Ocean Eyes — Quick Answer & Harmonic Definition

Ocean Eyes uses the chords C, G, Am, F in the key of C. The progression follows a I–V–vi–IV pattern. This is a beginner-level song.

Pop · 2016 · Beginner

Ocean Eyes

by Billie Eilish
Key of C 120 BPM Beginner

Chord Sheet

Key of C · Progression: I–V–vi–IV

C
chord 1
G
chord 2
Am
chord 3
F
chord 4
Chord Loop
C — G — Am — F — ...
Roman Numeral Analysis
View the harmonic structure and functional analysis of this progression.
View Analysis →
Key
C
Tempo
120 BPM
Chords
4
Genre
Pop

Practice Tips for Ocean Eyes

  • →Start at 60 BPM (50% tempo) until chord changes feel smooth.
  • →Loop just the C→G transition repeatedly — this is often the hardest change.
  • →Use our Metronome set to 120 BPM for precise timing practice.
  • →Click any chord above to see its full piano keyboard and guitar fingering diagram.

How to Play Ocean Eyes by Billie Eilish

Ocean Eyes (2016) is a beginner-level pop song that uses 4 chords: C, G, Am, F in the key of C. The chord progression is I–V–vi–IV.

Chord Breakdown

  • C — major chord, bright and stable
  • G — major chord, bright and stable
  • Am — minor chord, darker emotional sound
  • F — major chord, bright and stable

About Ocean Eyes

"Ocean Eyes" by Billie Eilish (released 2016) is one of the most recognizable pop songs ever recorded. Its 4-chord structure demonstrates how a simple progression can create an emotionally powerful and memorable piece of music. The combination of C, G, Am creates a harmonic loop that feels both complete and constantly forward-moving.

Learning Ocean Eyes as a Beginner

If you're learning to play Ocean Eyes, start by getting comfortable with each chord individually before trying to switch between them. The goal is to make each chord change automatic — your fingers should know where to go without you having to think about it. Practice the chord loop slowly with a metronome, and you'll be playing the full song within a few weeks.

Similar Songs (Same Key or Chords)

Let It Be
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Hotel California
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Bm – F# – A – E – G – D – Em
Advanced
Bm · 74 BPM
Metronome
Practice at 120 BPM
Tuner
Tune your instrument
Piano
Play on virtual piano
Guitar
Play on fretboard

Knowledge Base & FAQs

Ocean Eyes by Billie Eilish — FAQ

Everything you need to know about our browser-based Web Audio engine, instruments, and music theory workspace.

What chords are in Ocean Eyes by Billie Eilish?

Ocean Eyes uses the chords C, G, Am, F in the key of C.

The progression follows a I–V–vi–IV pattern. This is a beginner-level song.

What key is Ocean Eyes in?

Ocean Eyes by Billie Eilish is in the key of C.

The primary chords are C, G, Am.

What is the tempo of Ocean Eyes?

Ocean Eyes is played at approximately 120 BPM.

This is a faster tempo — practice slowly first before bringing it to full speed. Use our free metronome to practice at exactly 120 BPM.

What strumming pattern does Ocean Eyes use?

Ocean Eyes is typically in 4/4 time.

A common strumming pattern is down-down-up-up-down-up (DDUUDU) or simplified all-down for beginners. Focus on getting chord changes smooth before adding strumming complexity.

How do I play C chord on guitar?

C is the main chord in Ocean Eyes.

For C major: 3rd fret 5th string (A), 2nd fret 4th string (D), 1st fret 2nd string (B). Don't play 6th string.

Can I play Ocean Eyes on piano?

Yes! Ocean Eyes sounds great on piano.

Play the chords C, G, Am, F in root position or inversions. Left hand plays bass notes (root of each chord), right hand plays chord voicings. This is a beginner-level arrangement.

Is Ocean Eyes beginner-friendly?

Yes! Ocean Eyes is rated Beginner difficulty.

It uses 4 main chords (C, G, Am), all easy open or basic chords. One of the best songs for new players to learn.

What is the chord progression in Ocean Eyes?

The main progression in Ocean Eyes is C – G – Am – F (Roman numeral: I–V–vi–IV).

This 4-chord pattern repeats throughout most of the song.

Can I transpose Ocean Eyes to a different key?

Yes! Ocean Eyes is in C.

To make it easier, try transposing to G or D using a capo. A capo changes your effective key while keeping the same chord shapes. Use our Transpose Tool to convert all chord names automatically.

What genre is Ocean Eyes?

Ocean Eyes by Billie Eilish is a Pop song from 2016.

Its 4-chord progression (C, G, Am, F) translates naturally to different tempos and styles, making it a popular cover choice for musicians of all levels.