The B7 chord on ukulele is a dominant-seventh built from B (root), D# (major 3rd), F# (5th) and A (minor 7th), and it shows up whenever you need a strong push to the E family or a color change in blues and pop progressions. With re‑entrant G–C–E–A tuning, the fastest, most usable B7 shapes fit into the first five frets and offer clear voice‑leading to E, Em and common neighboring chords.
Primary open-position B7 — 2‑3‑2‑2 (string-by-string)
String order G–C–E–A = frets 2‑3‑2‑2. That reads as G2, C3, E2, A2, producing the notes A (7th), D# (3rd), F# (5th), B (root). Finger it with index barring the E and A strings at fret 2 and middle finger on C3; or use index on G2, middle on C3, ring on E2 and pinky on A2 if you prefer no partial bar. Choose the barre for speed; choose separate fingers for clarity when you need cleaner single‑note lines.
This shape is the go‑to rhythm voicing because it places the 7th on the top G string and keeps the root and 3rd close together on adjacent strings, so your right hand outlines the chord tone order naturally while your left hand stays compact.
Root‑on‑top variant — 4‑3‑2‑2 (fuller root doubling)
String order G–C–E–A = frets 4‑3‑2‑2. That gives B (root) on the high G, D# on C3, F# on E2 and B on A2, doubling the root on top for a brighter, fuller voicing. Play it with pinky on G4, middle on C3, and index barring E2/A2 at fret 2. Use this when you want the B note to ring out on top or when you’re arranging for a singer who needs the chord to sound grounded in B.
Choose the root‑on‑top shape for breaks and riffs where the high B helps your melody sit above the harmony while the left hand remains nearly static.
Compact triad option — mute G / x‑3‑2‑2 (clear triad sound)
String order G–C–E–A = x‑3‑2‑2. Mute the G string with the tip of your index or the heel of your thumb so only C3 (D#), E2 (F#) and A2 (B) ring. This produces a tight triad-plus-root sound that drops the dissonant 7th if you need a cleaner major quality. Finger with middle on C3 and index barring E2/A2, or use separate fingers for quick changes.
Use this when you’re comping under a vocalist who prefers a less tense color or when you need faster changes without the extra 7th ringing.
Handy fingering swaps and thumb/finger placement tips
To avoid buzz: keep fingertips close to the fretwire and angle the fretting fingers so they press down with the thumb behind the neck for leverage. If a string buzzes, roll the finger slightly toward the fingertip and press just a bit harder; the smallest shift often fixes it.
For clean mutes, rest the thumb lightly on the G string when you want to mute it, or lay the underside of the index across the G string tip to silence it while fretting C3‑E2‑A2. Use this on the x‑3‑2‑2 triad to keep the 7th out of the texture.
Moving B7 → E: lift the pinky or ring, slide the index off the E/A barre and place the shape for E (open 1‑4‑0‑2 or 1‑4‑0‑2 variant) in one fluid motion; practice the slide slowly then pick up tempo. Moving B7 → Em: release the middle finger from C3 down to an open C while keeping the E2/A2 fingers steady, and you’ve created a smooth voice‑leading to Em.
Index‑bar technique vs individual fingers: use a partial bar across E/A at fret 2 when speed matters and the chord needs to ring. Use individual fingers when you need cleaner single‑string lines or when the bar causes ringing on adjacent strings.
Why B7 feels tense: dominant‑seventh theory made simple for uke players
Structure: B (root), D# (3rd), F# (5th), A (minor 7th). That A sits a whole step below the root and creates a pull; it wants to move to G# (which is the 3rd of E) or to resolve down to the root in cadences. That push is the characteristic tension of a dominant‑seventh chord.
As a dominant (V7), B7 most often resolves to E major or E minor, because the D# wants to resolve up to E and the A wants to step down to G# or G depending on context. That motion is what listeners perceive as resolution.
Secondary dominant uses: B7 can act as V7/Em when it precedes an Em chord, temporarily treating Em as the tonal center. It can also behave as V7/V in longer progressions, creating a brief brightening that sets up further movement. Practically: try the progression Em → B7 → Em to hear B7 yank the ear toward a minor tonic.
Practical B7 voicings and inversions for different musical textures
Low‑neck voicings: use shapes that include a low B or doubled B in the lower strings for a thicker, bassy sound. When you need weight, favor voicings that emphasize the A (7th) on the G string plus the root on the A string or a lower octave if using low‑G tuning.
Mid‑neck voicings: place the root or 3rd in the middle register to smooth transitions across the fretboard. Move the compact shapes up a few frets while keeping intervals intact; this keeps voice‑leading tight and avoids muddy low frequencies.
High‑neck voicings: use voicings with the root or 7th on the high G string to brighten the chord and cut through in solo or small‑ensemble settings. The 4‑3‑2‑2 voicing is a classic high‑neck choice.
Inversions and note order matter: root position (root in bass) sounds stable, 3rd in bass colors the chord brighter, 7th in the top or bass increases tension. For smoother voice‑leading, reorder notes so common tones stay on the same string when moving between chords.
Two‑note and three‑note fragments: play the 3rd+7th (C3 & G2 in the primary shape) as a dyad to suggest B7 with minimal motion. Triads like x‑3‑2‑2 outline the harmony while freeing up fingers for melodic fills.
B7 variations and color chords: spices that keep your comping interesting
B7b9 (2‑3‑2‑3) is made by fretting G2, C3, E2 and A3; the A3 is the C natural that creates a b9 against the root. Use this when you want harsh chromatic tension heading to E or Em in a bluesy or jazzier passage.
B7#5 (2‑3‑3‑2) alters F# to G on the E string fret 3, producing a raised fifth; use it as a sharped color before resolving downward to E or to imply altered dominant motion into minor or major tonics.
B7sus4 (2‑4‑2‑2) replaces the major 3rd with the 4th (C4 = E), giving a suspended sound that resolves naturally to the regular B7 shape; finger with middle on C4 and keep the E/A barre at 2.
Simplified soulful options: use x‑3‑2‑2 to remove the 7th, or mute the C string and play 2‑x‑2‑2 (7‑x‑5‑root) to emphasize root and 7th while leaving the 3rd out when a vocalist needs a more ambiguous harmony.
Quick modulations: a B7#5 or B7b9 works well as a chromatic approach into E or Em. Drop the altered tone on the spot of the cadence and then resolve the chord tones by step into the target chord.
How B7 fits into real progressions and song forms
I–IV–V and 12‑bar blues: in an E‑based 12‑bar, you’ll commonly see E7 — A7 — B7 as the I7‑IV7‑V7 cycle. On ukulele, treat B7 as the dominant that drives the turnaround and use short, rhythmic chunks to mark bar changes.
Turnarounds and cadences: use B7 on the last bar before I to create momentum; add a b9 or #5 on the penultimate measure to add lift. Examples: | A7 | E7 | B7 | E7 | with a B7#5 on the third bar for chromatic color.
Pop and folk usage: slip in B7 as a secondary dominant to brighten a minor or major phase. Substitute a B7 for a plain B or Bm in bridges to add motion without changing the song’s basic structure.
Strumming, rhythm patterns and comping ideas that make B7 groove
Ballad pattern: down‑down‑mute‑up‑down (count 1 & 2 &, mute on the third beat). Play B7 on beats 1 and 3 for tension into the next chord; let ring on the backbeat for a breathing, open feel.
Up‑tempo pattern: chunk on the downbeat and play light up‑strums on offbeats, e.g., down‑mute‑up‑up‑mute. Use palm or thumb muting on the chunks to create percussive drive while keeping chord tone clarity on the offbeats.
Pocket comping: ghost strums on weak beats and a full B7 on strong beats. Place the B7 on the “and” of 2 into the downbeat of 3 to maximize perceived tension before resolution.
Arpeggio/fingerstyle: outline 7‑3‑5‑root in descending order for a directional sound: pick G→C→E→A or reverse for a rising figure. Use the thumb for the bass note (A string) and fingers for higher strings to keep separation.
Re‑entrant (high‑G) vs low‑G tuning: how B7 voicings change tone
On high‑G ukuleles the same B7 shape feels brighter and more treble‑forward because the high G sits above the C and E; the 7th will often cut through as a bell‑like top note. Favor root‑on‑top and high‑neck voicings if you want presence.
On low‑G instruments the B7 takes on more body; the low G adds a bassier 7th or octave that fills out the chord. Swap to mid‑neck voicings or mute the low G if the chord becomes too muddy in ensemble settings.
Practical adjustment: if a high‑G voicing sounds thin on low‑G, move the root lower or double the root on the A string; if low‑G booms, mute the G string or play the x‑3‑2‑2 triad for clarity.
Troubleshooting B7: fix buzzing, muted notes and awkward stretches
Quick checklist: press nearer the fretwire, angle fingertips, shorten nail length on your fretting hand, and check string action. Buzz often comes from a rounded finger pad or being too far from the fret.
If stretches hurt, use the triad x‑3‑2‑2 or partial bars; use a capo higher on the neck to reduce stretch and keep the same shapes relative to your hand. If the pinky won’t reach, replace it with an index barre across E/A and shift the other fingers accordingly.
Decide when to simplify: choose partial voicings for fast changes or for singer‑friendly comping; choose fuller voicings when you have time to set your left hand and want the full dominant color.
Practice drills and short exercises to own B7 in every key
Switching drill: set metronome at 60 bpm. Play two bars B7, two bars E, then speed up by 5 bpm every minute. Focus on keeping common fingers down during the change to reduce wasted motion.
Movable‑shape practice: use the compact triad x‑3‑2‑2 as a template and slide it up the neck to learn interval relationships, then add the 7th above or below the triad to hear inversion effects.
Mini‑set: pick three short tunes in keys that put B7 in different roles — as V7, as secondary dominant, and as a blues V7. Practice each at two tempos for durability and musical context.
Song‑ready examples and play‑along tips
Use B7 in a 12‑bar blues at medium tempo: set tempo to 90–110 bpm, play E7 for four bars, A7 for two, E7 for two, B7 for one bar, A7 for one bar, E7 for one bar, B7 for one bar as turnaround. Strum pattern: down‑chunk on the 1 and 3, light upstrokes on offbeats.
Adapt guitar B7 parts to ukulele by prioritizing the chord tones rather than exact voicings; if a guitar part doubles the root in low strings, substitute the 4‑3‑2‑2 root‑on‑top voicing on uke to keep the melody visible while preserving harmonic function.
Play‑along suggestion: pick a backing track in E at 120 bpm, place B7 on the V bars and practice switching cleanly between B7 → E and B7 → Em with the syncopated rhythm patterns above.
Capo and transposition hacks: make B7 easier and singable
Use a capo to move the B7 shape up the neck into a friendlier hand position or to match a singer. For example, capo at 2 and play A7 shapes to function as B7 relative to the original key; this keeps fingerings simple while changing pitch.
Quick transpose rule: to keep B7 as V7, move the whole progression by the same capo interval. If you raise the key by 2 semitones with a capo, a playable A7 shape will now function as B7 relative to the new key.
When transposition changes chord function, check voice‑leading: a capoed shape might shift the bass motion; preserve harmonic intent by ensuring the dominant still resolves to the intended tonic or substitute an inversion that keeps the same bass movement.
