# Calculation types
<a name="v9-panels-calculation-types"></a>

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This documentation topic is designed for Grafana workspaces that support **Grafana version 9.x**.  
For Grafana workspaces that support Grafana version 12.x, see [Working in Grafana version 12](using-grafana-v12.md).  
For Grafana workspaces that support Grafana version 10.x, see [Working in Grafana version 10](using-grafana-v10.md).  
For Grafana workspaces that support Grafana version 8.x, see [Working in Grafana version 8](using-grafana-v8.md).

 The following table contains a list of calculations you can perform in Grafana. You can find these calculations in the **Transform** tab and in the bar gauge, gauge, and stat visualizations. 


|  Calculation  |  Description  | 
| --- | --- | 
|  All nulls  |  True when all values are null  | 
|  All zeros  |  True when all values are 0  | 
|  Change count  |  Number of times the field’s value changes  | 
|  Count  |  Number of values in a field  | 
|  Delta  |  Cumulative change in value, only counts increments  | 
|  Difference  |  Difference between first and last value of a field  | 
|  Difference percent  |  Percentage change between first and last value of a field  | 
|  Distinct count  |  Number of unique values in a field  | 
|  First (not null)  |  First, not null value in a field  | 
|  Max  |  Maximum value of a field  | 
|  Mean  |  Mean value of all values in a field  | 
|  Variance  |  Variance of all values in a field  | 
|  StdDev  |  Standard deviation of all values in a field  | 
|  Min  |  Minimum value of a field  | 
|  Min (above zero)  |  Minimum, positive value of a field  | 
|  Range  |  Difference between maximum and minimum values of a field  | 
|  Step  |  Minimal interval between values of a field  | 
|  Total  |  Sum of all values in a field  |