Draw Length Calculator
Calculate ideal bow draw length from wingspan using the standard archery formula and recommended arrow length.
What Is Draw Length in Archery?
Draw length is the distance from the bowstring nocking point to the grip pivot when the string is fully drawn. It determines bow fit, anchor consistency, and arrow selection. Use our Body Fat Calculator to estimate performance once draw length is known.
How to Calculate Draw Length
Stand naturally with arms extended horizontally and measure wingspan from middle fingertip to middle fingertip in inches. Divide wingspan by 2.5 to estimate ideal draw length. For example, a 70-inch wingspan yields 28 inches of draw length.
Arrow Length Recommendation
Arrows should typically be 1 to 2 inches longer than draw length for safety and clearance. A 28-inch draw length suggests arrows around 29 to 30 inches. Always confirm with your bow technician and local range rules.
Frequently Asked Questions
What is the draw length formula?
Draw length (inches) equals wingspan (inches) divided by 2.5.
How do I measure wingspan?
Extend both arms horizontally, measure from the tip of one middle finger to the tip of the other across your chest.
What if my draw length is too short or too long?
Incorrect draw length can reduce accuracy, transfer less energy to the arrow, and increase injury risk from poor form.
How long should my arrows be?
Choose arrow length about 1 to 2 inches longer than your measured draw length.
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