F♯0 at every common reference pitch
A note’s frequency depends on what A4 is tuned to. The standard is 440 Hz; the other three are the ones you are most likely to meet. The cents column is how far each one sits from the 440 version — the same for every note, because changing the reference moves the whole scale together.
| Reference | F♯0 | vs 440 |
|---|---|---|
| A4 = 415 Hz · Baroque pitch | 21.81 Hz | −101.3¢ |
| A4 = 432 Hz · “Verdi” pitch | 22.70 Hz | −31.8¢ |
| A4 = 440 Hz · Standard (ISO 16) | 23.12 Hz | — |
| A4 = 442 Hz · Orchestral | 23.23 Hz | +7.9¢ |
One cycle of F♯0 lasts 43.244 ms, and its wavelength in air at 20 °C is 14.83 m. Hold it as a steady tone in the tone generator.
F♯0 on the piano
F♯0 is below the bottom of an 88-key piano, whose lowest key is A0 — 3 semitones lower than that. Press any key below to compare it with its neighbours.
F♯0 on the guitar
F♯0 is below the guitar’s lowest note, the open low E (E2), so a guitar in standard tuning cannot play it.
F♯0 on the staff
Instruments that can play F♯0
None of the instruments in our range charts reach F♯0.
F♯0 is outside the typical range of all six voice types. Test your own range.
The harmonics of F♯0
A played F♯0 is not one frequency. A string or a pipe also sounds whole-number multiples of it, and the mix of those harmonics is the instrument’s tone. Here is where the first eight land — and why the 7th sounds out of tune against a piano.
| Harmonic | Frequency | Nearest note | Off by |
|---|---|---|---|
| 1 (fundamental) | 23.12 Hz | F♯0 | 0¢ |
| 2 | 46.25 Hz | F♯1 | 0¢ |
| 3 | 69.37 Hz | C♯2 | +2.0¢ |
| 4 | 92.50 Hz | F♯2 | 0¢ |
| 5 | 115.62 Hz | B♭2 | −13.7¢ |
| 6 | 138.75 Hz | C♯3 | +2.0¢ |
| 7 | 161.87 Hz | E3 | −31.2¢ |
| 8 | 185.00 Hz | F♯3 | 0¢ |
Frequently asked questions
What is the frequency of F♯0?
F♯0 is 23.12 Hz in equal temperament with A4 tuned to 440 Hz, the international standard. At A4 = 432 Hz it is 22.70 Hz, and at the orchestral A4 = 442 Hz it is 23.23 Hz.
Is F♯0 the same note as G♭0?
On a piano, a guitar or a tuner, yes: F♯0 and G♭0 are the same key and the same frequency, 23.12 Hz, in equal temperament. They are two names for one pitch (enharmonic equivalents). Which one is written depends on the key — sharps in sharp keys, flats in flat keys — and a string or wind player may pitch them a few cents apart when playing in just intonation.
How do I play F♯0 on a piano?
F♯0 is below the bottom of an 88-key piano, whose lowest key is A0 — 3 semitones lower than that.
Which instruments can play F♯0?
None of the instruments we chart reach F♯0; it is outside the range of ordinary instruments.
Typing it? F♯0 is also written F#0 or Gb0. Convert any frequency on the Hz-to-note converter.