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url: /v6.2/en-us/shift.md
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# Mobile Calculation

Mobile calculation involves calculating data within a specified range according to the calculation type. It can only be performed when the date is used as a dimension, and the calculation method for the date dimension must be: milliseconds, seconds, minutes, hours, days, weeks, months, quarters, or years. If the calculation method for the date dimension is: days (across weeks), days (across months), months (across years), or quarters (across years), the measure cannot be subjected to mobile calculation.
![](/images/chart/calculation/shift-001.png)

Mobile calculation is similar to cumulative calculation, with the difference being: "cumulative calculation" targets a fixed period, while "mobile calculation" targets a moving period, such as from the previous month to the next month.
![](/images/chart/calculation/shift-002.png)