America's ADA and Custom Signage Professionals

Letter Visibility Chart

This letter visibility chart has been made for you based upon information provided by Pennsylvania Transportation Institute, Penn State University and the United States Sign Council (USSC).c1998

Calculations based on externally (or naturally) lit sign with all upper case Helvetica letters utilizing optimal negative space.  Factors that may affect required letter size are: color scheme, font selection, traffic and weather conditions, or sign standoff.  Please refer to the complete study for additional information.  For further details contact the USSC at 1 (215) 785-1922.

 Viewing Distance

Minimum Required Letter Height
(in inches)

100 ft. 4"
250 ft. 10"
360 ft. (city block) 16"
500 ft. 22"
750 ft. 33"
1000 ft 43"
1320 ft. (1/4 mile) 57"

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3407 W Barcelona Street Tampa, Florida 33629

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