Hertz to MIDI note numbers
Type a value in Hz to get it in MIDI instantly.
69MIDI
That's about the same as concert A. That is about 0 semitones from concert A.
Convert the other way: MIDI to Hz
What it means
What does that sound like?
Based on equal temperament with A4 at 440 Hz. Orchestras sometimes tune to 442 or 443, shifting everything slightly.
The math
How to convert Hz to MIDI
Pitch is logarithmic: f = 440 × 2^((note − 69) ÷ 12). Every octave doubles the frequency and holds 12 semitones.
Example: 440 Hz = 69 MIDI.
Every unit
Your pitch in every unit
Tables
Hz to MIDI conversion table
| Hz | MIDI |
|---|---|
| 55 Hz | 33 MIDI |
| 110 Hz | 45 MIDI |
| 220 Hz | 57 MIDI |
| 261.63 Hz | 60.0003 MIDI |
| 330 Hz | 64.0196 MIDI |
| 440 Hz | 69 MIDI |
| 523.25 Hz | 72 MIDI |
| 660 Hz | 76.0196 MIDI |
| 880 Hz | 81 MIDI |
| 1,760 Hz | 93 MIDI |
MIDI to Hz conversion table
| MIDI | Hz |
|---|---|
| 55 MIDI | 195.998 Hz |
| 110 MIDI | 4,698.64 Hz |
| 220 MIDI | 2,700,310 Hz |
| 261.63 MIDI | 29,904,500 Hz |
| 330 MIDI | 1.552×10⁹ Hz |
| 440 MIDI | 8.919×10¹¹ Hz |
| 523.25 MIDI | 1.093×10¹⁴ Hz |
| 660 MIDI | 2.946×10¹⁷ Hz |
| 880 MIDI | 9.729×10²² Hz |
| 1,760 MIDI | 1.158×10⁴⁵ Hz |
Quick answers
Quick answers
- How many MIDI is 1 Hz?
- 1 Hz is -36.3763 MIDI.
- How many MIDI is 10 Hz?
- 10 Hz is 3.48682 MIDI.
- How many MIDI is 440 Hz?
- 440 Hz is 69 MIDI.
The units
About these units
Hertz (Hz)
Cycles per second, the physical frequency of the note.
MIDI note numbers (MIDI)
0 to 127, with 69 as A440 and 60 as middle C. Every synthesiser speaks this.
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