Letter Visibility Chart

This chart is base on uppercase Helvetica lettering in natural lighting situations with optimal negative space.

Viewing Distance Max. Impact Distance Min. Required Letter Height
100 feet 30 feet 3 inches
150 feet 40 feet 4 inches
175 feet 50 feet 5 inches
200 feet 60 feet 6 inches
275 feet 70 feet 7 inches
350 feet 80 feet 8 inches
400 feet 90 feet 9 inches
450 feet 100 feet 10 inches

Other factors that may affect visibility and letter size requirements are: font selection, color scheme, traffic and weather conditions and sign standoff.

Last updated: December 5, 2008

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