Note Frequency Guide: Hz for Every Musical Note
Complete reference for musical note frequencies from A0 to C8. Learn how Hz and pitch relate, how to tune 808s, flip samples in key, and use EQ frequencies musically.
Full Chromatic Note Frequency Chart (A0 - C8)
All 12 notes across octaves 0-8. A4 = 440 Hz standard tuning. Values in Hz, rounded to 2 decimal places.
| Note | Oct 0 | Oct 1 | Oct 2 | Oct 3 | Oct 4 | Oct 5 | Oct 6 | Oct 7 | Oct 8 |
|---|---|---|---|---|---|---|---|---|---|
| C | 16.35 | 32.70 | 65.41 | 130.8 | 261.6 | 523.3 | 1046.5 | 2093.0 | 4186.0 |
| C#/Db | 17.32 | 34.65 | 69.30 | 138.6 | 277.2 | 554.4 | 1108.7 | 2217.5 | 4434.9 |
| D | 18.35 | 36.71 | 73.42 | 146.8 | 293.7 | 587.3 | 1174.7 | 2349.3 | 4698.6 |
| D#/Eb | 19.45 | 38.89 | 77.78 | 155.6 | 311.1 | 622.3 | 1244.5 | 2489.0 | 4978.0 |
| E | 20.60 | 41.20 | 82.41 | 164.8 | 329.6 | 659.3 | 1318.5 | 2637.0 | 5274.0 |
| F | 21.83 | 43.65 | 87.31 | 174.6 | 349.2 | 698.5 | 1396.9 | 2793.8 | 5587.6 |
| F#/Gb | 23.12 | 46.25 | 92.50 | 185.0 | 370.0 | 740.0 | 1480.0 | 2960.0 | 5919.9 |
| G | 24.50 | 49.00 | 98.00 | 196.0 | 392.0 | 784.0 | 1568.0 | 3136.0 | 6271.9 |
| G#/Ab | 25.96 | 51.91 | 103.8 | 207.7 | 415.3 | 830.6 | 1661.2 | 3322.4 | 6644.9 |
| A | 27.50 | 55.00 | 110.0 | 220.0 | 440.0 | 880.0 | 1760.0 | 3520.0 | 7040.0 |
| A#/Bb | 29.14 | 58.27 | 116.5 | 233.1 | 466.2 | 932.3 | 1864.7 | 3729.3 | 7458.6 |
| B | 30.87 | 61.74 | 123.5 | 246.9 | 493.9 | 987.8 | 1975.5 | 3951.1 | 7902.1 |
How Note Frequency Works
Pitch and frequency are directly linked. The higher the Hz, the higher the pitch. In Western music's equal temperament system, the octave is divided into 12 equal semitones. Each semitone is a frequency ratio of 2^(1/12) = approximately 1.0595, meaning each semitone is about 5.95% higher than the one below it.
The formula to calculate any note's frequency is:
Hz = 440 x 2^((MIDI - 69) / 12)
Where A4 = MIDI 69 = 440 Hz. Each octave doubles the frequency: A3 = 220 Hz, A4 = 440 Hz, A5 = 880 Hz. Each octave up adds 12 MIDI numbers.
808 Tuning Frequency Reference
808s and sub-bass elements typically live in octaves 1 and 2 (40-130 Hz range). Here are the most common 808 tuning notes:
| Note | Oct 1 (Hz) | Oct 2 (Hz) |
|---|---|---|
| C | 32.70 | 65.41 |
| C#/Db | 34.65 | 69.30 |
| D | 36.71 | 73.42 |
| D#/Eb | 38.89 | 77.78 |
| E | 41.20 | 82.41 |
| F | 43.65 | 87.31 |
| F#/Gb | 46.25 | 92.50 |
| G | 49.00 | 98.00 |
| G#/Ab | 51.91 | 103.83 |
| A | 55.00 | 110.00 |
| A#/Bb | 58.27 | 116.54 |
| B | 61.74 | 123.47 |
Tip: Find your track's key with BeatKey, then tune your 808 to the root note in octave 1 or 2 from the table above.
Producer Use Cases
808 and Sub-Bass Tuning
Identify your track's key, look up the root note in octave 1-2, tune your 808 sample to that Hz. For F# minor, that's F#1 = 46.25 Hz or F#2 = 92.50 Hz.
Sample Flipping
Use Chord Finder to get the chords in a sample, then look up the root note Hz to pitch it perfectly into your track without key clash.
EQ Notching by Note
Instead of guessing, EQ at the exact Hz of the problematic note. If your mix has too much A2, EQ at 110 Hz. If you want to boost the kick fundamental, find the note and boost there.
Synthesizer Oscillator Setup
When layering synths, use frequency references to ensure oscillators are tuned in harmony. Stack synths at the same Hz for unison, or at octave intervals (double/halve Hz).
Frequently Asked Questions
What is the frequency of every A note?
A0 = 27.5 Hz, A1 = 55 Hz, A2 = 110 Hz, A3 = 220 Hz, A4 = 440 Hz (standard tuning reference), A5 = 880 Hz, A6 = 1760 Hz, A7 = 3520 Hz. Each octave doubles the frequency.
How do I find which Hz corresponds to a note?
Use the Note Frequency Calculator. Enter any note name (A4, C#3, Bb5) to get the exact Hz. Or use the formula: Hz = 440 x 2^((MIDI - 69) / 12).
What frequencies do 808s use?
808s typically live in the 40-120 Hz range (octaves 1-2). Common notes: C2 = 65.41 Hz, F#2 = 92.50 Hz, A2 = 110.00 Hz. Tune to your track's root note in octave 1 or 2.
Why does A4 = 440 Hz?
440 Hz was standardized as A4 by the ISO in 1955. Before standardization, orchestras used various tunings. 440 Hz was chosen as a practical compromise. Some musicians prefer 432 Hz, but 440 Hz is the universal modern standard.