Arrow Spine Calculator
Enter actual bow weight, arrow cut length, bow type, and point weight to look up an educational static-spine range from Easton's 2026 hunting-arrow chart.
Use the Arrow Spine Calculator
Your Setup
Compound: peak weight. Recurve/longbow: actual weight measured at your draw length.
Setup context only; actual recurve/longbow weight must be measured at this length.
Throat of nock to end of shaft, not including point or insert.
Leave blank for standard 100 gr field point.
Educational chart lookup only. Assumes an all-carbon hunting shaft, a 100-grain screw-in point, and—for compounds—a release aid and 301–340 FPS ATA rating. It does not model bow speed, finger release, inserts/outserts, shaft-family availability, or final tuning. Verify against the current manufacturer chart or a qualified archery technician before shooting. Source: Easton 2026 Arrow Guide, p. 59.
Common Static Spine Labels
| Spine | Deflection | Relative stiffness |
|---|
Summary
Enter actual bow weight, arrow cut length, bow type, and point weight to look up an educational static-spine range from Easton's 2026 hunting-arrow chart.
How it works
- Enter compound peak weight, or actual recurve/longbow weight measured at your draw length.
- Enter draw length as setup context and arrow cut length from the throat of the nock to the end of the shaft.
- Select compound, recurve, or traditional longbow to use the matching Easton chart poundage column.
- Point weights above or below the 100-grain chart baseline adjust chart weight by 3 lb per 25 grains.
- Arrow length is rounded to the nearest chart column (half-inch values round up), then the chart cell supplies a spine range.
- Confirm the range in the current manufacturer chart for the exact shaft model and tune the complete setup.
Use cases
- Selecting arrows for a new compound bow setup.
- Switching from target to hunting arrows and re-matching spine.
- Helping beginner archers choose off-the-shelf shaft options.
- Verifying an existing arrow selection before buying in bulk.
- Cross-checking a pro-shop recommendation.
- Adjusting spine selection after adding a heavier field point.