Crime rates are indicators of reported crime activity standardized by population.  They are more refined indicators for comparative purposes than are volume figures. 

A crime rate, defined as the number of offenses per 100,000 population, is derived by first dividing a jurisdiction’s population by 100,000 and then dividing the number of offenses by the resulting figure. 

Example: 

a. Population for Jurisdiction, 75,000

b. Number of known burglaries for Jurisdiction for a year, 215

Divide 75,000 by 100,000 = .75

Divide 215 by .75 = 286.7

The burglary rate is 286.7 per 100,000 inhabitants.

The number .75 can now be divided into the totals of any offense class to produce a crime rate for that offense.  The same procedure may be used to obtain arrest rates per 100,000.

 

Excel Formula

                         COLUMN B     COLUMN C      COLUMN D

ROW 6               75,000          215                =SUM(C6/B6)*100000