Arrow Spine Calculator
Determine the correct arrow spine based on draw weight, draw length, point weight, and string type for optimal arrow flight.
Inputs
lbs
in
gr
Results
Recommended Spine
550
Acceptable Range500 - 600
Over-Spined (too stiff)450
Under-Spined (too weak)650
How to Use This Calculator
- Enter your Draw Weight in pounds at your draw length.
- Set your Draw Length in inches.
- Enter the Point Weight in grains.
- Select your String Type (Dacron or modern Fast Flight).
- Review the Recommended Spine deflection value, Acceptable Range, and Over/Under-Spined thresholds.
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