1396.91Hz
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1.397 kHzFrequency at A4 = 440 Hz
89MIDI note number
69Piano key (of 88)
24.6 cmWavelength in air
About F6
F6 has a frequency of 1.397 kHz in standard tuning, where A4 is fixed at 440 Hz. It is MIDI note 89 and key number 69 on an 88-key piano.
In equal temperament every semitone multiplies the frequency by the twelfth root of two (≈1.05946), so F6 is 20 semitones above A4: f = 440 × 2^((89 − 69) / 12) = 1,396.91 Hz. The number in the name is the octave in scientific pitch notation, which starts each octave on C.
F6 frequency in different tunings
| Tuning reference | F6 frequency |
|---|---|
| A4 = 440 Hz (ISO 16 standard) | 1.397 kHz |
| A4 = 442 Hz (many European orchestras) | 1.403 kHz |
| A4 = 443 Hz (Berlin, Vienna) | 1.406 kHz |
| A4 = 435 Hz (French diapason normal, 1859) | 1.381 kHz |
| A4 = 432 Hz (alternative tuning) | 1.372 kHz |
| A4 = 415 Hz (Baroque pitch) | 1.318 kHz |
| C4 = 256 Hz (scientific pitch) | 1.367 kHz |
Intervals from F6
| Interval | Note | Frequency | Ratio (just) |
|---|---|---|---|
| Minor second | F♯6 | 1.48 kHz | 16:15 |
| Major second | G6 | 1.568 kHz | 9:8 |
| Minor third | G♯6 | 1.661 kHz | 6:5 |
| Major third | A6 | 1.76 kHz | 5:4 |
| Perfect fourth | A♯6 | 1.865 kHz | 4:3 |
| Tritone | B6 | 1.976 kHz | 45:32 |
| Perfect fifth | C7 | 2.093 kHz | 3:2 |
| Minor sixth | C♯7 | 2.217 kHz | 8:5 |
| Major sixth | D7 | 2.349 kHz | 5:3 |
| Minor seventh | D♯7 | 2.489 kHz | 9:5 |
| Major seventh | E7 | 2.637 kHz | 15:8 |
| Octave | F7 | 2.794 kHz | 2:1 |
Instruments and voices that can play F6
Frequently asked questions
What is the frequency of F6?
F6 is 1.397 kHz when A4 = 440 Hz (1.372 kHz if A4 = 432 Hz).
What MIDI number is F6?
F6 is MIDI note number 89.
Is F6 on a piano?
Yes – it is key 69 of 88.