Transposing means playing the same music starting on a different note. Every note moves by the same distance, so the tune and the harmony sound the same, just higher or lower.
Step 1: count the distance in half steps
A half step (or semitone) is the distance from one key on the piano to the very next one, black or white. Count from the old key to the new one:
- 0 C
- 1 C♯/D♭
- 2 D
- 3 D♯/E♭
- 4 E
- 5 F
- 6 F♯/G♭
- 7 G
- 8 G♯/A♭
- 9 A
- 10 A♯/B♭
- 11 B
From C to E♭ is three half steps up. From G to E is three half steps down. Either direction works; pick the one that keeps the music in a comfortable range.
Step 2: change the key signature
| Key | Key signature |
|---|---|
| C major / A minor | none |
| G major / E minor | 1 sharp |
| D major / B minor | 2 sharps |
| A major / F♯ minor | 3 sharps |
| E major / C♯ minor | 4 sharps |
| B major / G♯ minor | 5 sharps |
| F major / D minor | 1 flat |
| B♭ major / G minor | 2 flats |
| E♭ major / C minor | 3 flats |
| A♭ major / F minor | 4 flats |
| D♭ major / B♭ minor | 5 flats |
| G♭ major / E♭ minor | 6 flats (or F♯ major, 6 sharps) |
Step 3: move every note the same distance
Go through the music note by note and move each one by your count. Two habits save a lot of mistakes:
- Think in scale degrees. If a note is the third of the old key, it becomes the third of the new key. In C, E is the third; in D, F♯ is the third.
- Watch the accidentals. A sharp, flat or natural written in the music is moved too, and it may change type. A B♮ in F major (a raised fourth) becomes a C♯ in G major.
Step 4: move the chords
Chord symbols move by the same count. In C, the chords C, F, G and Am moved up two half steps become D, G, A and Bm. Slash chords move both letters: G/B becomes A/C♯. The free chord transposer does this for a whole chart.
Which keys are easiest on the piano?
C, G, D and F are the usual starting points for beginners because they have few black notes. Some pianists find keys with several flats, such as E♭ or A♭, sit well under the hand because the black notes fall naturally under the longer fingers. If you are transposing to make a piece easier, try the nearest of C, G, F or D first.
Common reasons to transpose
- A singer needs the song lower or higher.
- A congregation needs a song brought down from the recording’s key.
- A student needs fewer sharps or flats.
- Playing alongside a guitarist using a capo, or a transposing instrument.
The fast way
If the music started as a recording, turn it into sheet music and change the key in one click: the notes, key signature and accidentals are all rewritten, and the PDF follows. See play it in any key.