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Treble clef lines and spaces

The treble clef curls around the second line from the bottom, and that line is G above middle C.

Five lines, four spaces

Written music places pitch on a staff: five evenly spaced horizontal lines with four spaces between them. We always count from the bottom, so the lowest line is the first line and the top line is the fifth. A note can sit on a line, with the line running through its middle, or in a space, touching the lines above and below. Higher on the page means higher in sound, and time runs from left to right, like a line of text.

The lines and spaces have no names until a clef appears at the start of the staff. The treble clef is used for higher voices and instruments: soprano singers, flute, violin, trumpet, and the right hand of most piano music. Its lower curl wraps around the second line from the bottom and fixes that line as G4, the G just above middle C. That is why it is also called the G clef.

𝄞EGBDF
The five lines of the treble staff, bottom to top: E G B D F.

The line notes and the space notes

Reading upward, the lines are E G B D F and the spaces are F A C E. Because each step on the staff moves to the next letter, lines and spaces simply take turns: E on the first line, F in the first space, G on the second line, A in the second space, and so on up to F on the top line. The letters run A B C D E F G and then start again at A.

𝄞FACE
The four spaces spell FACE from the bottom up.

Mnemonics are memory aids

Teachers often hand out a sentence for the lines, such as "Every Good Boy Does Fine", or the version used in Open Music Theory, "Every Good Bird Does Fly". The spaces spell the word FACE. These sentences are mnemonics: memory aids that help you get started. They are not rules of music, and they become slow if you recite the whole sentence every time you meet a note on the fourth line.

A faster habit is to learn a few landmark notes by sight and read the rest as steps from them. The G line is marked by the clef itself. The middle line is B, the top line is F, and the space just below the top line is E. From any landmark, a note one position higher is the next letter, and a note one position lower is the previous letter. After a few weeks of practice, most players stop thinking of the sentence at all.

BackgroundThe treble clef began life as a letter. In medieval chant books, scribes wrote a letter such as G, F or C at the start of a line to show which pitch that line stood for. These "key letters" were copied by hand for centuries, and the shapes gradually became decorated and stylised until the G turned into the curling sign we draw today. If you look closely, you can still see a G hidden in the loop around the second line.

Treble lines from the bottom: E G B D F. Treble spaces from the bottom: F A C E. The clef curls around the G line.

Treble clef, 1st lineE4
Treble clef, 2nd lineG4 (the clef curls around it)
Treble clef, middle lineB4
Treble clef, top lineF5
Treble clef, 3rd spaceC5
Treble clef, 1st spaceF4
  1. How many lines does a staff have?
  2. Which line does the treble clef curl around?
    • The 1st line
    • The 2nd line
    • The middle line
    • The top line
  3. What is this note?
    • A
    • B
    • C
    • D
  4. What is this note?
    • F
    • G
    • A
    • B
  5. What is this note?
    • D
    • E
    • F
    • G
  6. What is this note?
    • C
    • D
    • E
    • F
  7. Which word do the treble spaces spell from the bottom?
  8. A note moves from the 2nd line up to the 2nd space. What happens to its letter?
    • It becomes the next letter, G to A
    • It skips a letter, G to B
    • It stays G
    • It goes back to F
  9. Is "Every Good Boy Does Fine" a rule of music?
    • No, it is only a memory aid for E G B D F
    • Yes, it defines the treble clef
    • Yes, it names the spaces
    • It is the rule for bass clef
  10. Which instrument usually reads treble clef?
    • Flute
    • Tuba
    • Double bass
    • Bassoon
Key points
  • A staff has 5 lines and 4 spaces, counted from the bottom.
  • Treble clef: lines E G B D F, spaces F A C E.
  • The clef curls around G4, the 2nd line.
  • Mnemonics are memory aids; landmarks (G, B, F) make reading faster.
Sources for this course (13)
  • Open Music Theory (Viva Pressbooks)
  • chapters "Notation of Notes, Clefs, and Ledger Lines" (viva.pressbooks.pub/openmusictheory/chapter/notation-of-notes-clefs-and-ledger-lines/)
  • "Reading Clefs" (viva.pressbooks.pub/openmusictheory/chapter/clefs/)
  • "The Keyboard and the Grand Staff" (viva.pressbooks.pub/openmusictheory/chapter/the-keyboard-and-grand-staff/)
  • "Half and Whole Steps" (viva.pressbooks.pub/openmusictheory/chapter/half-and-whole-steps/)
  • Wikipedia "Clef" (en.wikipedia.org/wiki/Clef)
  • "Ledger line" (en.wikipedia.org/wiki/Ledger_line)
  • "Accidental (music)" (en.wikipedia.org/wiki/Accidental_(music))
  • "Musical note" pitch names and German H (en.wikipedia.org/wiki/Musical_note)
  • "Guido of Arezzo" and "Ut queant laxis" (en.wikipedia.org/wiki/Guido_of_Arezzo)
  • 나무위키 「음이름」 가나다식 음이름 다라마바사가나 (namu.wiki/w/음이름)
  • Melodies used are public domain (Ode to Joy, Beethoven 1824; Frere Jacques and Mary Had a Little Lamb, traditional)
  • Middle C = C4 about 261.63 Hz from f = 440 x 2^((m - 69) / 12).

Checked: 2026-10-17