Enter the total number of encounters and the total chances for encounters into the Calculator. The calculator will evaluate the Encounter Rate. 

Encounter Rate Formula

ER = E / C * 100


  • ER is the Encounter Rate (%)
  • E is the total number of encounters
  • C is the total chances for an encounter

To calculate Encounter Rate, divide the total number of encounters by the number of changes for an encounter.

How to Calculate Encounter Rate?

The following steps outline how to calculate the Encounter Rate.

  1. First, determine the total number of encounters. 
  2. Next, determine the total chances for an encounter. 
  3. Next, gather the formula from above = ER = E / C * 100.
  4. Finally, calculate the Encounter Rate.
  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.

total number of encounters = 78

total chances for encounter = 100