Trusted by thousands of rod builders. Our KR guide spacing calculator finds ideal guide placement for your rod in seconds.
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The guide spacing calculator is extremely accurate for its intended use. It’s built around Fuji’s proven New Guide Concept (NGC) and KR Concept spacing systems used by thousands of rod builders worldwide. While minor adjustments may be needed for personal preference or unique builds, most users report excellent results without any test casting.
The calculator supports spinning rods from 5’6″ to 9′ in length and is optimized for Fuji guide systems, including:
It works with all Fuji rod building components distributed by Angler’s Resource and is suitable for light freshwater to inshore saltwater applications.
The calculator is specifically designed for spinning rods and uses Fuji’s choke guide placement and line flow methodology. It’s not intended for baitcasting rod layouts, which require a different guide spacing strategy based on line path and blank deflection.
The Fuji KR Concept is a guide layout system developed for spinning rods using braid and light lines. It features:
The calculator incorporates this concept, giving you access to its spacing logic without doing the math yourself.
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