Calculator
Draw Length Calculator
Use this calculator as a starting estimate, not a pro fitting. Measure your wingspan, divide by 2.5, then confirm the result with the bow in hand if you can. After that, read the main draw-length guide and the arrow-length guide to finish the fit.
Estimate your draw length
Formula: wingspan in inches ÷ 2.5 = estimated draw length.
Measure fingertip to fingertip with arms relaxed and level. Enter the number in inches or centimeters, and the calculator will convert it for you.
- Measure fingertip to fingertip with arms relaxed and level.
- Divide wingspan in inches by 2.5.
- Recheck with actual shooting form or a bow shop if possible.
Three steps to a better fit
The calculator gives a starting estimate. Final fit still depends on anchor point, bow type, and shooting form.
Example estimates
These examples show the wingspan ÷ 2.5 estimate in inches.
| Wingspan | Estimated draw length |
|---|---|
| 65 in | 26.0 in |
| 68 in | 27.2 in |
| 70 in | 28.0 in |
| 72 in | 28.8 in |
| 75 in | 30.0 in |
How to use the estimate
Safety and fit notes
- Too-short or too-long draw length can affect form, anchor point, comfort, and consistency.
- Compound bows should be set within the manufacturer’s draw-length range.
- A coach, bow tech, or archery shop can confirm fit.
Frequently asked questions
Short answers for the most common setup questions.
Is this a pro fitting?
No. It gives a starting estimate from wingspan, then you should confirm fit with actual shooting form or a bow shop.
Can I use centimeters?
Yes. Enter centimeters and the calculator converts the measurement to inches before applying the wingspan divided by 2.5 estimate.
Why can two archers with the same wingspan end up with different fits?
Anchor point, shoulder mobility, release style, and the bow setup itself can all change the draw length that actually feels right.
Does this work for compound bows?
It works as a starting estimate, but compound bows should still be set within the manufacturer draw-length range.
What if the result feels off?
Recheck the measurement, then compare it with the bow in hand or ask a coach, bow tech, or archery shop to confirm fit.
Next steps
After you estimate draw length, use the Arrow Length Calculator to choose a safe starting arrow length before you cut shafts. Then compare that with the bow, the anchor point, and the methods in the main draw-length guide.