The calculation method determins how FretFind calculates fret placement. There are two input modes. Equal: uses the X^th root of two, a standard method for calculating equal temperaments. You enter the number of tones per octave. Scala: uses a Scala SCL file which allows you to specify each scale step exactly in either ratios or cents. If you are interested in creating your own scale, please read this description of the Scala scale file format. Otherwise try a scale from the Scala scale archive, found at the very bottom of the Scala download page. You can learn more about Scala at the Scala home page.

This is the number of frets you would like FretFind to calculate. The number of frets must be an integer.

The number of strings must be an integer. If you change the number of strings click "Update" to update the section below. Clicking "Update" will remove all values from the table below.

Define the extents of your guitar on a coordinate plane. You are asked to place the end points of each string and the end points of both fretboard edges. Because FretFind uses SVG for visualization you may want to use the SVG coordinate system. The point (0,0) is in the top left of your screen and values for x and y increase to the right and bottom respectively. A properly oriented standard guitar will have larger x values for the high E than for the low E and larger y values for the bridge than for the nut.

For tuning enter the scale step (of the scale defined above) to which each string will be tuned. For example a standard guitar in the key of E would be tuned 0, 7, 3, 10, 5, 0. The first string is the string to the far right on the fretboard. Tuning is not important for the Equal calculation method. Entering a tuning for the Scala calculation method will very likely result in partial frets.