What Is a Fret Calculator and Why You Might Need One
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Introduction
If you’ve ever wondered how to get the frets in the right place on a homemade guitar or cigar box build, you’re not alone. Precision matters – even a few millimeters off, and your notes can sound out of tune. That’s where the Fret Calculator comes in.
This free online tool helps you lay out fret positions based on your chosen scale length – the distance from the nut to the bridge. Whether you’re building a full-size electric guitar or a 3-string cigar box guitar, you just enter a few values, and it does the math for you.
How Fret Calculator Works (No Math Degree Required)
Using the calculator is easy – even if this is your first build:
- Enter your scale length in inches or millimeters. Don’t worry if you’re not sure – common lengths are suggested.
- Choose how many frets you want to calculate (most builds use 20–22).
- (Optional) Add a small Bridge Compensation value (e.g. 0.5 mm) to improve intonation.
- Click Calculate, and boom – your full fret spacing table appears instantly.
- You can then print it or export it as a CSV file for your records or workshop use.
Who Is Fret Calculator For?
This calculator is built for:
- First-time DIY guitar builders
- Cigar box guitar hobbyists
- Luthiers who want a quick reference
- Anyone curious about fretboard math
It’s not just accurate – it’s also designed to be easy, clean, and printable. No popups, no logins, no distractions.
Try It Yourself
Head over to the Fret Calculator Tool and give it a spin. Whether you’re making your first 3-string CBG or designing a custom build from scratch, this tool will save you time and help your frets land right where they should.
