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There are two primary factors that determine the best letter size for your sign: distance and speed. Our Letter Sizing Calculator simplifies the math for you.
Distance: Enter the viewing distance (how far away you want your sign to be readable). Our calculator will calculate the minimum readable letter size. It will also provide the recommended letter size for readability.
Speed: Enter the speed limit on your street and the number of seconds you want your sign to be readable. Our calculator will calculate the minimum readable letter size. It will also provide the recommended letter size for readability.
All you do is put in the viewing distance and the calculator will automaticallly show you how big your letters should be.
Approximate Viewing Distance?
Feet
Inches
Minimum Height:
Inches
Height for Easy Readability:
Inches
Height for Maximum Impact:
How far can you read a 4" tall Letter? Or any other size letter for that matter? To find out the answer, just select the letter size from the drop down list below.
Select letter size
Feet
Maximum Viewable Distance:
Feet
Distance for Easy Readability:
Feet
Distance for Maximum Impact:
Let's suppose the speed limit on your street is 45 MPH and you want your message to be readable for 3 full second by passing motorists. How would you know the right letter height? This tool will help you with that. You can also set the street speed limit too!
SPEED
LIMIT
SECONDS OF
VISIBILITY
TOTAL VIEWABLE
DISTANCE
Minimum Readable Letter Size:
Recommended Size For Readability
Height For Maximum Impact