F♯5 / G♭5
739.989Hz at concert pitch
Press to hear a pure sine tone at this pitch.
MIDI note
78
Piano key
58
Octave
5
Frequency
739.989 Hz
Period
1.3514 ms
Wavelength
0.4635 m
Pitch class
F♯
Notation
SPN
MIDI is the note number synths and software pass around (0–127). Pitch class is the note without its octave — all the F♯s share one. Enharmonic spellings (F♯5 and G♭5) name the same pitch two ways.
At other reference pitches
| Reference (A4) | F♯5 frequency | Where you meet it |
|---|---|---|
| 432 Hz | 726.535 Hz | the alternative-tuning circle |
| 440 Hzstandard | 739.989 Hz | the ISO 16 standard — concert pitch |
| 442 Hz | 743.352 Hz | many European orchestras tune a touch sharp |
| 443 Hz | 745.034 Hz | some sharper continental orchestras |
Every row is F♯5 — only the A4 you tune to changes. A frequency scales straight with the reference: F♯5 at 432 Hz is the 440 Hz value times 432⁄440.
Move around
Every F♯
Chords with F♯ in them
F♯ appears in each of these — see the whole chord grid.