Chord Finder
Build chords from any root note, see their notes and intervals, preview them on piano and guitar, and transpose common progressions in seconds.
Chord Notes
C • E • G
Intervals
Root • Major 3rd • Perfect 5th
Scale Degrees
1 • 3 • 5
Piano Keyboard
Two octaves with chord tones highlighted.
Guitar Chord Diagram
A simple 6-string, 5-fret voicing for quick reference.
Chord Progressions & Transpose Tool
Browse common progressions and shift them into any key.
Roman Numerals
I → IV → V → I
Transposed in C Major
C → F → G → C
How to Use
- Pick a root note such as C, F#, or A#.
- Choose a chord type like major, minor, 7th, diminished, or sus4.
- Review the chord notes, interval names, and scale degrees instantly.
- Use the piano and guitar sections to visualize the chord shape.
- Select a common progression and transpose it up or down by semitones.
Frequently Asked Questions
What does a chord finder do?
A chord finder shows you which notes make up a chord based on a chosen root and chord quality. It helps musicians learn music theory, write songs, and quickly identify shapes for piano and guitar.
What is the difference between a major and minor chord?
The main difference is the third. A major chord uses a major third above the root, which sounds brighter, while a minor chord uses a minor third, which sounds darker or more emotional.
How do chord progressions work?
Chord progressions are sequences of chords built from a key. Patterns like I-IV-V-I or I-V-vi-IV are common because they create familiar tension and resolution that sounds pleasing in many songs.
Can I use this for both piano and guitar?
Yes. This tool highlights chord tones on a simple piano keyboard and also shows a basic guitar fretboard diagram so you can understand the same chord across both instruments.