Capo Calculator
Pick the key the song needs to sound in. Get every capo position that lets you play it with the open shapes you already know, and see exactly what each chord becomes.
The idea
A capo is a moveable nut. Clamp it at fret 3 and every shape you play sounds three half steps higher, fingering unchanged. So any key, even the flat-heavy ones singers love, can be played with comfortable open shapes. The only question is where to clamp, and that's just subtraction. This tool does the subtracting.
How to read it
Each card is one option: the capo fret, the shape family you'd play, and the translation table showing what every open chord sounds as. "Play C, hear Eb" means your hands make the C shape while the room hears Eb. Lower capo positions keep more warmth and sustain; past fret 7 things get tight and boxy, so those options are dimmed.
How to use it
Got a chord chart full of barre chords? Find its key here and pick the option whose shapes you like best. Backing a singer who moved the song up a step? Slide the capo up two frets and change nothing else. Playing with another guitarist? Each of you takes a different card: same chords, two different voicings, instant width.
Play D shapes
Sweet and chimey up top: D, G and A with that singing high end.
left: what your hands play · right: what the room hears
Play C shapes
The gentlest set: C, F and G with all the ringing open strings.
left: what your hands play · right: what the room hears
Play A shapes
Bright and easy: A, D and E, three of the friendliest grips there are.
left: what your hands play · right: what the room hears
Play G shapes
The campfire king: G, C, D and Em, big open voicings.
left: what your hands play · right: what the room hears
Fret 8 is a squeeze: playable, but tight and thin. Try a lower option first.
Play E shapes
The rock set: E, A and B7 territory, thick low-string power.
left: what your hands play · right: what the room hears
Fret 11 is a squeeze: playable, but tight and thin. Try a lower option first.
One guitarist takes capo 1 with D shapes, the other capo 3 with C shapes. You're both in Eb, but the voicings stack instead of colliding. Instant record-sized sound with two acoustic guitars.
Free capo calculator: play any key with easy open chords
Tell the calculator the key your song sounds in, and it shows every capo position that lets you play it with the open chord shapes you already know. Each option lists the shape family, the capo fret, and a full translation of what every chord becomes, plus a two-guitar layering tip for a bigger sound.
How to use the capo calculator
- Choose the key the song needs to sound in.
- Read each capo position and the open-shape family it uses.
- Check the translation table: the left column is what your hands play, the right is what the room hears.
- Pick a position at fret 7 or lower for the warmest, fullest sound.
Frequently asked questions
- What does a capo actually do?
- A capo raises the pitch of every string equally, so a familiar chord shape sounds in a higher key with no new fingering.
- Where should I put my capo for a given key?
- Enter the key the song sounds in and the tool lists every capo fret and the open shapes that play it.
- Can two guitarists use different capo positions?
- Yes. The two-guitar tip pairs two positions in the same key so the voicings stack instead of clashing.
- Is the capo calculator free?
- Yes, with no account and no ads.