Enter the speed (mph) and the reaction time (ms) into the Reaction Distance Calculator. The calculator will evaluate and display the Reaction Distance.
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Reaction Distance Formula
The following formula is used to calculate the Reaction Distance.
Dreact = S*5280/3600 * T/1000
- Where Dreact is the Reaction Distance (ft)
- S is the speed (mph)
- T is the reaction time (ms)
How to Calculate Reaction Distance?
The following example problems outline how to calculate Reaction Distance.
Example Problem #1:
- First, determine the speed (mph).
- The speed (mph) is given as: 60.
- Next, determine the reaction time (ms).
- The reaction time (ms) is provided as: 500.
- Finally, calculate the Reaction Distance using the equation above:
Dreact = S*5280/3600 * T/1000
The values given above are inserted into the equation below and the solution is calculated:
Dreact = 60*5280/3600 * 500/1000 = 44 (ft)
Example Problem #2:
For this problem, the variables needed are provided below:
speed (mph) = 70
reaction time (ms) = 350
This example problem is a test of your knowledge on the subject. Use the calculator above to check your answer.
Dreact = S*5280/3600 * T/1000 = ?