Draw Length Calculator
Use your arm span to estimate the ideal draw length for compound, recurve, and traditional bows. Accurate draw length improves comfort, accuracy, and arrow speed.
Measurements
Stand against a wall with arms outstretched to measure wingspan. Optionally enter height for comparison.
Recommended Draw Length
Standard draw length
28″
Based on wingspan ÷ 2.5 (70″ ÷ 2.5)
Compound bow setting
27″
Subtract 1″ for anchor clearance and release aid.
Recurve/traditional
28″
Match bow length to draw for optimal stacking.
Converted measurements
Wingspan: 70″ (177.8 cm)
Height: 68″ (172.7 cm)
Notes
- Height-based method suggests 27.2″. Consider averaging with wingspan-based result.
How to Use This Calculator
Measure wingspan
Stand tall with arms extended, palms facing forward. Have a helper mark fingertip to fingertip distance—or measure from wall marks.
Enter measurements
Input wingspan (and optionally height) using inches or centimeters. Consistency matters for accurate conversion.
Adjust your bow
Set compound draw stops near the recommended length. Test shot groups and comfort, making micro adjustments of 0.25″ as needed.
Formula
Draw Length ≈ Wingspan (in) ÷ 2.5
- Compound bow recommendation subtracts 1″ to account for release aids and anchor point.
- Height-based method: Draw Length ≈ Height (in) ÷ 2.5. Useful when wingspan equals height.
- Fine adjustments: increase or decrease by 0.25″ to optimize posture and contact points.
Example: Wingspan = 70″ → Draw length ≈ 28.0″. Compound bow setting ≈ 27.0″.
Why Draw Length Matters
Proper draw length keeps the anchor point consistent, maximizes arrow speed, and prevents overextension of the shoulder. A draw length that is too long forces archers to lean back, reducing accuracy. Too short limits power and can cause a cramped stance.
After setting draw length with this calculator, verify with shooting form—string should touch the tip of the nose and the rear sight aligns comfortably with eye level.
Frequently Asked Questions
What if my wingspan doesn’t equal my height?
It’s common for wingspan to differ slightly. Use wingspan for accuracy and compare with height. Large differences may hint at posture or measurement error.
How precise should draw length be?
Start with the calculator result, then fine-tune in 0.25″ increments while shooting. Comfort and consistent anchor points matter most.
Does release style change draw length?
Yes. Wrist-strap releases often shorten effective draw length compared to handheld releases. Adjust the compound bow stop accordingly.
Should beginners get professionally fitted?
Absolutely. Use this calculator as a starting point, then visit a pro shop for form evaluation and exact equipment setup.