music is a reference preset. Apple documents that Sound Check measures tracks and stores loudness metadata to raise or lower playback, while also recommending at least 1 dB of headroom for encoding. Its public technology brief does not state a fixed LUFS target. See the Apple Digital Masters technology brief.
YouTube, Amazon Music, TIDAL, and Deezer are reference presets here. The numbers shown are common studio planning values, not contractual delivery specifications. Platform behavior can change and may vary by content, product, device, region, and user settings. YouTube publicly notes that it can make automatic volume adjustments and offers Stable volume, but its public help used for this page does not publish a fixed LUFS target. See YouTube’s audio enhancement help.
EBU R128 is included as a broadcast check. It is not a music-streaming preset. EBU R128 specifies −23 LUFS for programme loudness and −1 dBTP for generic linear audio. See EBU R128.
What the result means for mastering
- Turning down is transparent gain. A −5 dB estimate means the player may reproduce the track 5 dB quieter; it does not restore dynamics already removed during mastering.
- Turning up needs headroom. If positive gain crosses the ceiling, a service may stop short, limit, or use different behavior. The calculator shows the conservative stop-short case.
- −14 LUFS is not a universal requirement. Loudness is a creative choice. Check dynamics, genre expectations, encoding quality, and the loudness relationship across an album.
- Measure the complete render. Short-term or momentary LUFS is not interchangeable with the integrated value used here.
- Audition encoded files. Lossy encoding can create inter-sample peaks, so true-peak headroom remains useful even when playback normalization turns a loud master down.
LUFS loudness normalization FAQ
What is the LUFS normalization formula?
Desired gain equals target integrated LUFS minus measured integrated LUFS. A −9 LUFS master compared with −14 LUFS receives −5 dB.
Does a streaming service change my uploaded audio file?
Usually normalization is playback gain rather than a change to the delivered master. Exact processing varies by platform, playback mode, device, and listener setting.
Is −14 LUFS a mastering requirement?
No. It is Spotify’s published Normal playback target and a common reference elsewhere, not a universal mastering rule.
Why can a quiet master fail to reach the target?
Raising a quiet but dynamic master may push its true peak above the ceiling. The peak-safe estimate stops at that ceiling, leaving the result below target.
What is the difference between LUFS and dBTP?
Integrated LUFS estimates perceived loudness over the whole programme. dBTP estimates the highest reconstructed waveform peak. Check both.
Are the Apple Music and YouTube values official targets?
No. Their presets are clearly marked engineering references. The public Apple and YouTube documentation linked above describes normalization or volume adjustment without giving the fixed LUFS values used in these presets.
Should I normalize an album track by track?
Not always. Album normalization can preserve intentional differences between tracks. Check the individual songs and the album sequence.