The Circle of Fifths, Built for Guitar
Spin the wheel to find every chord, capo position, and pentatonic scale for any key. Free, works offline, no account needed.
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Spin the Wheel, Change the Key Instantly
Most circle of fifths charts are static images you have to decode. This one is different. Spin the wheel with your finger — clockwise for sharps, counter-clockwise for flats — and every chord, scale, and capo suggestion updates in real time. It's the fastest way to transpose on the fly, whether you're in a jam session or working out a cover at home.
See Every Chord in the Key at a Glance
The highlighted window always shows the 7 diatonic chords of your current key — triads and seventh chords. The Roman numeral labels (I, ii, iii, IV, V, vi, vii°) tell you the function of each chord instantly. No more counting intervals or memorizing formulas. Just spin to your key and the chords are right there.
Find the Right Capo Position for Any Key
Playing in B major with open chord shapes is awkward. Capo 2 with A shapes isn't. The capo tool shows you every practical capo position for your key — which fret, which open chord shapes to use, and what the sounding chords will be. It covers all six standard open shapes: E, A, D, G, C, and B.
All 5 Pentatonic Box Positions on One Fretboard
Every key has 5 pentatonic box positions covering the entire neck. The neck view shows all 5 simultaneously, color-coded so you can see how they connect. Root notes are marked. Toggle between sounding pitch and fingered position when using a capo. Whether you're learning your first scale or connecting positions across the neck, it's all here.
Start Playing in 10 Seconds
Spin to your key
Drag the wheel to the key you're playing in. The diatonic chords appear instantly in the highlighted window.
Find your chords
Tap the Chords tab to see triads and 7th chords with Roman numeral analysis. Choose from 26 common progressions.
Pick up your guitar
Use the capo suggestions or neck view to find the most comfortable way to play the key. No theory knowledge required.
Frequently Asked Questions
Is this free?
Yes, completely free. No account, no subscription, no ads cluttering the interface.
Does it work offline?
Yes. Once you've opened it once, it works without an internet connection. Add it to your home screen for instant access.
Do I need to know music theory to use this?
Not at all. You can use it purely as a chord finder — spin to your key, see which chords sound good together. The theory labels are there if you want them, not in the way if you don't.
What is the circle of fifths?
It's a diagram that organizes all 12 musical keys by how closely related they are. Keys next to each other share almost all the same notes, which is why chord progressions that move around the circle sound so natural. It's one of the most useful tools in music theory, especially for understanding why certain chords work together.
Is there an app version?
The tool works as a Progressive Web App — tap "Add to Home Screen" in your browser and it behaves like a native app, including offline support. A dedicated App Store version is coming.
Does it work for instruments other than guitar?
The circle of fifths and diatonic chord theory applies to any instrument. The capo suggestions and pentatonic neck view are guitar-specific, but everything else — chords, progressions, key relationships — works for piano, ukulele, bass, or any other instrument.
Ready to Play in Any Key?
No download required. Open it in your browser, add it to your home screen, and you're done.
Open the Circle of Fifths Tool →