# Format Tag Value

**URL:** <https://forum.inductiveautomation.com/t/format-tag-value/68850>\
**Category:** Ignition\
**Created:** [January 20, 2023, 2:23pm UTC](https://forum.inductiveautomation.com/t/format-tag-value/68850 "2023-01-20T14:23:34Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![majad](https://avatars.discourse-cdn.com/v4/letter/m/df788c/32.png) [@majad](https://forum.inductiveautomation.com/u/majad)\
**Post date:** [January 20, 2023, 2:23pm UTC](https://forum.inductiveautomation.com/t/format-tag-value/68850/1 "2023-01-20T14:23:34Z")

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Hello,

for my project i use opc Tags to get the values i want to monitor. These values got a lot of numbers after the decimal points. As i just need two numbers after the decimal points i wonder if it is possible to have just the two numbers in the tag value and therefore in the historical data of the tag.

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<div class="post-metadata">

**Author:** ![pturmel](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/pturmel/32/3295_2.png) [@pturmel](https://forum.inductiveautomation.com/u/pturmel)\
**Post date:** [January 20, 2023, 2:31pm UTC](https://forum.inductiveautomation.com/t/format-tag-value/68850/2 "2023-01-20T14:31:01Z")

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Floating point values tend to always have many digits, especially considering the fact that binary numbers have repeating bits after the point where true decimal numbers do not. It is a mistake to round for storage.

Tags have a format property that governs how many decimal places to **display** by default, and GUI components can use their own formats as needed.

If you really need storage rounded to a particular number of decimal digits, don't use the historian. Instead, use a Transaction Group (SQL Bridge Module) to record to a DB table where the columns use a decimal column type instead of floating point. (You can script the inserts to such a table, too, if you don't want to use the SQL Bridge module.)