Letter Visibility Chart

This is based on dark text on a white background in clear weather conditions.

Letter Height
3 in
4 in
6 in
8 in
9 in
10 in
12 in
15 in
18 in
24 in
30 in
36 in
42 in
48 in
54 in
​60 in

Max Impact Distance
30 ft
40 ft
60 ft
80 ft
90 ft
100 ft
120 ft
150 ft
180 ft
240 ft
300 ft
360 ft
420 ft
​480 ft
540 ft
​600 ft

Max Readable Distance
100 ft
150 ft
200 ft
350 ft
400 ft
450 ft
525 ft
630 ft
750 ft
1000 ft
1250 ft
1500 ft
1750 ft
2000 ft
2250 ft
​2500 ft