AM allows you to create and use your own formulas to calculate test results. This section presents the operators and variables that you can use in formulas and provides you with examples of formulas.

### Operators you can use in formulas

+ (addition) and - (substraction)

/(division)

(multiplication)

^ (power)

() parenthesis

### Variables you can use in formulas

**age**=student age calculated using the student birth date, according to the information stored in the student list.**gender**=student gender according to the information stored in the student list

Any symbol available in the Symbol box of any test of the test library

### Example **1**: A simple formula to calculate Body Mass Index

(bweig/bheig^2)*703**bweig**=symbol associated with the test named ‘body weight’**bheig **=symbol associated with the test named ‘body height”

^=the operator used to calculate bheig to the power of 2

**Example 2: A complex formula that calculates VO2max from one mile walk/run**

**132.853-(0.1692*(bweig*2.2))-(0.3877*age)+(6.315*gender)-(3.2649*(mitime/60))-(0.1565*ehr)****bweig**=symbol associated with the test named ‘body weight’**age **=symbol associated with the age of the student (calculated dynamically using the date of birth)**gender**= symbol associated with the gender (male/female) of the student**mitime**= symbol associated with the test named ‘Mile Rockport Walk Test’; entered in min:sec, automatically converted in seconds when stored in the database and divided by 60 to be used as min in the formula;** _{ehr}**=exercise heart rate at the end of the walk/run

**Operators**-, *, + and / are also used.