This spine calculator is intended as a tool to provide a simple point of reference for initial testing.
By entering your draw weight and approximate total arrow length (whole numbers) a chart will be generated providing the approximate spine needed for various total amounts of weight at the front of the shaft. "Spine A" & "Spine B" is providing a high/low reference for you to evaluate based on how aggressive your bow is, exactly how much weight you plan to have up front, etc.
Again, this is for reference only and is best utilized to help choose test arrows before proceeding with a full build.
If this tool does not calculate, please refresh the page and try again. We are working to correct this issue
Arrow Length
(inches)
Draw Weight
(pounds)
| Total Weight Up Front (Component + Point) | <125gr | <175gr | <225gr | <275gr | <325gr | <375gr | <425gr |
|---|---|---|---|---|---|---|---|
| Spine A | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Spine B | 0 | 0 | 0 | 0 | 0 | 0 | 0 |