B Mayor Acorde

A bright, happy triad built from a root, major third, and perfect fifth.

B Acorde — Quick Answer & Harmonic Definition

The B (Major) chord consists of the notes B, D#, F#. It is constructed from the root note B using the major interval formula (0–4–7 semitones).

Formula: 0 – 4 – 7

Notes

B – D# – F#

Intervals (semitones)

0 – 4 – 7

Type

Triad

B on Piano

Press highlighted keys simultaneously to play the B chord.

B (Root (R))

D# (Major 3rd)

F# (Perfect 5th)

B on Guitar

Fret numbers (low E → high e string): x24442 (x=mute, 0=open)

Interval Analysis

Degree	Interval Name	Semitones	Note in B
Root	Root (R)	0	B
3rd	Major 3rd	4	D#
5th	Perfect 5th	7	F#

About the B Mayor Chord

The B chord (B Mayor) consists of 3 notes: B, D#, F#. A bright, happy triad built from a root, major third, and perfect fifth.

To build any major chord, apply intervals of 0, 4, 7 semitones above the root. Starting from B: the notes land on B, D#, F#.

Playing B on Piano

Press B, D#, F# simultaneously. In root position, B is lowest. First inversion places D# in the bass for a lighter sound; second inversion uses F# as the bass note.

Common Chord Progressions Using B

I–IV–V: B – E – F# (blues and rock)
I–V–vi–IV: B – F# – G#m – E (pop staple)
I–vi–IV–V: B – G#m – E – F# (50s progression)

The B Chord in Context

As a major chord, B serves as the tonic (I) in the key of B major. It also appears as the IV chord in F# major, and as the V chord in E major — making it one of the foundational primary triads in Western harmony.

Other B Chords

Mayor Chord in All 12 Keys

C C# D D# E F F# G G# A A# B

Knowledge Base & FAQs

B Chord — Frequently Asked Questions

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What notes are in the B chord?

The B Mayor chord contains: B, D#, F#.

These notes are derived by applying the major interval formula (0–4–7 semitones) to the root note B.

What is the B chord used for?

A bright, happy triad built from a root, major third, and perfect fifth.

The B chord is used across pop, rock, jazz, and classical music. As the I chord in the key of B major, it functions as the most stable resting point in progressions.

How do you play B on piano?

On piano, play B, D#, F# simultaneously.

In root position, B is the lowest note. Inversions move the bass note up — first inversion has D# lowest, second inversion has F# lowest.

How many notes are in a major chord?

A major chord has 3 notes: B, D#, F# (in B).

It is a triad — the most fundamental chord type.

What is the difference between B major and B minor?

The B major chord (B–D#–F#) uses a major third (4 semitones), giving it a bright, happy sound.

The B minor chord (B–D–F#) uses a minor third (3 semitones), giving it a darker, emotional sound.

What key does B belong to?

B naturally serves as the I chord in the key of B major.

It also appears as IV in the key of F# major, and as V in the key of E major.

Can I play B on ukulele?

Yes.

The ukulele uses GCEA tuning with 4 strings. The B chord notes (B, D#, F#) can be fretted on a ukulele, though the shapes differ from guitar due to the 4-string layout and shorter scale.

What chords go well with B?

In the key of B major, B pairs naturally with E major (IV), F# major (V), and G#m (vi).

The classic I–IV–V (B–E–F#) is the foundation of blues, country, and rock.

What is a chord inversion of B?

An inversion places a non-root note in the bass.

B root position: B in bass. First inversion: D# in bass. Second inversion: F# in bass. Inversions create smoother bass line movement without changing the harmony.

How do I memorize the notes in a major chord?

Remember the formula: 0–4–7 semitones from root.

For B: start on B, add 4 semitones, then 7 semitones. Practicing this across all 12 roots builds instant recognition of any major chord.