# Want to add duration (in seconds) to timestamp
**URL:** https://discuss.elastic.co/t/want-to-add-duration-in-seconds-to-timestamp/125003
**Category:** Logstash
**Created:** [March 21, 2018, 2:29pm UTC](https://discuss.elastic.co/t/want-to-add-duration-in-seconds-to-timestamp/125003 "2018-03-21T14:29:10Z")
**Posts on this page:** 4
**Page:** 1
### Author:  [@MarBel78](https://discuss.elastic.co/u/MarBel78)
#### Post date: [March 21, 2018, 2:29pm UTC](https://discuss.elastic.co/t/want-to-add-duration-in-seconds-to-timestamp/125003/1 "2018-03-21T14:29:10Z")
Dear all,
i want to add a given durations (in seconds) to timestamp into a new field.
In the end, i have the start time (timestamp) and the end time.
What is the easiest way during import by logstash ?
Thanks a lot!
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### Author:  [@Badger](https://discuss.elastic.co/u/Badger)
#### Post date: [March 22, 2018, 1:50am UTC](https://discuss.elastic.co/t/want-to-add-duration-in-seconds-to-timestamp/125003/2 "2018-03-22T01:50:46Z")
If you have both the start time (timestamp) and end time in the same event then [this](https://discuss.elastic.co/t/time-difference-between-two-fields-in-a-csv-using-ruby-plugin/122115/2?u=badger) might help.
If you have the start time and end time in different events then an [aggregate filter](https://www.elastic.co/guide/en/logstash/current/plugins-filters-aggregate.html) might work for you.
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### Author:  [@MarBel78](https://discuss.elastic.co/u/MarBel78)
#### Post date: [March 22, 2018, 12:00pm UTC](https://discuss.elastic.co/t/want-to-add-duration-in-seconds-to-timestamp/125003/3 "2018-03-22T12:00:44Z")
I habe the start time and the duration (in seconds). Thanks.
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### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [April 19, 2018, 12:00pm UTC](https://discuss.elastic.co/t/want-to-add-duration-in-seconds-to-timestamp/125003/4 "2018-04-19T12:00:44Z")
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