Measure your true draw length and set your bow to match — the single highest-impact accuracy fix in archery.
Measure your true draw length and set your bow to match — the single highest-impact accuracy fix in archery. Follow the steps in order — each one builds on the last.
Step 1: Measure your wingspan
Arms out in a T, measure fingertip to fingertip, divide by 2.5 — or use our Draw Length Calculator.
Step 2: Verify at full draw
At anchor, your nose should touch the string, the string should bisect the corner of your mouth, and your bow arm should keep a slight bend.
Step 3: Check the bubble symptoms
Floating anchor, string slapping your forearm, or leaning back at full draw all scream “too long.” Cramped form and a crawling anchor mean too short.
Step 4: Adjust the bow
Rotating-module cams adjust with Allen keys; some cams need a press or new modules. Move half an inch at a time.
Step 5: Re-confirm with the wall test
Stand facing a wall, draw with eyes closed, settle to anchor and open your eyes — the peep should be centered without moving your head.
Why Correct Draw Length Is Critical
Draw length is the most important fit measurement on a compound bow, and getting it wrong sabotages everything else. Too long and you over-extend, lock your elbow, and let your anchor float, which makes consistency impossible. Too short and you crowd your face, lose back tension, and rob the bow of speed. A correct draw length lets you reach a relaxed, repeatable anchor with proper alignment, which is the single biggest accuracy factor most archers never check.
Unlike a recurve, a compound has a hard wall at full draw, so your draw length is fixed by the bow’s setup, not by how far you choose to pull. That means a mismatch is built in until you correct it, and no amount of practice can compensate for a bow that does not fit your body.
What You Will Need
- A tape measure and a helper to measure your wingspan
- Your bow set up so you can reach full draw safely
- A mirror or a video so you can check alignment at anchor
- The module or cam adjustment tools your bow uses to change draw length
Common Mistakes to Avoid
- Setting draw length too long, which is by far the most common fitting error
- Locking the bow arm elbow and over-extending to reach the string
- Crowding the string into your face with a draw length that is too short
- Relying on the wingspan formula alone without confirming at full draw
- Adjusting draw length and forgetting to re-check anchor and sight afterward
Pro Tips for Setting Draw Length
- Start from the wingspan estimate, then refine by feel at full draw
- At correct length your bow arm is comfortably straight, not locked, and your anchor is solid
- Watch for a release hand that wraps cleanly to your jaw or neck without straining
- Err shorter rather than longer, since a slightly short draw is far more forgiving
- Re-check anchor consistency and re-sight after any draw-length change
Final Word
Draw length is the fit that makes every other skill possible. Set it correctly and a relaxed, repeatable anchor falls into place, your alignment improves, and your groups shrink without changing anything else. When in doubt, go a touch short, confirm at full draw, and let your form, not your stretch, reach the wall.
Frequently Asked Questions
How do I estimate my draw length?
Measure your wingspan fingertip to fingertip and divide by roughly 2.5 as a starting point, then refine by feel at full draw.
What happens if my draw length is too long?
You over-extend, tend to lock the bow elbow, and lose a consistent anchor, which is the single most common fit problem.
Is it better to be too long or too short?
Slightly short is more forgiving, since it preserves back tension and a relaxed anchor, while too long wrecks consistency.
Can I adjust draw length myself?
Many compounds adjust via rotating modules or cam settings, though some require a bow press or a pro shop depending on the model.
Do I need to re-sight after changing draw length?
Yes, changing draw length shifts your anchor and arrow speed, so re-confirm your anchor and sight afterward.