Fret Calculator

- May 10, 2025
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Calculate fret positions for stringed instruments. This calculator determines the exact spacing of frets based on scale length, fret count, and compensation factors to ensure proper intonation.

Instrument Type

Scale Length

Fret Configuration

Intonation Compensation

Advanced Options

About Fret Calculations

Proper fret placement is crucial for the intonation of stringed instruments. The calculations are based on the mathematical principle of equal temperament, which divides an octave into 12 equal semitones.

Scale Length

The scale length is the vibrating length of a string, measured from the nut to the bridge. It's a fundamental parameter that affects the tone, playability, and feel of the instrument.

  • Common Guitar Scale Lengths: 24.75" (Gibson), 25.5" (Fender)
  • Common Bass Scale Lengths: 30", 32", 34", 35"
Intonation Compensation

In practice, perfect mathematical fret placement may require slight adjustments due to:

  • String Deflection: The height of the strings above the fretboard
  • String Tension: The stiffness and elasticity of the strings
  • String Gauge: Thicker strings may require more compensation
Multi-scale (Fan Fret) Designs

Multi-scale or fan fret instruments use different scale lengths for different strings:

  • Benefits: Improved string tension balance, enhanced ergonomics, clearer bass response
  • Perpendicular Fret: The fret where all scales align at right angles to the centreline

Understanding the Fret Calculator

The Fret Calculator is a handy tool for musicians who play stringed instruments. It helps you figure out where to place frets based on various factors like scale length and the number of frets. By using this calculator, you can ensure your instrument has the right intonation, which is key for playing in tune.

Choosing Your Instrument Type

When you start using the Fret Calculator, the first step is to select the type of instrument you’re working with. You can choose from three options: Guitar, Bass Guitar, or even a Custom Instrument. This flexibility allows for accurate measurements tailored to the specific needs of different stringed instruments. Picking the right type is essential for getting the best results.

Inputting Scale Length

The scale length is vital for calculating fret positions. It refers to the distance between the nut and the bridge of the instrument. You can enter this measurement in inches, millimetres, or centimetres. Here’s why it matters:

  • It affects the tone: Different scale lengths can change how notes sound.
  • Playability: A correct scale length makes it easier to play.
  • Feel: It impacts how the instrument feels when you play.

Configuring Fret Count

Alongside scale length, you’ll need to specify how many frets your instrument has. The Fret Calculator lets you input a range from 12 to 36 frets. This information is crucial since it influences the spacing between each fret. More frets can mean tighter spacing, which can affect how the instrument plays overall.

Intonation Compensation Options

Intonation compensation is an advanced feature of the Fret Calculator. It allows you to adjust the fret positions slightly to ensure better tuning across the fretboard. Some of the factors you can consider include:

  • String action height: This is how high your strings sit above the fretboard.
  • String gauge: Thicker strings may need different compensation compared to thinner ones.
  • Compensation factor: Choose from light, standard, or heavy options for optimal results.

Advanced Features and Visualisation

The Fret Calculator also includes advanced settings for those who want more control. You can adjust the number of decimal places for accuracy and choose how the results are displayed—whether in inches, millimetres, or centimetres. Plus, you can view visualisations of fretboard layouts, making it easier to see how your settings translate to actual fret positions.

Learning from Fret Calculations

Understanding how to use the Fret Calculator not only helps with practical applications but also enhances your knowledge of Music theory. Proper fret placement is critical for intonation, which ensures your instrument sounds great when you play. The calculations are based on the equal temperament system, which divides an octave into twelve equal parts, making it easier for musicians to play in tune across various keys.

Getting the Most from the Fret Calculator

To maximise the benefits of the Fret Calculator, take the time to input accurate data. Pay close attention to your instrument type, scale length, and number of frets. This tool is designed to help you achieve precise fret placements, so investing effort in getting your measurements right will pay off in your overall playing experience.