How does the tool determine which keys to highlight?

Each chord type is defined by a set of semitone intervals from the root. For example, a major chord uses 0, 4, and 7 semitones. The tool adds each interval to the root note index to find the chord tones, then highlights those notes on the keyboard.

What is the difference between a dominant 7th and a major 7th chord?

A dominant 7th chord (e.g. G7) adds a minor 7th interval (10 semitones above the root), creating tension. A major 7th chord (e.g. Gmaj7) adds a major 7th interval (11 semitones), producing a smoother, jazzier sound.

What is a suspended chord?

A suspended chord replaces the third with either the second (sus2) or fourth (sus4). Sus2 uses intervals 0, 2, 7 and sus4 uses 0, 5, 7. These chords have an open, unresolved sound.

Can I see chords with flats instead of sharps?

The tool displays enharmonic equivalents (e.g. C# = Db, F# = Gb) below the keyboard so you can identify flat-named notes. The underlying pitches are identical regardless of spelling.

Does this cover all 12 keys?

Yes. All 12 chromatic root notes are supported, and you can combine any root with any of the 9 chord types for 108 distinct chord voicings.

Piano Chord Finder

Name: Piano Chord Finder
Availability: InStock
Author: Nham Vu

Pick a root note and chord type to see the exact keys to press on an interactive piano keyboard diagram.

Select a Chord

Root Note

Chord Type

Chord Tones

C Major

Chord tone (white key) Chord tone (black key)

Interval Breakdown

Degree	Interval Name	Semitones	Note

Copied!

Summary

Pick a root note and chord type to see the exact keys to press on an interactive piano keyboard diagram.

How it works

Select a root note (C through B, including sharps) using the note grid.
Choose a chord type: major, minor, dominant 7th, major 7th, minor 7th, sus2, sus4, diminished, or augmented.
The tool calculates the correct semitone intervals for the selected chord formula.
Chord tones are highlighted in blue on an interactive two-octave piano keyboard diagram.
The interval breakdown table shows each chord tone, its degree name, and semitone distance.
Copy the note names to use in your practice, sheet music, or DAW.

Use cases

Quickly find which piano keys to press for any chord symbol.
Learn how chords are built from intervals while seeing them on the keyboard.
Practice sight-reading chord shapes across all 12 keys.
Identify chord tones when transcribing a song by ear.
Teach beginner piano students the visual layout of common chords.
Explore how chord types differ (e.g. major vs. minor vs. diminished).
Compose or arrange music by referencing chord voicings on the fly.
Transpose a chord to a new root and instantly see the new keyboard positions.

Frequently Asked Questions

Last updated: 2026-07-01 · Reviewed by Nham Vu