# Visualize: JSON Input: how to use?

**URL:** <https://discuss.elastic.co/t/visualize-json-input-how-to-use/75513>\
**Category:** Kibana\
**Created:** [February 17, 2017, 2:44pm UTC](https://discuss.elastic.co/t/visualize-json-input-how-to-use/75513 "2017-02-17T14:44:16Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![asp](https://avatars.discourse-cdn.com/v4/letter/a/9fc348/32.png) [@asp](https://discuss.elastic.co/u/asp)\
**Post date:** [February 17, 2017, 2:44pm UTC](https://discuss.elastic.co/t/visualize-json-input-how-to-use/75513/1 "2017-02-17T14:44:16Z")

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Hi,

I am on kibana 5.1.2.  
I have some a field, which shows bytes, but I would like to convert it in an aggregation to MB.

I found out how to do it with scripted fields, but now my question is, can I do this with JSON Input too?

 ![](https://us1.discourse-cdn.com/elastic/original/2X/a/a54065b2a0e0e48c2bf1f5d6a9ed0605827eacf1.png)

What do I need to enter in the json part, if I want to calculate value/1024/1024 ?  
Do I need to enable scripting in elasticsearch? How?

thanks, Andreas

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<div class="post-metadata">

**Author:** ![shaunak](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/shaunak/32/6643_2.png) [@shaunak](https://discuss.elastic.co/u/shaunak)\
**Post date:** [February 18, 2017, 3:57am UTC](https://discuss.elastic.co/t/visualize-json-input-how-to-use/75513/2 "2017-02-18T03:57:47Z")

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Try this in the JSON input field:

```
{
  "script": {
    "inline": "doc['system.memory.used.bytes'].value / 1024 / 1024",
    "lang": "painless"
  }
}
```

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<div class="post-metadata">

**Author:** ![asp](https://avatars.discourse-cdn.com/v4/letter/a/9fc348/32.png) [@asp](https://discuss.elastic.co/u/asp)\
**Post date:** [February 20, 2017, 7:49am UTC](https://discuss.elastic.co/t/visualize-json-input-how-to-use/75513/3 "2017-02-20T07:49:59Z")

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great, it works. Thanks a lot.

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<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [March 20, 2017, 7:51am UTC](https://discuss.elastic.co/t/visualize-json-input-how-to-use/75513/4 "2017-03-20T07:51:08Z")

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