# Difference between history tag timestamp

**URL:** <https://forum.inductiveautomation.com/t/difference-between-history-tag-timestamp/17201>\
**Category:** Ignition\
**Created:** [March 2, 2018, 4:54pm UTC](https://forum.inductiveautomation.com/t/difference-between-history-tag-timestamp/17201 "2018-03-02T16:54:47Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![bwagner](https://avatars.discourse-cdn.com/v4/letter/b/7feea3/32.png) [@bwagner](https://forum.inductiveautomation.com/u/bwagner)\
**Post date:** [March 2, 2018, 4:54pm UTC](https://forum.inductiveautomation.com/t/difference-between-history-tag-timestamp/17201/1 "2018-03-02T16:54:47Z")

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I have a Boolean tag that i am logging history on. I would like to graph or put in a table the elapsed time between the timestamps when it is true. any help would be appreciated.