Note Frequency Calculator
Calculate the exact frequency of any musical note in Hz. Convert between notes and frequencies, adjust A4 tuning reference (440Hz, 432Hz, etc.), view wavelength and period, and explore the complete frequency table for all octaves.
Frequency Reference Table
| Note | Octave 0 | Octave 1 | Octave 2 | Octave 3 | Octave 4 | Octave 5 | Octave 6 | Octave 7 | Octave 8 |
|---|---|---|---|---|---|---|---|---|---|
| C | 16.35 | 32.70 | 65.41 | 130.81 | 261.63 | 523.25 | 1046.50 | 2093.00 | 4186.01 |
| C# | 17.32 | 34.65 | 69.30 | 138.59 | 277.18 | 554.37 | 1108.73 | 2217.46 | 4434.92 |
| D | 18.35 | 36.71 | 73.42 | 146.83 | 293.66 | 587.33 | 1174.66 | 2349.32 | 4698.64 |
| D# | 19.45 | 38.89 | 77.78 | 155.56 | 311.13 | 622.25 | 1244.51 | 2489.02 | 4978.03 |
| E | 20.60 | 41.20 | 82.41 | 164.81 | 329.63 | 659.26 | 1318.51 | 2637.02 | 5274.04 |
| F | 21.83 | 43.65 | 87.31 | 174.61 | 349.23 | 698.46 | 1396.91 | 2793.83 | 5587.65 |
| F# | 23.12 | 46.25 | 92.50 | 185.00 | 369.99 | 739.99 | 1479.98 | 2959.96 | 5919.91 |
| G | 24.50 | 49.00 | 98.00 | 196.00 | 392.00 | 783.99 | 1567.98 | 3135.96 | 6271.93 |
| G# | 25.96 | 51.91 | 103.83 | 207.65 | 415.30 | 830.61 | 1661.22 | 3322.44 | 6644.88 |
| A | 27.50 | 55.00 | 110.00 | 220.00 | 440.00 | 880.00 | 1760.00 | 3520.00 | 7040.00 |
| A# | 29.14 | 58.27 | 116.54 | 233.08 | 466.16 | 932.33 | 1864.66 | 3729.31 | 7458.62 |
| B | 30.87 | 61.74 | 123.47 | 246.94 | 493.88 | 987.77 | 1975.53 | 3951.07 | 7902.13 |
How to Use the Note Frequency Calculator
Follow these simple steps to calculate note frequencies and explore the relationship between musical pitches and their Hz values.
Select a Note
Click on any note from C to B on the note selector. Toggle between sharp (#) and flat (♭) notation as needed.
Tips: The piano-style layout makes it easy to visualize the chromatic scale.
Choose an Octave
Select an octave from 0 to 8. Middle C (C4) is a common reference point, and A4 is the standard tuning reference.
Tips: Octave 4 contains the standard tuning reference A4 = 440 Hz.
Adjust A4 Reference
Customize the A4 reference frequency. Common standards include 440 Hz (modern), 432 Hz (alternative), and 442 Hz (orchestral).
Tips: Changing A4 affects all calculated frequencies proportionally.
View Results & Play
See the calculated frequency, wavelength, period, and MIDI note number. Click Play to hear the tone.
Tips: Use the frequency table below to compare all notes across octaves.
Why Use Our Note Frequency Calculator
A comprehensive tool for musicians, producers, and audio engineers to work with precise note frequencies.
Precise Calculations
Get exact frequency values for any note in any octave using the equal temperament formula with adjustable A4 reference.
Adjustable Tuning Standard
Switch between 440 Hz (modern standard), 432 Hz (alternative tuning), 442 Hz (orchestral), or any custom reference.
Complete Frequency Table
View frequencies for all 12 notes across 9 octaves. Click any cell to select that note instantly.
Audio Playback
Hear the selected note as a pure sine wave tone. Perfect for tuning instruments or ear training.
Physical Properties
View wavelength in meters/centimeters and period in milliseconds/microseconds for each frequency.
MIDI Integration
See the corresponding MIDI note number for easy integration with DAWs and MIDI hardware.
Frequently Asked Questions
Common questions about note frequencies, tuning standards, and using the calculator.
Who Uses the Note Frequency Calculator?
From musicians to audio engineers, our tool helps professionals and enthusiasts work with precise note frequencies.
Musicians & Instrumentalists
Need to understand the exact frequencies of notes for tuning, transposition, and understanding instrument acoustics.
Calculate any note's frequency instantly, with adjustable A4 reference for different tuning standards.
Audio Engineers
Require precise frequency information for EQ adjustments, notch filtering, and resonance identification.
Get exact Hz values for any note to apply surgical EQ and identify problematic frequencies in mixes.
Sound Designers
Need to create sound effects at specific pitches or tune samples to match musical content.
Calculate target frequencies for pitch-shifting and understand wavelength properties for synthesis.
Music Students
Learning about acoustics, the physics of sound, and the mathematical relationships between notes.
Visual frequency table and instant calculations help understand equal temperament and musical intervals.
Piano Tuners
Need reference frequencies for all 88 keys with adjustable A4 standard for different pianos.
Complete frequency table with playback to verify tuning and support for orchestral pitch standards.
MIDI Programmers
Converting between MIDI note numbers and actual frequencies for custom instruments and plugins.
See MIDI note numbers alongside frequencies for easy reference when programming synthesizers.
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Ready to Calculate Note Frequencies?
Use our free Note Frequency Calculator to explore the relationship between musical notes and their frequencies. Perfect for musicians, audio engineers, and music enthusiasts.