Note name to hertz
Type a value in note 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 note
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 note to Hz
Pitch is logarithmic: f = 440 × 2^((note − 69) ÷ 12). Every octave doubles the frequency and holds 12 semitones.
Example: G♯35 note = 8.919×10¹¹ Hz.
Every unit
Your pitch in every unit
Tables
note to Hz conversion table
| note | Hz |
|---|---|
| G3 note | 195.998 Hz |
| D8 note | 4,698.64 Hz |
| E17 note | 2,700,310 Hz |
| A♯20 −37¢ note | 29,904,500 Hz |
| F♯26 note | 1.552×10⁹ Hz |
| G♯35 note | 8.919×10¹¹ Hz |
| G42 +25¢ note | 1.093×10¹⁴ Hz |
| C54 note | 2.946×10¹⁷ Hz |
| E72 note | 9.729×10²² Hz |
| G♯145 note | 1.158×10⁴⁵ Hz |
Hz to note conversion table
| Hz | note |
|---|---|
| 55 Hz | A1 note |
| 110 Hz | A2 note |
| 220 Hz | A3 note |
| 261.63 Hz | C4 note |
| 330 Hz | E4 +2¢ note |
| 440 Hz | A4 note |
| 523.25 Hz | C5 note |
| 660 Hz | E5 +2¢ note |
| 880 Hz | A5 note |
| 1,760 Hz | A6 note |
Quick answers
Quick answers
- How many Hz is C♯-1 note?
- C♯-1 note is 8.66196 Hz.
- How many Hz is A♯-1 note?
- A♯-1 note is 14.5676 Hz.
- How many Hz is G♯35 note?
- G♯35 note is 8.919×10¹¹ Hz.
The units
About these units
Note name (note)
The nearest note in scientific pitch notation (A4 = 440 Hz), with the offset in cents.
Hertz (Hz)
Cycles per second, the physical frequency of the note.
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