What is LUFS and why does it matter for your music? This simple beginner-friendly guide explains LUFS, dB, True Peak, loudness normalisation, LRA and why louder does not always mean better.

What Is LUFS? A Simple Guide to Loudness for Beginners

If you have ever uploaded a song to Spotify, YouTube, Apple Music or another streaming service and wondered:

“Why does my song sound quieter than someone else’s?”

Or maybe you have seen numbers like -14 LUFS, -10 LUFS or -8 LUFS and thought:

“What on earth does that mean?”

Don’t worry.

LUFS sounds complicated, but the basic idea is actually quite simple.

Think of LUFS as a way of measuring how loud your music sounds to your ears over time.

What Does LUFS Mean?

LUFS stands for Loudness Units relative to Full Scale.

That is a technical way of saying that LUFS is a measurement used to describe the perceived loudness of audio.

The important word here is loudness.

LUFS is not exactly the same thing as measuring the biggest peak in your song. It is designed to give us a better idea of how loud the audio actually sounds over time.

Imagine Two Songs

Let's say you have two songs.

Song A: -14 LUFS

Song B: -8 LUFS

At first, you might think:

“-8 must be better because it is louder!”

Not necessarily.

Song B is being measured as louder, but that does not automatically mean it sounds better.

It could have less dynamic range, more compression, more limiting, less punch or even distortion if it has been pushed too far.

This is one reason the old idea of making everything as loud as possible can become a problem.

LUFS Is Not the Same as Peak

This is one of the most important things to understand.

Imagine you throw a ball into the air.

The highest point the ball reaches is like the peak.

LUFS is more interested in the overall experience of how loud the audio feels over time.

In simple terms:

Peak = How high does the signal get?

LUFS = How loud does the audio generally feel?

You can therefore have two songs with similar peaks but very different LUFS readings.

Song	Peak	Loudness
Song A	-1 dBTP	-14 LUFS
Song B	-1 dBTP	-8 LUFS

Both songs can have a similar maximum peak, but Song B is much more heavily pushed toward being loud.

Why Are the Numbers Negative?

This is another thing that confuses beginners.

You might see:

-20 LUFS

-14 LUFS

-10 LUFS

-8 LUFS

Why are they negative?

Digital audio has a maximum reference level called 0 dBFS. Think of 0 as the ceiling.

So the LUFS numbers you commonly see are below zero.

And here is the important part:

-8 LUFS is louder than -14 LUFS.

The closer the number gets to zero, the louder the measured level is.

A Grade 6 Example

Imagine your teacher gives you a test.

You get 90%.

Your friend gets 70%.

You scored higher.

LUFS is a little weird because the numbers are negative.

Imagine instead that the scores were:

-10

and

-14

The number -10 is higher than -14.

So in LUFS:

-10 LUFS is louder than -14 LUFS.

That is one of the most important things to remember.

Why Not Just Make Every Song -5 LUFS?

If louder is louder, why not make every song extremely loud?

Because making music louder is not free.

You usually have to change the audio to get there.

One common way is to use compression and limiting.

These tools can reduce the difference between the quieter and louder parts of a song.

Imagine your drummer playing:

quiet → medium → VERY LOUD → quiet

A limiter can reduce that very loud part. Then you can turn the whole track up.

Do this repeatedly and you can make the overall track much louder.

But push it too far and you can start losing the things that make the music feel alive.

You may hear:

Distortion
Pumping
Squashed drums
Reduced punch
Harshness
Listener fatigue

So the goal is not simply:

“Get the biggest LUFS number possible.”

The goal is:

“Make the music sound good at the loudness you need.”

What Does -14 LUFS Mean?

You have probably heard -14 LUFS mentioned when people talk about streaming.

This number gets repeated a lot online.

But there is an important point to understand:

There is not one magic LUFS number that every piece of music must hit.

Different platforms and playback systems can use different loudness-normalisation approaches and settings.

Even when a platform has a target, that does not mean your master must magically be exactly that number.

The bigger lesson is:

Do not master your song badly just to hit a number.

Your music should sound good first.

What Is Loudness Normalisation?

Imagine you create a playlist.

Song 1 is extremely loud.

Song 2 is much quieter.

Song 3 is somewhere in the middle.

Without loudness normalisation, you might constantly reach for the volume control.

Up.

Down.

Up.

Down.

Annoying.

Loudness normalisation attempts to make different pieces of content play back at more consistent perceived loudness.

This means that making your master extremely loud does not necessarily give you the advantage you might expect.

A very loud master can simply be turned down during playback.

LUFS vs dB: What Is the Difference?

You have probably seen dB everywhere in audio.

So what is the difference?

dB is used to describe levels and differences between levels. You will see it used for things such as peak levels, gain, volume, true peak and signal levels.

LUFS is specifically used for loudness measurement.

A simple way to think about it is:

dB = How big is the signal?

LUFS = How loud does the audio generally feel?

It is a simplified explanation, but it is a useful starting point for beginners.

What Is Integrated LUFS?

You will often see Integrated LUFS or LUFS-I.

Integrated loudness looks at the loudness of the audio over a longer period, often the entire song.

For example, imagine your song is three minutes long.

A meter can analyse the song from beginning to end and give you a number such as:

-12.5 LUFS-I

That number gives you a picture of the overall loudness of the track.

What Is Short-Term LUFS?

Short-term LUFS looks at a shorter window of audio.

This is useful because songs change.

Imagine your song has:

Verse → Chorus → Verse → Chorus

The chorus might be much louder than the verse.

Your integrated LUFS might say -14 LUFS, while the short-term loudness during the chorus could be considerably louder.

This helps an engineer understand what is happening inside the song rather than only looking at one number for the entire track.

What Is Momentary LUFS?

Momentary LUFS looks at an even shorter period.

It is useful for seeing what is happening right now.

For example, your song is playing. The verse is quiet. Then the chorus hits.

You might see the LUFS meter jump upward because the music has suddenly become louder.

You can think of the three measurements like this:

Momentary → What is happening right now?

Short-term → What is happening over the last few seconds?

Integrated → What is happening across the whole song?

What About True Peak?

You can have a reasonable LUFS measurement and still have problems with peaks.

That is why loudness and peak measurements should not be treated as the same thing.

LUFS tells you about loudness.

True Peak tells you about peak level.

Think of it like driving a car.

LUFS = How fast you are generally driving.

True Peak = Did you suddenly hit a dangerous speed at some point?

You need to look at both.

What Is Loudness Range?

You may also see something called LRA.

LRA means Loudness Range.

LRA helps describe how much the loudness changes throughout a piece of audio.

Imagine two songs.

Song A: The entire song stays almost the same loudness.

Song B: The verses are quiet, the chorus is loud, and the bridge gets very quiet before the final chorus becomes loud again.

Song B has much more variation in loudness.

Does Higher LUFS Mean Better Music?

No.

This is probably the most important lesson in this entire article.

A song at -8 LUFS is not automatically better than a song at -14 LUFS.

And a song at -14 LUFS is not automatically better than one at -18 LUFS.

LUFS is a measurement.

It is not a quality score.

A loudness meter cannot tell you whether your song is emotional, whether your chorus is exciting, whether your vocal performance is amazing or whether your mix makes people want to dance.

Those are artistic decisions.

Why Should Musicians Care About LUFS?

Because LUFS gives you information.

Instead of guessing:

“Is my song too loud?”

You can measure it.

Instead of wondering:

“Why is my master so much louder than my reference track?”

You can measure both.

Instead of saying:

“This sounds really loud.”

You can look at the loudness measurement and understand what is happening.

A meter does not replace your ears.

It gives your ears more information.

The Biggest Beginner Mistake

One of the biggest mistakes beginners make is chasing a number.

They might say:

“I need my song to be -8 LUFS.”

So they add more limiting.

Then more compression.

Then more gain.

Eventually the meter says:

-8 LUFS!

Success?

Maybe not.

They listen again and discover that the drums have lost their punch, the vocal is harsh, the song is distorted or the music feels flat.

The number looks good.

The music does not.

Do not let the meter become the boss of your ears.

A Simple Way to Think About LUFS

If you remember nothing else from this article, remember these four things:

1. LUFS measures loudness

It helps describe how loud audio is perceived over time.

2. More negative does not mean louder

-8 LUFS is louder than -14 LUFS.

3. Loud is not automatically better

A louder master can have less punch and dynamics if it has been pushed too hard.

4. LUFS is not a magic target

The right loudness depends on the music, mastering decisions and where the audio will be played.

So What LUFS Should My Song Be?

This is probably the question you actually wanted answered.

And the honest answer is:

There is not one magic LUFS number that makes every song correct.

Instead of asking:

“What LUFS number should I hit?”

Ask:

“Does my song sound good, and is it appropriate for the way it will be distributed?”

Check your:

Integrated LUFS
Short-term LUFS
Momentary LUFS
True Peak
Loudness Range
Dynamics

Then listen.

Compare your master against good reference tracks.

Make decisions based on the music, not just the number on the screen.

LUFS in One Sentence

If you are a complete beginner, here is the simplest definition:

LUFS is a way of measuring how loud audio sounds over time.

That is it.

You do not need to be an audio engineer to understand the basic idea.

And once you understand LUFS, you will start to understand why simply making a song louder is not always the answer.

Want to Check Your Music?

If you want to go beyond simply looking at a LUFS number, LoudCheck can analyse your audio and give you a broader picture of its loudness, dynamics, peaks and playback readiness.

Instead of asking only:

“How loud is my song?”

You can start asking:

“Is my song ready to be played back in the real world?”

Check your music with LoudCheck.