Hertz to semitones from A4
Type a value in Hz to get it in semitones instantly.
0semitones
That's about the same as concert A. That is about 0 semitones from concert A.
Convert the other way: semitones 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 semitones
Pitch is logarithmic: f = 440 × 2^((note − 69) ÷ 12). Every octave doubles the frequency and holds 12 semitones.
Example: 440 Hz = 0 semitones.
Every unit
Your pitch in every unit
Tables
Hz to semitones conversion table
| Hz | semitones |
|---|---|
| 55 Hz | -36 semitones |
| 110 Hz | -24 semitones |
| 220 Hz | -12 semitones |
| 261.63 Hz | -8.99971 semitones |
| 330 Hz | -4.98045 semitones |
| 440 Hz | 0 semitones |
| 523.25 Hz | 2.99996 semitones |
| 660 Hz | 7.01955 semitones |
| 880 Hz | 12 semitones |
| 1,760 Hz | 24 semitones |
semitones to Hz conversion table
| semitones | Hz |
|---|---|
| 55 semitones | 10,548.1 Hz |
| 110 semitones | 252,868 Hz |
| 220 semitones | 145,324,000 Hz |
| 261.63 semitones | 1.609×10⁹ Hz |
| 330 semitones | 8.352×10¹⁰ Hz |
| 440 semitones | 4.8×10¹³ Hz |
| 523.25 semitones | 5.883×10¹⁵ Hz |
| 660 semitones | 1.585×10¹⁹ Hz |
| 880 semitones | 5.236×10²⁴ Hz |
| 1,760 semitones | 6.23×10⁴⁶ Hz |
Quick answers
Quick answers
- How many semitones is 1 Hz?
- 1 Hz is -105.376 semitones.
- How many semitones is 10 Hz?
- 10 Hz is -65.5132 semitones.
- How many semitones is 440 Hz?
- 440 Hz is 0 semitones.
The units
About these units
Hertz (Hz)
Cycles per second, the physical frequency of the note.
Semitones from A4 (semitones)
How many half-steps above or below concert A the note sits.
Keep going