# Timelion calculation
**URL:** https://discuss.elastic.co/t/timelion-calculation/180678
**Category:** Kibana
**Tags:** timelion
**Created:** [May 11, 2019, 11:38pm UTC](https://discuss.elastic.co/t/timelion-calculation/180678 "2019-05-11T23:38:58Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@punppis](https://discuss.elastic.co/u/punppis)
#### Post date: [May 11, 2019, 11:38pm UTC](https://discuss.elastic.co/t/timelion-calculation/180678/1 "2019-05-11T23:38:58Z")
{ created: ..., retention: ["day1", "day3"] }
how to calculate retention percentage for each keyword in retention?
day1 retention = users with "day1" / total user count for that day ('created')
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### Author:  [@thomasneirynck](https://discuss.elastic.co/u/thomasneirynck)
#### Post date: [May 13, 2019, 7:11pm UTC](https://discuss.elastic.co/t/timelion-calculation/180678/2 "2019-05-13T19:11:37Z")
hi @punppis,
a little more information is probably needed for this.
but you might want to start with the timelion tutorial first, and see if there's any information there that can help there: [https://www.elastic.co/guide/en/kibana/current/timelion.html](https://www.elastic.co/guide/en/kibana/current/timelion.html)
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### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [June 10, 2019, 7:11pm UTC](https://discuss.elastic.co/t/timelion-calculation/180678/3 "2019-06-10T19:11:46Z")
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