Choose the Tuning
The tuning establishes the starting MIDI note for each open string. Standard tuning is loaded first, while alternate tunings can be selected from the menu.
RONTER AUDIO LAB · GUITAR PITCH TOOL
Use this guitar fret frequency calculator to find the note, MIDI number and frequency produced at any fret on a six-string guitar. Choose a tuning, select a string and fret, then explore how pitch changes one semitone at a time across the neck.
An interactive music utility from Ronter Sound and the Ronter Audio Lab tool collection.
FRET · NOTE · MIDI · FREQUENCY
Select a tuning and reference pitch, then click any position on the fretboard. The calculator updates the note name, MIDI number, frequency, interval and related pitch information immediately.
Shift the current note by semitones and compare its new note, MIDI value and frequency.
Calculations use twelve-tone equal temperament. With A4 set to 440 Hz, each semitone changes frequency by a factor of the twelfth root of two. You can change the A4 reference value to compare another reference pitch.
FROM FRET NUMBER TO HERTZ
A fretted guitar organizes pitch into semitone steps. When you move one fret higher on the same string, the sounding pitch rises by one semitone. Twelve frets produce twelve semitone steps, bringing you to the same note name one octave above the open string.
The calculator begins with the MIDI value of the open string. The selected fret number is added to that value, and the resulting MIDI note is converted to frequency using the selected A4 reference.
The tuning establishes the starting MIDI note for each open string. Standard tuning is loaded first, while alternate tunings can be selected from the menu.
Each guitar string begins at a different open pitch. Choosing the string sets the starting point for the fret calculation.
Every fret adds one semitone. The interactive board lets you jump directly to any position from the open string through fret 24.
The resulting pitch is shown as a note name, MIDI number and frequency, with additional information for intervals and transposition.
THE PATTERN ACROSS THE NECK
The guitar fretboard is a physical layout of repeating pitch relationships. Move one fret and you move one semitone. Move twelve frets and the frequency doubles, producing the octave above the starting note.
That makes fret numbers directly useful for frequency calculations. An open E4 string in standard tuning is MIDI 64. Fret 1 becomes MIDI 65, fret 2 becomes MIDI 66, and the twelfth fret reaches MIDI 76, which is E5.
If you want to explore more music utilities beyond frequency, the Audio Tools for Recording, Mixing, and Ear Training collection offers additional interactive exercises and calculators.
This repeating relationship makes octave positions particularly easy to understand. The note name returns after twelve frets, but the frequency is doubled. Another twelve-fret movement doubles it again.
NOTES AND NUMBERS
MIDI note numbers provide a convenient numerical representation of chromatic pitch. Adjacent semitones use adjacent integers, so fret movement can be represented with simple addition.
This relationship is useful when moving between fretboard positions, MIDI-based music tools and frequency values without treating them as separate systems.
REFERENCE PITCH
The frequency calculation needs a reference point. This tool begins with A4 at 440 Hz and calculates other equal-tempered notes relative to that value.
The reference field is editable. If you enter another A4 frequency, every calculated note frequency changes with it while the note names, MIDI values and fret relationships remain the same.
For musicians moving from technical pitch relationships into practical listening, the Interactive Online Audio Mixer and Mixer Console Simulator provide different ways to explore how musical material behaves inside a complete mix.
WHAT YOU CAN COMPARE
Find matching pitches on different strings and confirm that the same equal-tempered note produces the same calculated frequency.
See exactly how many semitones separate the open pitch from a selected fret.
Compare fret 0 with fret 12, or fret 12 with fret 24, to see the frequency-doubling relationship directly.
Change the open-string pitches and let the entire interactive fretboard rebuild around the new tuning.
INTERACTIVE PITCH EXPLORATION
The calculator can be used as a quick guitar fret frequency tool or as a way to study the numerical relationships behind the fretboard. Instead of memorizing isolated frequencies, you can move around the neck and watch note names, MIDI numbers and hertz values change together.
Choose the guitar string and fret. The tool identifies the resulting equal-tempered note and calculates its frequency from the current A4 reference.
The open-string MIDI number plus the fret number gives the MIDI value of the fretted pitch.
The fret number itself tells you the semitone distance. The calculator also names common intervals within the octave.
Use the transposition controls to shift the selected pitch by single semitones or full octaves and compare the resulting frequency.
Yes. Changing an open string changes the starting pitch, so every fret on that string moves with it.
FROM CALCULATION TO PLAYING
Frequency becomes more meaningful when it is connected to something you can hear and play. Select a position, read its frequency, then use the Hear Note button to generate a short reference tone through the browser.
The synthesized tone is a reference for the calculated pitch rather than a simulation of guitar tone. A real guitar contains harmonics, attack, decay, pickup or microphone coloration and other details that make the instrument much richer than a simple oscillator.
If you are preparing real guitar performances for recording, the Instrument Recording Studio page covers the tracking side of that process. For broader musical styles and arrangements, explore music genre recording services.
EXPONENTIAL PITCH
Equal temperament divides an octave into twelve equal pitch ratios, not twelve equal additions in hertz. Each semitone multiplies the previous frequency by the same ratio.
PRACTICAL USES
Move through frets while watching the note, MIDI and frequency values update together.
Compare open, 12th-fret and 24th-fret positions and observe the doubling of frequency.
Change the tuning and immediately rebuild the pitch map for every string.
Translate physical fret positions into MIDI numbers that can be used in digital music workflows.
PITCH IS ONLY ONE PART OF THE SOUND
A frequency value identifies the fundamental pitch in a useful mathematical way, but a recorded instrument is shaped by far more than that single number. Performance, articulation, harmonic content, instrument tone and the recording chain all contribute to what you finally hear.
Musicians developing a song can continue with song demo production, while the music and instrument recording page covers complete tracking projects.
Once the tracks exist, frequency relationships become part of a much wider balance. The mixing and mastering process deals with those recorded elements as parts of the complete production.
KEEP EXPLORING
Technical understanding becomes most useful when it supports a musical goal. These resources continue from instrument practice into performance and recording.
Prepare for the practical side of your first recording session.
PERFORMANCE Musician Psychology and Recording ConfidenceExplore the human side of performing when the record button is on.
ENGINEERING Working With an Audio EngineerSee how musical performances move through the recording process.
MUSIC Music as the Language of the SoulStep away from the numbers and return to expression, communication and the musical idea itself.
PLANNING A RECORDING PROJECT?
Knowing the notes and fret positions is useful, but preparation also means being comfortable with the complete part, tuning and arrangement. Artists traveling for a focused session can review the recording guide for international artists or the broader studio travel information.
Musicians coming from New York can also use the New York recording studio travel guide when organizing a dedicated recording day.
FRET → NOTE → FREQUENCY
Select a string, move across the frets and compare the same musical information in several forms: physical fret position, note name, semitone distance, MIDI number and frequency. Use transposition when you want to continue beyond the selected fret position.
Visit the Audio Tools for Musicians collection for more interactive ways to explore instruments, harmony, pitch and musical relationships.
Go beyond individual audio tools. Arrange multiple tracks, edit clips, build modular effect chains, add modulation, mix through a Master bus, save projects and export the finished mix to WAV.
Explore 168 free browser-based tools for musicians, singers, producers, engineers and creators. Open a category to find your next tool.
I build Ronter Sound Lab and the audio tools on this website as free resources for musicians, producers and creators. If these tools are useful to you and you would like to support the project, any voluntary contribution helps me continue developing the free online DAW, create new tools, improve existing features and keep everything available to everyone.
Every contribution, large or small, is sincerely appreciated. Thank you for supporting independent development.