Note Frequency Chart: Hz for Every Note in the Singing Range
A note frequency chart in Hz for every note from C2 to C6, how A4 = 440 Hz sets the scale, and how to read the Hz value a pitch monitor shows while you sing.
Every musical note has a frequency, measured in hertz (Hz). A pitch monitor shows this number next to the note name. Knowing a few landmarks helps you read it at a glance.
Modern tuning uses A4 = 440 Hz as the reference. Every other note is calculated from it.
The rules behind the numbers
- Going up one octave doubles the frequency: A3 = 220 Hz, A4 = 440 Hz, A5 = 880 Hz.
- Each of the 12 semitones in an octave multiplies the frequency by about 1.0595.
- A cent is one hundredth of a semitone. Most listeners notice errors of around 10–25 cents.
Frequency chart for the C notes and A notes
| Note | Frequency | Where it sits |
|---|---|---|
| C2 | 65.41 Hz | Very low bass |
| A2 | 110.00 Hz | Low baritone |
| C3 | 130.81 Hz | Low tenor |
| A3 | 220.00 Hz | Low alto |
| C4 | 261.63 Hz | Middle C |
| A4 | 440.00 Hz | Tuning A |
| C5 | 523.25 Hz | Tenor high C |
| A5 | 880.00 Hz | High soprano |
| C6 | 1,046.50 Hz | Soprano high C |
Middle octave, every note
| Note | Hz | Note | Hz |
|---|---|---|---|
| C4 | 261.63 | F#4 | 369.99 |
| C#4 | 277.18 | G4 | 392.00 |
| D4 | 293.66 | G#4 | 415.30 |
| D#4 | 311.13 | A4 | 440.00 |
| E4 | 329.63 | A#4 | 466.16 |
| F4 | 349.23 | B4 | 493.88 |
To get any note in another octave, halve (down) or double (up) the value.
Vocal Pitch Monitor Tuner shows the Hz value and note name side by side as you sing, so this chart comes to life in real time.