# Calculate filtered document's size

**URL:** <https://discuss.elastic.co/t/calculate-filtered-documents-size/251969>\
**Category:** Elasticsearch\
**Created:** [October 13, 2020, 8:44pm UTC](https://discuss.elastic.co/t/calculate-filtered-documents-size/251969 "2020-10-13T20:44:03Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![rschirin](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/rschirin/32/45283_2.png) [@rschirin](https://discuss.elastic.co/u/rschirin)\
**Post date:** [October 13, 2020, 8:44pm UTC](https://discuss.elastic.co/t/calculate-filtered-documents-size/251969/1 "2020-10-13T20:44:03Z")

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Hi all,  
Is there a way to calculate the amount of filtered documents size inside a specific index?  
I mean, in a daily log index I would like to know the index total size is divided.

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**Author:** ![rschirin](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/rschirin/32/45283_2.png) [@rschirin](https://discuss.elastic.co/u/rschirin)\
**Post date:** [October 16, 2020, 1:39pm UTC](https://discuss.elastic.co/t/calculate-filtered-documents-size/251969/2 "2020-10-16T13:39:25Z")

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I found the mapper-size plugin but I am not really sure it can help me.  
is there any tip?

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**Author:** ![dadoonet](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/dadoonet/32/137187_2.png) [@dadoonet](https://discuss.elastic.co/u/dadoonet)\
**Post date:** [October 20, 2020, 1:52pm UTC](https://discuss.elastic.co/t/calculate-filtered-documents-size/251969/3 "2020-10-20T13:52:11Z")

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That will give you a raw idea. It will actually give you the size of the `_source` field, which is your JSON content. Not exactly the size on disk took by the document.

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**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [November 17, 2020, 1:52pm UTC](https://discuss.elastic.co/t/calculate-filtered-documents-size/251969/4 "2020-11-17T13:52:11Z")

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