Primarily, but not solely. The fret spacing, and the progression of frets along the fretboard as you move toward the bridge, are based on the equal-tempered scale, and are primarily based on the total length of the string from nut to bridge.
- What determines fret spacing?
- Does scale length affect fret spacing?
- How much space should be between string and fret?
- How do you measure fret spacing on a guitar?
What determines fret spacing?
If you divide any scale length by the constant 17.817, you will get the distance from the front edge of the nut to the first fret. Here is one example: a scale length of 25.5" (650mm) divided by 17.817 gives 1.4312173" (36.482011mm), which can be rounded down to 1.431" (36.48mm).
Does scale length affect fret spacing?
Fret spacing
As scale length increases, the distance between frets also increases. While you might not notice any difference between similar scale guitars, you would definitely notice it on a baritone guitar or a Fender Jaguar. For most guitarists, the fret spacing isn't going to make much of an impact on playability.
How much space should be between string and fret?
The distance between the strings and the neck at the 12th fret should be about 1.6 millimetres (0.063 in), or the width of a dime. Hold the flat end of a ruler against the neck and measure how high the strings are. If the strings are further than 1.6 millimetres (0.063 in), (high action) you need to lower the bridge.
How do you measure fret spacing on a guitar?
Divide any scale's open string length by 17.817, and the result is the distance from the front edge of the nut to the first fret. For several centuries, this number was rounded to 18 and referred to as the “rule of 18.” For example, a typical guitar scale length (Fender Telecaster) is 25.5 inches (648 mm).