F4 — 349.23 Hz
F4 (MIDI 65) vibrates 349.23 times per second at standard concert pitch. Play the reference tone below, or tune to it with the online tuner.
F4 at different reference pitches
| Reference (A4) | F4 frequency | Used for |
|---|---|---|
| 415 Hz | 329.39 Hz | Baroque pitch |
| 432 Hz | 342.88 Hz | “Verdi” pitch |
| 440 Hz | 349.23 Hz | Standard concert pitch |
| 442 Hz | 350.82 Hz | European orchestras |
| 444 Hz | 352.40 Hz | European orchestras |
Physical properties
- Period: one cycle every 2.86 ms
- Wavelength in air: ≈ 98.2 cm (at 20 °C, 343 m/s)
- MIDI note number: 65
- Octave up: F5 = 698.46 Hz · Octave down: 174.61 Hz