How to read the chart, use it in practice, and get the right key every time
A capo chart is a reference table that maps two inputs, the chord shapes you are playing and the fret your capo is placed on, to a single output: the actual sounding key. It answers the question every guitarist eventually asks: "If I put the capo here and play these shapes, what key am I in?"
The chart is a 12×12 grid. Rows represent the 12 possible open-position keys (the key of the chord shapes you are using). Columns represent fret positions 1 through 12. Each cell in the grid shows the resulting sounding key for that combination.
You can see the full interactive capo chart, every row, every fret, all 144 combinations, on the ChordSwitch Capo Calculator.
Reading the chart is straightforward once you understand the two axes.
The row (left column): This is the key of your chord shapes, the key you would be in if there were no capo at all. If you are playing G major, Am, D, and Em shapes, you are in the key of G. Find the G row.
The column (top row): This is the fret your capo is placed on. If your capo is on fret 2, find the Fret 2 column.
The cell where they meet: This is the key your guitar is actually sounding in. In the example above, G shapes, capo fret 2, the intersection shows A. So you are playing G shapes but your guitar is producing chords in the key of A.
The math behind it is simple: a capo on fret N raises the pitch by N semitones. The chart just does that addition for all 144 combinations so you do not have to.
Just as often, you already know the key you need to be in and you want to find which capo position gets you there from chord shapes you know. For this, use the chart in reverse.
Find the target key in the body of the chart. Then read left along that row to find the chord-shape key, and read upward to find the fret number. That is your answer: capo on that fret, play those shapes.
For example, you need to play in Bb. Scan the body of the chart for Bb. You will find it in several cells, because Bb is reachable from multiple combinations. Three common ones are: G shapes on fret 3, C shapes on fret 10 (less practical), or A shapes on fret 1. G shapes on fret 3 is by far the most common choice because G-position chord shapes are beginner-friendly and fret 3 is comfortable to play.
While the full chart covers all 144 combinations, most real-world playing concentrates around a handful of the most practical rows and frets. These are the combinations that professional and amateur guitarists rely on most.
G shapes, the most versatile row: The G row is arguably the most useful row in the entire chart because G, Am, Bm, C, D, and Em are beginner-friendly open shapes. Placing the capo at different frets on the G row reaches: A (fret 2), Bb (fret 3), B (fret 4), C (fret 5), D (fret 7). These cover many common song keys.
D shapes, great for major-key songs: D shapes (D, Em, F#m, G, A, Bm) are another comfortable set for beginners. Capo on the D row at fret 2 gives E, fret 4 gives F#, fret 5 gives G (same as no capo, just an octave character difference), and fret 7 gives A.
C shapes, naturally full-sounding voicings: C shapes (C, Dm, Em, F, G, Am) are often the first set a guitarist learns. Capo on fret 2 gives D shapes, fret 3 gives Eb, fret 5 gives F, fret 7 gives G. The C row is practical for songs with flowing, open-sounding voicings.
After 12 semitones, 12 frets, you have travelled a full octave and the note cycle repeats exactly. Capo on fret 12 with G shapes sounds like G, one octave higher than open G. In practice, this is not useful because fret 12 is where the neck meets the body of most guitars, leaving almost no room to play. Capos above fret 7 are used very rarely, mainly for deliberate tonal experiments, not for standard playing.
The capo chart answers a different question than a chord transposer. A chord transposer (like the Transpose tab on ChordSwitch) rewrites the chord names in a chart to reflect a new key. The capo chart tells you which fret and chord-shape combination gets you to that key without rewriting the chart at all.
Use the chord transposer when you need to share a chart with another musician and want the written chords to reflect the actual sounding key. Use the capo chart when you just want to know where to put the capo so you can play familiar shapes. For singers, combining both tools is common: transpose the chart to find a key that fits the vocal range, then use the capo chart to find the most comfortable way to play that key on guitar. Read the full guide on transposing chords for singers for how this workflow fits together.
Five notes in the chromatic scale have two names, C#/Db, D#/Eb, F#/Gb, G#/Ab, A#/Bb. The capo chart may display these using either sharp or flat notation depending on your preference. In the ChordSwitch capo calculator, the sharps/flats toggle at the top of the page controls which notation the chart uses. Both are correct; it is a matter of which convention the chart or song you are working from uses.
A capo chart tells you what key you will be playing in based on two inputs: the chord shapes you are using (the open-position key) and which fret the capo is placed on. Find your chord-shape key in the leftmost column, find the fret number along the top row, and the cell where they intersect shows the sounding key.
After 12 semitones the note cycle repeats exactly, you are back to the same note an octave higher. Capo on fret 12 with G shapes sounds like G again. In practice, capos above fret 7 are uncommon because the frets become very narrow and the resulting sound is thin. The chart stops at 12 because it covers one full octave, which is the complete picture.
Yes. Find the target key in the body of the chart, then read left to find the chord-shape key and upward to find the fret. That combination, capo on that fret, play those shapes, will put you in your target key.
The musical result, which key you are in, is the same for any capo on any given fret. The difference between capo brands is build quality: how evenly the clamping force distributes across the strings, how quickly the capo can be repositioned, and how much it affects intonation. A poor-quality capo may cause some strings to go slightly out of tune. The chart values are the same regardless of brand.
Yes. The semitone arithmetic is identical for any fretted instrument. Place the capo on a given fret, and the pitch rises by that many semitones. The capo chart values apply equally to ukulele, banjo, mandolin, or any other fretted instrument where a capo can be fitted.