The short version
- B♭5 is B flat five, also written A♯5. Its notes are B♭ and F (formula 1 – 5).
- Easiest way to play it: a no-barre shape at the 1st fret, frets x 1 3 3 x x from low E to high E (x = don’t play).
- It sounds loud, neutral and heavy. Use it with distortion, palm-muted, sliding up and down the neck. On a clean guitar it sounds a little bare, which can be the point.
- B♭5 turns up in 12 keys: F♯ major (as the III5), D♭ major (as the VI5), A♭ major (as the II5), E♭ major (as the V5) and B♭ major (as the I5), and more in the table below.
- Try it in: B♭5 – A♭5 – E♭5 – B♭5, the riff your neighbours already know through the wall.
How to play B♭5 on guitar, step by step
Start with the shape marked “Start here” above: the power chord, root on the 5th string (fret 1).
- Put your index finger on fret 1 of the 5th (A) string.
- Put your middle finger on fret 3 of the 4th (D) string.
- Put your ring finger on fret 3 of the 3rd (G) string.
- Don’t play the low E, B and high E strings: skip them, or touch them lightly with a spare finger so they can’t ring.
- Strum from the 5th (A) string down, then press Strum on this page to check it sounds the same.
Once that’s comfy, try the other shape. Shape 2 is the power chord, root on the 6th string (fret 6): 6 8 8 x x x. Same chord, different spot on the neck, which helps when the next chord lives nearby.
Slide it around: this shape has no open strings and no barre, so the same fingering works on any fret. Move it up two frets and it becomes C5. One shape, twelve chords, zero extra homework.
Notes in the B♭5 chord
B♭5 is built from 2 notes. On guitar you’ll often play some of them twice, on different strings. That’s normal; the chord is still B♭5.
| Note | Interval | What it does |
|---|---|---|
| B♭ | 1 root | Names the chord and anchors the bass. |
| F | 5 perfect fifth | Adds weight; often the first note left out. |
What B♭5 sounds like, and when to use it
Root and fifth, no third, so it’s neither major nor minor. It’s just loud. The power chord is the entire personality of rock, punk and metal. Use it with distortion, palm-muted, sliding up and down the neck. On a clean guitar it sounds a little bare, which can be the point.
What key is B♭5 in?
B♭5 turns up in 12 keys: F♯ major (as the III5), D♭ major (as the VI5), A♭ major (as the II5), E♭ major (as the V5) and B♭ major (as the I5), and more in the table below. Tap a key to see the rest of its chords on the circle of fifths.
| Key | Numeral | Spelled as |
|---|---|---|
| F♯ major | III5 | A♯5 |
| D♭ major | VI5 | B♭5 |
| A♭ major | II5 | B♭5 |
| E♭ major | V5 | B♭5 |
| B♭ major | I5 | B♭5 |
| F major | IV5 | B♭5 |
| E♭ minor | V5 | B♭5 |
| B♭ minor | I5 | B♭5 |
| F minor | IV5 | B♭5 |
| C minor | VII5 | B♭5 |
| G minor | III5 | B♭5 |
| D minor | VI5 | B♭5 |
Chords that go with B♭5
Here’s a progression to try: B♭5 – A♭5 – E♭5 – B♭5 (I5–♭VII5–IV5–I5), the riff your neighbours already know through the wall.
More progressions → Transpose it →
Using B♭5 in a Suno prompt
Suno pays attention to chord names in a style prompt, at least some of the time. Put the progression in, keep the BPM, and let it fill in the rest. Then compare its guitar part with the shapes above.
Pop punk, 168 BPM, chord progression B♭5 – A♭5 – E♭5 – B♭5, palm-muted power chords, distorted guitars, fast punk drums, shouted gang vocals, energetic
B♭5 chord FAQ
What notes are in the Bb5 chord?
B♭5 has 2 notes: B♭ (the root) and F (the perfect fifth). The chord formula is 1 – 5.
How do you play Bb5 on guitar?
The easy way is power chord, root on the 5th string (fret 1). Strings from low E to high E: x 1 3 3 x x (x means don’t play that string). Put your index finger on fret 1 of the 5th (A) string. Put your middle finger on fret 3 of the 4th (D) string. Put your ring finger on fret 3 of the 3rd (G) string. Don’t play the low E, B and high E strings: skip them, or touch them lightly with a spare finger so they can’t ring.
Is Bb5 the same as A#5?
Yes. B♭5 and A♯5 are the same chord with the same fingering. They are just spelled differently. You’ll see A♯5 in sharp keys and B♭5 in flat keys.
What key is Bb5 in?
B♭5 turns up in 12 keys: F♯ major (as the III5), D♭ major (as the VI5), A♭ major (as the II5), E♭ major (as the V5) and B♭ major (as the I5), and more in the table below. Major keys: F♯ major, D♭ major, A♭ major, E♭ major, B♭ major, F major. Minor keys: E♭ minor, B♭ minor, F minor, C minor, G minor, D minor.
What is the difference between Bb5 and Bb?
B♭5 is just the root and fifth (B♭ and F). B♭ adds the major third (D), which makes it sound clearly happy. Without the third, a power chord stays neutral, which is why it sounds so good with distortion.
What chords go well with Bb5?
Try E♭5, F5, A♭5 and G♭5. The progression B♭5 – A♭5 – E♭5 – B♭5 (I5–♭VII5–IV5–I5) is the riff your neighbours already know through the wall. Press Play progression on this page to hear it.
Other power chord chords
Got the chord? Now write the song
The free Paddy Prompt Studio turns a genre, mood and chord progression into a ready-to-paste Suno style prompt. No signup.
Open the Prompt Studio →