HOW TO TRANSPOSE CHORDS. count the steps, move them all

Transposing means moving a whole song up or down to a new key, with every chord moved by the same amount. The song keeps its shape: the melody, the progression and the feel are all the same, just higher or lower.

There are three common reasons to do it. A singer needs it: a song written for one voice can sit too high or too low for another, and a step or two can make all the difference. A player needs it: a song in E♭ or B is full of barre chords on guitar, while the same song in D or G is open shapes. And a band needs it: songs in a set sound better when the keys flow, and a horn or a capo might want a particular key.

You don’t need much theory to transpose. You need the twelve notes in order and the ability to count. The method below works for any chord in any key.

All of Western music uses the same twelve notes, each a semitone (one fret on a guitar, one key on a piano, black keys included) from the next. After the twelfth note the cycle starts again:

C, C♯/D♭, D, D♯/E♭, E, F, F♯/G♭, G, G♯/A♭, A, A♯/B♭, B, then C again.

Note that there is no sharp between E and F, or between B and C. Those pairs are already a semitone apart. Most mistakes in transposing come from forgetting that.

G to A, up 2 semitones. G, C, D, Em becomes A, D, E, F♯m. Common when a singer wants a song a little brighter.

B to A, down 2 semitones. B, E, F♯, G♯m becomes A, D, E, F♯m. The screenshot shows exactly this: the Studio’s demo song is in B, and two clicks on the Key control’s minus move it to A, with every chord on the chart re-spelled.

E to G, up 3 semitones. E, B, C♯m, A becomes G, D, Em, C. A guitarist’s favourite move: four barre-heavy chords turn into four open ones.

Going down a long way? It can be easier to go up the other way. Moving down 5 semitones lands on the same note names as moving up 7, just an octave apart. For chord names, they’re the same.

If you’re transposing for a voice, the hard part is choosing the new key, not moving the chords. Sing the highest line of the song, usually the end of the chorus or the bridge, along with the record. If you strain, the key needs to come down. If the verses sit so low they mumble, it needs to come up.

Move one semitone at a time and sing that same line again. Most people find a key that suits them within two or three semitones of the original. Go too far and the song loses its character: a bright anthem dropped five semitones can sound sleepy.

Write the new key at the top of the chart once you’ve found it, so the band knows. And if the song changes key partway, move both keys by the same amount: a lift from G to A becomes a lift from F to G when you take the song down two.

Every black key has two names: C♯ is also D♭. After transposing you’ll often have to choose. The rule of thumb is to use the names the new key uses. Keys of G, D, A, E and B use sharps, so write F♯m and C♯m. Keys of F, B♭, E♭ and A♭ use flats, so write B♭ and E♭, not A♯ and D♯.

A good check: in a major key each letter A to G appears once in the scale. If your chart has both an A and an A♯ in a key that should have a B♭, you picked the wrong name.

Chord Lens spells chords for the key automatically when you move it, and you can override it: the chord sheet has Auto, Sharps and Flats.

On guitar, ukulele or mandolin, a capo transposes for you. Each fret raises everything one semitone, so you keep the shapes you know and the sound moves up. Playing G shapes with a capo on the 2nd fret sounds in A. Our capo chart lists every fret and key.

In the Chord Lens Studio, Change Song Key does the whole job at once. Press plus or minus on the Key control and the song moves a semitone at a time, up to 12 either way. The recording moves with it, so you hear the new key while you play, and every chord on the chart and every shape above it is re-spelled. Set a capo in the chord panel on guitar, ukulele or mandolin and the shapes change to match while the key stays put.

If you think in numbers, the Nashville number system makes transposing almost free: the chart never changes, only the key at the top.