Draw Length Calculator: Measure Your Archery Draw Length

Example calculation

Let's find draw length using the wingspan method:

This is your estimated AMO draw length. With a 28" draw length, you'd typically shoot 29-30" arrows (adding 1-2" for safety clearance).

Understanding draw length

What is draw length?

Draw length is the distance from the nock point (where the arrow sits on the string) to the throat or pivot point of the bow grip, measured at full draw. The AMO (Archery Manufacturers Organization) standard adds 1.75 inches to this measurement to account for the distance from the grip throat to the back of the bow.

In practical terms, your draw length is determined by your arm span, torso length, and shooting style. It's unique to each archer and critical for proper bow setup.

Why draw length matters

Correct draw length affects every aspect of your shooting:

• Accuracy: Proper draw length allows consistent anchor point and sight picture. Too short or too long makes it impossible to repeat the same shot.
• Comfort: Correct length prevents overextension or hunching. You should feel natural and relaxed at full draw, not stretched or cramped.
• Form and back tension: Proper draw length enables good back tension and strong bone-on-bone alignment. Wrong length forces compensation with muscles instead of skeletal structure.
• Arrow selection: Draw length determines what arrow length and spine you need. It's the foundation of your entire arrow setup.
• Bow performance: Compound bows are designed to perform optimally at specific draw lengths. Wrong draw length affects speed, accuracy, and bow timing.

Draw length and arrow length

Draw length and arrow length are related but different:

• Draw length: Bow-specific measurement from nock point to grip pivot point (+ 1.75")
• Arrow length: The physical arrow length you shoot, typically draw length + 1-2 inches for safety

For example, if you have a 28" draw length, you'll typically shoot 29-30" arrows to ensure they extend past your arrow rest at full draw. Use our arrow length calculator to find your exact arrow length.

How to measure draw length (4 methods)

Method 1: Wingspan method (easiest, at home)

This is the quickest estimation method and works well for most people:

1. Stand against a wall with arms fully extended to the sides (making a "T" shape)
2. Have someone measure from the tip of your middle finger on one hand to the tip of your middle finger on the other hand
3. Divide this measurement by 2.5
4. Result is your estimated draw length

Example: 70" wingspan ÷ 2.5 = 28" draw length
Accuracy: Usually within 0.5-1" of actual draw length. Good starting point but verify with other methods.

Method 2: Wall method (accurate, requires bow)

This method uses your actual bow and shooting form:

1. Stand with your back flat against a wall
2. Draw your bow to your normal anchor point (the position you're most comfortable with)
3. Have someone mark where the nock point is while you're at full draw
4. Measure from the wall to the mark
5. Add 1.75 inches to get AMO draw length

Example: 26.5" wall distance + 1.75" = 28.25" draw length
Accuracy: Very accurate if done correctly. Reflects your actual shooting form.

Method 3: Arrow measurement method

Quick field method using an arrow or dowel:

1. Hold an arrow at the corner of your mouth (typical anchor point)
2. Extend your bow arm forward as if drawing a bow
3. Keep your arm straight and hand in a fist (as if gripping a bow)
4. Have someone mark where your extended knuckles reach on the arrow
5. Measure from the corner of your mouth to the mark
6. This measurement is close to your draw length

Accuracy: Approximate but useful for quick field measurements. Within 0.5-1" typically.

Method 4: Professional draw board (most accurate)

Visit an archery pro shop with a draw board or draw check arrow:

• Draw board: A device that lets you draw a bow while a technician measures your exact draw length
• Draw check arrow: A special arrow with measurement markings that shows your draw length when shot

Accuracy: Most accurate method. Professional measurement accounts for your actual form and anchor point.
Cost: Usually free at pro shops, especially if you're buying a bow or arrows.

🛒 If you need equipment to measure at home, shop bow scales and measuring tools on Amazon.

Draw length considerations by bow type

Compound bows

Compound bows MUST be set to your exact draw length. Unlike traditional bows, you can't overdraw a compound due to the let-off and hard wall. Being off by even 0.5 inches affects:

• Cam timing and synchronization
• Bow speed and energy storage
• Peep sight alignment
• Comfort and shootability

Most modern compounds offer 3-4 inches of draw length adjustment through interchangeable modules or rotating cams. Have a bow technician make adjustments - improper installation can damage your bow.

Recurve bows (Olympic and barebow)

Recurve bows are more forgiving of small draw length variations because there's no mechanical stop. However, you should still find your natural draw length for consistency:

• Olympic recurve: Uses clicker for draw length consistency. Measure carefully and adjust clicker position precisely.
• Barebow: Draw length varies slightly based on anchor point and shooting method (gap, string walking, etc.). Measure at your primary anchor.

Recurve draw length often increases by 0.5-1" as archers develop better back tension and form.

Traditional longbows and self bows

Traditional bows have the most flexibility in draw length since you can draw to any comfortable length. However, consistency is still important:

• Find a natural, comfortable anchor point and measure from there
• Many traditional archers use slightly longer draw lengths than compound shooters
• Draw length affects draw weight (increases ~2-3 lbs per inch)

Traditional shooters should measure draw length with their actual shooting form and anchor point, which may differ from compound or Olympic recurve style.

Typical draw lengths by height and age

Adult draw lengths by height

These are averages. Individual proportions vary. Always measure rather than estimating from height alone.

Youth draw lengths by age

Youth draw lengths change rapidly. Re-measure every 6-12 months or when form feels awkward.