it is the distance from the nock factor of the throat to the grip of the bow +1.75”.
The draw period is the pull-in inches from the apex of the string to the throat of the grip.
For accurate estimation relative to wingspan need to use the draw period calculator.
Measuring draw length is simple and calls for simplest three steps:
The system for calculating the bow length is:
Where:
DL = Draw period in Inches
WS = Wingspan in Inches
To measure draw length of the bow add + 1.75″
suppose the wingspan of the archer is 40 inches. How do you measure the draw duration on a compound bow?
Step 1: Use the formula to calculate draw length:
DL = WS / 2.5
Substitute the values:
DL = 40 / 2.5
DL = 16 inches
Step 2: Convert draw length to centimeters:
DL in centimeters = 16 × 2.54
DL in centimeters = 40.64 cm
Step 3: Calculate the draw length of the bow:
Add 1.75 inches to the draw length:
DL of Bow = 16 + 1.75
DL of Bow = 17.5 inches
Step 4: Convert the draw length of the bow to centimeters:
DL of Bow in centimeters = 17.5 × 2.54
DL of Bow in centimeters = 44.45 cm
To make your goal extra precise and accurate, using the arrow length calculator is a high-quality choice for determining the draw duration.
From the supply of bowhunting.com: Draw length