Interactive circle of fifths
Explore the circle of fifths: tap a key to see its key signature (how many sharps or flats and which ones), the notes of the scale, the relative minor, the neighboring keys and the main chords.
Circle of fifths and key signatures
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Interactive circle of fifths: what it is for
The circle of fifths shows the 12 major keys and their relative minors, arranged in fifths. Tap a key to see its key signature, with how many and which sharps or flats, the scale, the relative minor, enharmonic equivalents, the neighboring keys (subdominant and dominant) and the seven diatonic chords, which you can listen to.
The sound is generated in your browser with the Web Audio API: nothing is recorded or sent to a server.
How to use
- Tap a key on the circle.
- See the key signature, the scale and the relative minor.
- Tap the chords to hear them.
When to use it
- Learning key signatures to read sheet music.
- Planning modulations and key changes.
- Studying harmony and songwriting.
Frequently asked questions
What is the circle of fifths?
It is a diagram with the 12 major keys arranged in fifths: C, G, D, A, E, B, F sharp and, going the other way, F, B flat, E flat and so on. Each step clockwise adds a sharp to the key signature, and each step counterclockwise adds a flat.
What is the order of sharps and flats?
Sharps come in the order F, C, G, D, A, E, B. Flats come in the reverse order: B, E, A, D, G, C, F.
What are neighboring and relative keys?
The relative minor has the same key signature as the major key and starts on the 6th degree (A minor is the relative of C major). The neighbors are the keys next to it on the circle, which differ by just one note and are therefore the most common in modulations.
Is it really free?
Yes, 100% free. No sign-up, no subscription and no usage limits. All Tools123 tools are free and run right in your browser.