Frequency Calculator
Convert musical notes to frequencies and vice versa. Useful for EQ, synthesis, and audio analysis.
Note to Frequency
A4
440.00 Hz
Frequency Reference Table
| Note | Oct 2 | Oct 3 | Oct 4 | Oct 5 | Oct 6 |
|---|---|---|---|---|---|
| C | 65.4 | 130.8 | 261.6 | 523.3 | 1046.5 |
| C# | 69.3 | 138.6 | 277.2 | 554.4 | 1108.7 |
| D | 73.4 | 146.8 | 293.7 | 587.3 | 1174.7 |
| D# | 77.8 | 155.6 | 311.1 | 622.3 | 1244.5 |
| E | 82.4 | 164.8 | 329.6 | 659.3 | 1318.5 |
| F | 87.3 | 174.6 | 349.2 | 698.5 | 1396.9 |
| F# | 92.5 | 185.0 | 370.0 | 740.0 | 1480.0 |
| G | 98.0 | 196.0 | 392.0 | 784.0 | 1568.0 |
| G# | 103.8 | 207.7 | 415.3 | 830.6 | 1661.2 |
| A | 110.0 | 220.0 | 440.0 | 880.0 | 1760.0 |
| A# | 116.5 | 233.1 | 466.2 | 932.3 | 1864.7 |
| B | 123.5 | 246.9 | 493.9 | 987.8 | 1975.5 |