Specialized Marking, Reading and Tracking Solutions
Code 39 Length Calculator
L = (C + 2)(3N + 6)X + (C + 1)I
where
C = total number of data characters (no
checksum)
X = X-dimension (width of the smallest element in
mils.)
N = wide-to-narrow multiple (e.g. 3 for a code with 3
: 1 ratio)
I = inter-character gap width in mils
L = length of symbol (not including quiet zone,
output in mils)
This calculator will compute the length of a Code
39 bar code given the total number of
data characters, X dimension and wide-to-narrow ratio. For simplicity,
this calculator assumes that the inter-character gap equals
the X-dimension, which is correct for many printers such as laser printers.
Note that a quiet zone is required on each end of the code that is
equal in length to 10 times the X-dimension.
