# Add a time field in elasticsearch and calculate time between two event
**URL:** https://discuss.elastic.co/t/add-a-time-field-in-elasticsearch-and-calculate-time-between-two-event/305536
**Category:** Elasticsearch
**Tags:** docker
**Created:** [May 24, 2022, 6:25pm UTC](https://discuss.elastic.co/t/add-a-time-field-in-elasticsearch-and-calculate-time-between-two-event/305536 "2022-05-24T18:25:31Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@The-morpho](https://discuss.elastic.co/u/The-morpho)
#### Post date: [May 24, 2022, 6:25pm UTC](https://discuss.elastic.co/t/add-a-time-field-in-elasticsearch-and-calculate-time-between-two-event/305536/1 "2022-05-24T18:25:31Z")
I'm new to elasticsearch.
I’m working with log files stored in Elasticsearch, that contains information about some operations on differents levels, I have a field timestamp that represents the time when each operation has occured on each step.
I want to calculate the time between the start and the end of the process. **between step1 and step 3** and add it to a field that I will create so I can visualize it on Kibana.
This is an exemple of some of my logs.
> {“log\_level”:“INFO”,“timestamp”:“2021-12-22T11:49:06.124890Z”,“event\_type”:“step1”,“mid”:“96712abc”}{“log\_level”:“INFO”,“timestamp”:“2021-12-22T11:49:07.124890Z”,“event\_type”:“step2”,“mid”:“96712abc”} {“log\_level”:“INFO”,“timestamp”:“2021-12-22T11:49:08.124890Z”,“event\_type”:“step3”,“mid”:“96712abc”}
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### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [June 21, 2022, 6:25pm UTC](https://discuss.elastic.co/t/add-a-time-field-in-elasticsearch-and-calculate-time-between-two-event/305536/2 "2022-06-21T18:25:51Z")
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