Note to Frequency Calculator
Note to Frequency Calculator
Pick a note and get its exact frequency in Hz. Change the tuning reference, go note-to-Hz or Hz-to-note, and copy any value. Full note frequency chart included.
Note Frequency Chart (Hz)
Values use your tuning reference above. Click any frequency to copy it.
What this note to frequency calculator does
Every musical note has an exact frequency in hertz. This tool gives you that number for any note and octave, so you can set an EQ band, tune an oscillator, line up a resonance, or check a sample in seconds. Switch the tuning reference if you work at 432 Hz or 442 Hz, and it recalculates everything.
How to use it
- Pick the note and octave. The big readout shows the frequency in Hz plus the MIDI note number. Click Copy Hz to grab it.
- Or go the other way. Type a frequency into Frequency to note and it tells you the nearest note and how many cents sharp or flat it is.
- Use the chart. The full table lists every note across octaves. Click any value to copy it straight into your plugin.
How note frequencies are calculated
Each octave doubles the frequency, and an octave is split into twelve equal semitones. Starting from A4 = 440 Hz, the frequency of any note is 440 multiplied by two to the power of the number of semitones away from A4, divided by twelve. That is why A5 is 880 Hz and A3 is 220 Hz.
Tuning to A4 = 432 or 442
Some producers tune to 432 Hz for feel, and many orchestras tune to 442 Hz. Change the tuning reference and the whole chart shifts with it, so your EQ moves and sample pitches stay accurate.
FAQ
What is the frequency of A4?
A4 is 440 Hz by default (concert pitch). You can change it to 432 Hz, 442 Hz or any reference and every value updates.
What frequency is middle C?
Middle C (C4) is about 261.63 Hz at standard A4 = 440 tuning.
How do I find the note of a frequency?
Type the frequency into the Frequency to note box. It returns the closest note, its octave and how many cents it is sharp or flat.
What are cents?
A cent is one hundredth of a semitone. It tells you how far a frequency sits from the nearest in-tune note.
Is this calculator free?
Yes, free forever. The paid upgrade is the plugins on Meshplugins.com that handle tuning and EQ inside your DAW.
Want this dialed in automatically?
This page is the free version. The plugins set tuning and EQ targets right on your track. Pro studio timing, bedroom-friendly.
Real sauce. No fluff.