Fret Calculator

Category: Music
- July 20, 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

What is the Fret Calculator?

The Fret Calculator is a handy tool designed for stringed instrument players. It helps musicians determine the precise distances for frets based on various factors. You can easily adjust settings like scale length and fret count to get accurate results. This calculator is useful for guitars, bass guitars, and even custom instruments. Whether you’re a beginner or an experienced artist, it makes fret placement simple and straightforward.

Understanding Scale Length

Scale length is a key measurement in fret calculations. It’s the length of the vibrating string, measured from the nut to the bridge. Different instruments have different scale lengths. For example, guitars typically range from 24.75 inches to 25.5 inches, while bass guitars can vary from 30 inches to 35 inches. Here’s a quick look at common measurements:

  • Guitar: 24.75" (Gibson), 25.5" (Fender)
  • Bass Guitar: 30", 32", 34", 35"

Choosing Your Instrument Type

When using the Fret Calculator, you first select the type of instrument you’re working with. The options include guitar, bass guitar, or a custom instrument. Each type has unique specifications that affect fret placement. By choosing your instrument type, you ensure that the calculator provides results tailored to your needs. This step is essential for getting the most accurate fret positions for your instrument.

Inputting Fret Count and Constants

Another important step is entering the number of frets you want on your instrument. The calculator allows you to choose between 12 to 36 frets, depending on your instrument's design. Additionally, you can input the fret constant, which is crucial for accurate calculations. This constant is typically set to about 1.05946, based on the 12th root of 2, a standard value used in Music theory.

Intonation Compensation Explained

Intonation compensation is a feature that adjusts fret positions for better tuning accuracy. This is important because the way strings vibrate can create slight discrepancies in pitch. The calculator allows you to apply compensation based on various factors, like string action height and gauge. Here are some key points to think about:

  • String Action: Height of the strings above the fretboard.
  • String Tension: The stiffness and elasticity of the strings.
  • String Gauge: Thicker strings may need more adjustment.

Advanced Options for Precision

For those looking for more control, the Fret Calculator offers advanced options. You can select the number of decimal places for your results and choose how units are displayed. This ensures you get the results in the format that suits you best. You can also opt to show visualisations and cumulative distances, making it easier to understand how frets are laid out on your instrument.

Results and Visualisation

Once you’ve filled in all the required information, the Fret Calculator provides a detailed output. Not only will you see the distance of each fret from the nut, but there’s also a visualisation feature. This helps you imagine how the frets will look on your instrument. The output includes a fret spacing table, which is great for quick reference during builds or modifications.

Why Proper Fret Placement Matters

Getting fret placement right is crucial for good intonation on stringed instruments. Properly spaced frets ensure that each note sounds in tune, making your playing experience more enjoyable. The Fret Calculator simplifies this process, allowing musicians to focus more on playing and less on guesswork. With its accurate calculations and helpful features, you can greatly improve your instrument's performance and sound quality.