Use this simple z score calculator to calculate both positive and negative z scores
Z-Score Calculator
Population Mean: | The mean (average value) of the population to which the unstandardized value belongs. | |
Population Standard Deviation: | The standard deviation of the population to which the unstandardized value belongs. | |
Value: | The unstandardized raw value for which you want to compute a Z-score | |
Z-Score: |
You can also find here a Z Score Table.