F (musical note)

F is a musical note, the fourth above C. It is also known as fa in fixed-do solfège.

When calculated in equal temperament with a reference of A above middle C as 440 Hz, the frequency of Middle F (F4) is approximately 349.228 Hz. See pitch (music) for a discussion of historical variations in frequency.

E sharp

In certain circumstances, this note may be called E♯. E♯ is commonly found before F♯ in the same measure in pieces where F♯ is in the key signature to save space; writing an F♮ will make the following F♯ need a sharp sign.

Designation by octave

Scientific designation	Helmholtz designation	Octave name	Frequency (Hz)
F-1	F͵͵͵	Subsubcontra	10.913
F0	F͵͵	Subcontra	21.827
F1	F͵	Contra	43.654
F2	F	Great	87.307
F3	f	Small	174.614
F4	f′	One-lined	349.228
F5	f′′	Two-lined	698.457
F6	f′′′	Three-lined	1396.913
F7	f′′′′	Four-lined	2793.826
F8	f′′′′′	Five-lined	5587.652
F9	f′′′′′′	Six-lined	11175.303

See also

• F major
• F minor