Learn › Bmaj9 Chord on Piano (B Major 9th)
New Released in April 2026
Bmaj9 Chord on Piano (B Major 9th)
Bmaj9, the B major 9th chord, is the major seventh Bmaj7 plus the 9th, C#. Its notes on the piano are B, D#, F#, A# and C#. In one phrase: soft, dreamy and very open.
No account, no download. The demo has limited content. Advanced features are in ChordRunner Premium.
- MIDI keyboard
- Digital or acoustic piano
- Guitar
- Computer, phone or tablet
A second name for the same keys
Look at the four top notes of Bmaj9: D# F# A# C#. They form D#m7. So Bmaj9 is B in the bass with D#m7 on top, an easy way to find it fast.
Building Bmaj9 from Bmaj7
Start from Bmaj7, which you may already know, and change one thing: add C# above the major seventh.
Start chord: Bmaj7
| Note | Step | Interval | Keys from B |
|---|---|---|---|
| B | 1 | root | 0 |
| D# | 3 | major 3rd | 4 |
| F# | 5 | perfect 5th | 7 |
| A# | 7 | major 7th | 11 |
| C# | 9 | major 9th | 14 |
Ways to place Bmaj9 on the keys
Each picture is still Bmaj9. Move only the notes that must move.
Both hands: B A# D# F# C#
Rootless, 3rd on the bottom: D# F# A# C#
Rootless, 7th on the bottom: A# C# D# F#
Left hand alone: B A#
Which fingers
| Left hand | B A# | 5 1 |
|---|---|---|
| Right hand | D# F# C# | 1 2 4 |
A short Bmaj9 routine
- Say the notes out loud while you press them: B, D#, F#, A# and C#.
- Switch between Bmaj7 and Bmaj9 ten times without looking at your hand.
- Try Bmaj9 in a rootless shape with the 3rd on the bottom, the position that sits closest to your last chord.
- Last, meet Bmaj9 mixed with chords you already know, in an order you did not plan.
Come back to Bmaj9 tomorrow: short daily sessions beat one long one.
Where Bmaj9 is used
- Bmaj9 is the I chord of B major and the IV chord of F# major.
- It replaces Bmaj7 when a song wants a softer, wider sound.
Play Bmaj9 in a game
Chord symbols arrive one after another and the game checks every note you play, with MIDI or the microphone. Major and minor 9ths have their own level, "Ninth Chords".
Play the demoCommon questions
What is Bmaj9 on the piano?
Bmaj9 is the B major 9th chord: B, D#, F#, A# and C#, the major seventh Bmaj7 plus the 9th, C#.
Is Bmaj9 the same as D#m7?
Not quite: D#m7 (D# F# A# C#) is only the upper part of Bmaj9. Add B underneath and you have the full Bmaj9.
Where is Bmaj9 used?
Bmaj9 is the I chord of B major and the IV chord of F# major. It replaces Bmaj7 when a song wants a softer, wider sound.
Can I practise Bmaj9 with a MIDI keyboard or a real piano?
Yes. In ChordRunner a USB MIDI keyboard is detected automatically, and an acoustic or digital piano works through the microphone. The game checks that B, D#, F#, A# and C# sound together.
Your instrument is the controller.
ChordRunner is a browser game that teaches piano and guitar chords: a chord appears on screen, you play it on a real instrument, and your runner jumps. MIDI keyboard or microphone, both work.
Try the demoKeep learning
Piano Chord Chart: Every Chord in All 12 Keys
Piano chord chart with the notes of 288 chords: major, minor, 7ths, 9ths, sus and more in all 12 keys. Click a…
Extended Chords: 9ths, 11ths, 13ths
How 9th, 11th and 13th chords are built, what to leave out, and a game that drills every extension on your MID…
Badd9 Chord on Piano (B Add 9)
The B add 9 chord Badd9 on piano: B D# F# C#, built from B, compared with nearby chords.…
B9 Chord on Piano (B Dominant 9th)
B9 chord on piano: notes B D# F# A C#, formula 1 3 5 b7 9, fingering, D#m7b5 and where it is used.…
Bm9 Chord on Piano (B Minor 9th)
The B minor 9th chord Bm9 on piano: B D F# A C#, built from Bm7, compared with nearby chords.…
Chord Training That Feels Like a Game
Interactive chord training in your browser. Play major, minor, 7th and extended chords on a MIDI keyboard or a…