B Major Scale: Answers to the Questions Students Ask

Why does B major need five sharps when C major, just a half step higher, needs none at all? Students ask me that question almost word for word, usually while staring at a key signature that looks like a fence of # signs. The answer explains how every major scale is built. B major is also one of the friendliest keys to play once you see what it's doing. Its seven notes are B, C#, D#, E, F#, G#, A#, and by the end of this page each of those sharps should feel necessary rather than scary.

Where do all those sharps come from?

Every major scale follows the same recipe of steps. A whole step is a jump of two piano keys, skipping the one in between. A half step is the smallest step in Western music, from one key to the very next, black or white. The major scale pattern is:

W - W - H - W - W - W - H

Start that pattern on B and see what it forces you to do:

• B up a whole step lands on C#, not C. C is only a half step away.
• C# up a whole step is D#.
• D# up a half step is E, a white key.
• E up a whole step is F#.
• F# up a whole step is G#.
• G# up a whole step is A#.
• A# up a half step brings you home to B.

So the sharps aren't decoration. The pattern needs them. C major happens to fit the white keys exactly. Start the same pattern on B and it pushes you onto five black keys.

Why A# and not Bb? Why D# and not Eb?

This is the spelling question, and it's a fair one. On a piano, A# and Bb are the same key. So why insist on A#?

The rule is that a major scale uses each letter name once: A, B, C, D, E, F, G, in order. B is already taken by the root, so the seventh note has to be some kind of A, and that makes it A#. The same goes for D#. C is already used as C#, and E comes next, so the third note must be a D.

It feels fussy at first, but it pays off. Every chord and interval reads cleanly. B to D# looks like a third on paper, and it is one. You may also see this scale written as Cb major, which sounds identical but is spelled with seven flats. Five sharps is less to keep track of, which is why B major is the version you'll almost always meet.

What's the key signature, and which keys are its relatives?

A key signature is the cluster of sharps or flats at the start of each line of sheet music, so you don't have to write them on every note. B major has five sharps: F#, C#, G#, D# and A#.

Its relative minor is G# minor. It shares the same seven notes and the same key signature, but it treats G# as home. Play the B major notes but rest on G#, and the mood turns darker and more wistful. Same notes, different center of gravity.

Here's a nice thing for pianists. B major uses all five black keys, C#, D#, F#, G# and A#, plus just two white keys, B and E. Long fingers sit naturally on the black keys and the thumb lands on the white ones. That's why some teachers, Chopin famously among them, liked to start students on B major instead of C.

Which notes give it its personality?

Two notes do most of the work: E, the 4th, and A#, the 7th.

A# sits just a half step below B. That makes it a leading tone, a note that sounds like it badly wants to rise to the root. Sing up the scale and stop on A#. You'll feel the tension right away. Your ear practically finishes the phrase for you.

E sits a half step above D#, the 3rd. It tends to lean down onto D#. Those two half steps, E to D# and A# to B, give major its settled, resolved brightness. Every other mode gets described by how it differs from this one.

What chords can I play in B major?

Stack every other note of the scale on each degree and you get seven chords. Roman numerals show their position, with capitals for major and lowercase for minor:

• I: B (B-D#-F#), or Bmaj7
• ii: C#m (C#-E-G#), or C#m7
• iii: D#m (D#-F#-A#), or D#m7
• IV: E (E-G#-B), or Emaj7
• V: F# (F#-A#-C#), or F#7
• vi: G#m (G#-B-D#), or G#m7
• vii°: A#dim (A#-C#-E), or A#m7b5

Notice that F# contains A#. That leading tone is why the V chord, and especially F#7, pulls so hard back to B. Try B - G#m - E - F# and loop it. You'll hear the F# chord leaning forward and the B chord catching it.

How does a melody behave in this key?

Melodies in B major tend to rest on B, D# and F#, the notes of the home chord. They pass through the others on the way. A line that climbs to A# and stops feels unfinished. A line that drops from E to D# feels like a sigh of relief.

Songwriters use this on purpose. They hold the A# at the end of a verse to build anticipation, then land on B as the chorus starts. Singers will find B major sits brightly in most voices, with a ringing, lifted quality.

How do guitarists find it on the neck?

On a standard-tuned guitar, the root B sits at the 7th fret of the low E string, and again at the 19th. On the A string you'll find it at the 2nd fret and the 14th. Start the step pattern from any of those spots and walk it up one string. Saying the note names out loud, sharps included, will lock the spelling in fast.

What should I try first?

Sing or play B, C#, D#, E, F#, G#, A#, then stop. Hold that A# for four slow beats before you let it rise to B. Then play the F#7 chord and let it resolve to B. Pay attention to how the pull of that single note feels.

For the bigger picture, read The Major Scale (Ionian Mode).