Enter the real speed (mph) and the scale into the Scale Speed Calculator. The calculator will evaluate the Scale Speed. 

Scale Speed Formula

The following two example problems outline the steps and information needed to calculate the Scale Speed.



  • SS is the Scale Speed (mph)
  • RS is the real speed (mph) 
  • S is the scale 

To calculate a scale speed, divide the real speed by the square root of the scale.

How to Calculate Scale Speed?

The following steps outline how to calculate the Scale Speed.

  1. First, determine the real speed (mph). 
  2. Next, determine the scale. 
  3. Next, gather the formula from above = SS = RS / SQRT(S).
  4. Finally, calculate the Scale Speed.
  5. After inserting the variables and calculating the result, check your answer with the calculator above.

Example Problem : 

Use the following variables as an example problem to test your knowledge.

real speed (mph) = 100

scale = 2.5

SS = RS / SQRT(S) = ?