F♯1 / G♭1
46.249Hz at concert pitch
Press to hear a pure sine tone at this pitch.
MIDI note
30
Piano key
10
Octave
1
Frequency
46.249 Hz
Period
21.6221 ms
Wavelength
7.4164 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♯1 and G♭1) name the same pitch two ways.
At other reference pitches
| Reference (A4) | F♯1 frequency | Where you meet it |
|---|---|---|
| 432 Hz | 45.408 Hz | the alternative-tuning circle |
| 440 Hzstandard | 46.249 Hz | the ISO 16 standard — concert pitch |
| 442 Hz | 46.46 Hz | many European orchestras tune a touch sharp |
| 443 Hz | 46.565 Hz | some sharper continental orchestras |
Every row is F♯1 — only the A4 you tune to changes. A frequency scales straight with the reference: F♯1 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.