What Is a Piano Chord?

If you are just starting out on the online piano, chords are the fastest way to make real music. A chord is simply three or more notes played at the same time. When you press several keys together and they sound pleasing, you are playing a chord. Most of the songs you know are built almost entirely from a small handful of them, which is great news for beginners: learn six or seven chords and you can already play hundreds of songs.

Before we build any chords, it helps to know the layout of the keyboard. If you are still learning where each note sits, take a moment with our guide to the piano keys so that note names like C, E, and G feel familiar.

How Chords Are Built From Scales

Almost every beginner chord is a triad: three notes stacked in a specific pattern. To build a basic triad you take three notes from a scale: the root (the note the chord is named after), the third, and the fifth.

The simplest way to understand this is by counting up a scale. In the C major scale (C, D, E, F, G, A, B), start on the root C. Skip a note to reach the third (E), then skip another to reach the fifth (G). Those three notes, C-E-G, form a C major chord. The same skipping pattern, one-three-five, works starting from any note in the scale.

Counting in Semitones

A semitone (or half step) is the distance from one key to the very next key, black or white. For a major triad, the third sits 4 semitones above the root, and the fifth sits 7 semitones above the root. Memorize that 4-and-7 pattern and you can build a major chord starting on any key.

Major vs Minor Triads

Major and minor triads are the two most common chord qualities, and the difference between them is remarkably small. Both use the root and the fifth in exactly the same place. Only the middle note, the third, moves.

• Major triad: root, third 4 semitones up, fifth 7 semitones up. Major chords sound bright and happy.
• Minor triad: root, third 3 semitones up, fifth 7 semitones up. Minor chords sound darker or sadder.

Notice that the only change is the third: lower it by a single semitone and a major chord becomes minor. For example, C major is C-E-G. Move that E down one semitone to E-flat and you get C minor (C-E-flat-G). That one-semitone shift is the single most important idea in beginner chord theory.

The Most Important Beginner Chords

These six chords appear constantly in pop, rock, folk, and worship music. Every note below is a natural (white) key, which makes them ideal for beginners.

• C major = C-E-G
• G major = G-B-D
• F major = F-A-C
• A minor = A-C-E
• D minor = D-F-A
• E minor = E-G-B

Practice each one with your right hand, using your thumb, middle finger, and little finger (fingers 1, 3, and 5). For a full reference with diagrams of these and many more shapes, see our piano chords reference.

Common Chord Progressions

A chord progression is a sequence of chords played in order. Musicians number the chords of a key with Roman numerals based on their position in the scale. In the key of C major, the numbering is: I = C, ii = D minor, iii = E minor, IV = F, V = G, vi = A minor.

The I-IV-V Progression

The I-IV-V progression is the backbone of blues, rock, and countless folk songs. In C major that is C - F - G. Play four beats on each chord, loop it around, and you already sound like a real song.

The I-V-vi-IV Progression

Often called the "four-chord song" progression, I-V-vi-IV powers a huge number of modern pop hits. In C major it is C - G - A minor - F. The move from the bright major chords into the vi (A minor) and back gives the progression its emotional pull.

Once these feel comfortable, put them to use on real music with our collection of songs arranged for beginners.

Inversions: The Same Chord, Rearranged

So far every chord has been in root position, meaning the root is the lowest note. An inversion keeps the same three notes but changes which one sits at the bottom. Take C major (C-E-G): move the C up an octave and you get E-G-C, called first inversion. Move the E up as well and you get G-C-E, second inversion. Inversions let your hand travel less between chords, which makes progressions smoother.

Seventh Chords: Adding One More Note

Once triads feel natural, you can add a fourth note to create richer seventh chords. A dominant seventh, such as G7 (G-B-D-F), is especially common because it creates tension that pulls strongly toward the home chord, in this case back to C. Seventh chords add color and are worth exploring after your basic triads are solid.

Practical Tips for Switching Chords Smoothly

The hardest part for beginners is not pressing a single chord, it is moving cleanly from one chord to the next.

• Practice slowly. Play a change perfectly slow before you try it fast.
• Look ahead. As you hold one chord, let your hand already prepare for the next shape.
• Find common notes. C major and A minor both contain C and E, so only one finger really needs to move.
• Use inversions. Choose the inversion that is closest to your current hand position.
• Keep a steady beat. It is better to change chords in time than to stop and hunt for perfect notes.
• Practice just two chords. Loop back and forth between a single pair until the change is automatic.

Start Playing Today

You now have everything you need to begin: what a chord is, how triads are built, the one-semitone secret behind major and minor, six essential beginner chords, and the progressions that turn them into songs. Open the online piano and play through the C-E-G shape right now. When you are ready to go deeper, explore the full piano chords reference and keep building your skills with our learn piano lessons.

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