Scale Length for 7 and 8 String Guitars: What to Expect

Why Scale Length Matters

Scale length is the distance from the nut to the bridge saddle. On an electric guitar it is usually measured along the string. The longer this distance, the higher the tension needed to reach a given pitch. Shorter scales feel easier under the fingers but produce a softer, warmer tone. Extended-range guitars add a low string or two, which changes what you need from scale length.

Manufacturers do not agree on a single scale length for seven- and eight-string guitars. Some use the same length as a classic six-string, others add an inch or more. The right choice depends on your tuning and how you play. As Martin notes in its acoustic guitar types guide, even small differences in scale length can change the voice of an instrument: their 000 and OM models share the same shape but differ only in scale length, and that difference is enough to alter the response. You can explore the basics further in our scale length explained article.

How Seven-String Guitars Approach Scale Length

A seven-string guitar adds a low B string below standard E. To keep that B string from being too loose, many builders lengthen the scale slightly. A longer scale gives the low string more tension, which helps it stay in tune and articulate cleanly. If the scale stays at a typical six-string length, the low B can feel rubbery, especially in adventurous tunings.

The tradeoff is that a longer scale spreads the frets farther apart, making stretches more demanding. Players with smaller hands may prefer a shorter scale and rely on heavier string gauges to keep tension up. You can learn more about tuning options in our guide to 7-string tunings and the difference between 6- and 7-string electrics in this comparison.

Eight-String Guitars and Tension

Eight-string guitars typically add an even lower F# or E string. At those pitches, a standard scale length struggles to deliver enough tension. Some builders respond with a slightly longer scale, while others turn to fan frets. A fan-fret guitar has a shorter scale on the high strings and a longer one on the low strings, which gives each string a tailored tension. This idea is covered in more depth in our Multiscale Guitars article.

Even with a longer scale, you may need thicker strings for the low end. Heavier strings increase tension, but they can also feel stiff in the upper registers. Many players find that a fan-fret design or a slightly longer scale is the best compromise for extended-range 8-string playing.

Playability and Hand Reach

Scale length has a direct effect on playability because it determines the spacing of the frets. A longer scale means wider fret spacing, which can be a challenge for chord stretches and fast runs. For players with long fingers, this can actually feel more comfortable; for average or small hands, it can cause fatigue.

The shape and size of the guitar body also matter. As Martin explains, different body sizes have different scale lengths and respond differently to playing. While that guide focuses on acoustics, the same principle applies to electric extended-range models. A larger body may help balance the neck, but the feel of the neck is what you will notice first. See our piece on guitar scale and body size for more.

Tuning, Strings, and Tension

Your chosen tuning is the biggest factor in deciding scale length. If you plan to play in standard tunings or light drop tunings, a conventional scale length may be perfectly fine. For heavier detuning, you will need more tension. That tension can come from a longer scale or from thicker strings, but the two feel very different.

String gauge is tied to tension. A thicker string of the same length produces more tension at a given pitch, which is why players who use shorter scales often choose heavier sets. You can read more about string tension and check out our guitar string gauge guide to find a pairing that works.

What to Pick for Your Use

In the end, there is no right answer. Start with the music you want to make. If you play mostly in standard tuning and want something familiar, a guitar built with the same scale as a common six-string is a good starting point. If you love low tones and heavy riffs, look for a model with a longer scale or a fan-fret design.

The best way to know is to try guitars in person. Pay attention to how the low strings feel when you bend and when you play a chord. Also consider the quality of the instrument. Brands like Ibanez have a long history of developing innovative designs, so they often offer more extended-range options. If you are new to 7-string, you might start there before jumping to an 8-string.

What to pick for your use

Questions

Do all 7-string guitars have longer scale lengths than 6-strings?

No. Many 7-string models use the same scale length as a standard 6-string, while others lengthen the scale slightly. The manufacturer decides based on the target tuning and sound. If you are playing in standard tuning, a conventional scale is common; if you detune, a longer scale helps.

Can I use a 6-string guitar to play 7-string music?

Technically you can tune a 6-string to the lower pitches, but you will miss the added low string and the tension will be low unless you use heavier strings. A 7-string offers a dedicated B string with the right gauge and scale, making the low end more playable.

What is a fan-fret guitar?

A fan-fret guitar has a longer scale on the bass strings and a shorter scale on the treble strings. This balances tension across the instrument, which is especially useful for extended-range guitars.

How much does scale length affect string tension?

At the same pitch, a longer string needs more tension to reach that pitch, assuming the same string gauge. So scale length is one of the main ways makers control the feel of a low string. You can compensate with heavier strings, but the overall feel changes.

Should I choose a longer scale for drop tuning?

If you play in low drop tunings, a longer scale can keep the low notes focused and prevent flabbiness. However, it also makes the frets wider, so you need to tolerate the extra stretch. Try different lengths to find what feels right.