5587.65Hz
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5.588 kHzFrequency at A4 = 440 Hz
113MIDI note number
–Piano key (of 88)
6.1 cmWavelength in air
About F8
F8 has a frequency of 5.588 kHz in standard tuning, where A4 is fixed at 440 Hz. It is MIDI note 113, outside the range of a standard piano.
In equal temperament every semitone multiplies the frequency by the twelfth root of two (≈1.05946), so F8 is 44 semitones above A4: f = 440 × 2^((113 − 69) / 12) = 5,587.65 Hz. The number in the name is the octave in scientific pitch notation, which starts each octave on C.
F8 frequency in different tunings
| Tuning reference | F8 frequency |
|---|---|
| A4 = 440 Hz (ISO 16 standard) | 5.588 kHz |
| A4 = 442 Hz (many European orchestras) | 5.613 kHz |
| A4 = 443 Hz (Berlin, Vienna) | 5.626 kHz |
| A4 = 435 Hz (French diapason normal, 1859) | 5.524 kHz |
| A4 = 432 Hz (alternative tuning) | 5.486 kHz |
| A4 = 415 Hz (Baroque pitch) | 5.27 kHz |
| C4 = 256 Hz (scientific pitch) | 5.468 kHz |
Intervals from F8
| Interval | Note | Frequency | Ratio (just) |
|---|---|---|---|
| Minor second | F♯8 | 5.92 kHz | 16:15 |
| Major second | G8 | 6.272 kHz | 9:8 |
| Minor third | G♯8 | 6.645 kHz | 6:5 |
| Major third | A8 | 7.04 kHz | 5:4 |
| Perfect fourth | A♯8 | 7.459 kHz | 4:3 |
| Tritone | B8 | 7.902 kHz | 45:32 |
| Perfect fifth | C9 | 8.372 kHz | 3:2 |
| Minor sixth | C♯9 | 8.87 kHz | 8:5 |
| Major sixth | D9 | 9.397 kHz | 5:3 |
| Minor seventh | D♯9 | 9.956 kHz | 9:5 |
| Major seventh | E9 | 10.548 kHz | 15:8 |
| Octave | F9 | 11.175 kHz | 2:1 |
Frequently asked questions
What is the frequency of F8?
F8 is 5.588 kHz when A4 = 440 Hz (5.486 kHz if A4 = 432 Hz).
What MIDI number is F8?
F8 is MIDI note number 113.
Is F8 on a piano?
No – a standard 88-key piano runs from A0 to C8, so F8 is outside its range.