MIDI note numbers to hertz
Type a value in MIDI to get it in Hz instantly.
8.919×10¹¹Hz
That's 213,057,823× as high as the top of a piano — nothing on our list beats it. That is about 371 semitones from concert A.
Convert the other way: Hz to MIDI
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 MIDI to Hz
Pitch is logarithmic: f = 440 × 2^((note − 69) ÷ 12). Every octave doubles the frequency and holds 12 semitones.
Example: 440 MIDI = 8.919×10¹¹ Hz.
Every unit
Your pitch in every unit
Tables
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 |
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 |
Quick answers
Quick answers
- How many Hz is 1 MIDI?
- 1 MIDI is 8.66196 Hz.
- How many Hz is 10 MIDI?
- 10 MIDI is 14.5676 Hz.
- How many Hz is 440 MIDI?
- 440 MIDI is 8.919×10¹¹ Hz.
The units
About these units
MIDI note numbers (MIDI)
0 to 127, with 69 as A440 and 60 as middle C. Every synthesiser speaks this.
Hertz (Hz)
Cycles per second, the physical frequency of the note.
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