# Convert/cast string/term to float/double in Kibana Visualization

**URL:** <https://discuss.elastic.co/t/convert-cast-string-term-to-float-double-in-kibana-visualization/191000>\
**Category:** Kibana\
**Created:** [July 17, 2019, 1:15pm UTC](https://discuss.elastic.co/t/convert-cast-string-term-to-float-double-in-kibana-visualization/191000 "2019-07-17T13:15:58Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![6tUBp3gwd9Zp](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/6tubp3gwd9zp/32/45240_2.png) [@6tUBp3gwd9Zp](https://discuss.elastic.co/u/6tUBp3gwd9Zp)\
**Post date:** [July 17, 2019, 1:15pm UTC](https://discuss.elastic.co/t/convert-cast-string-term-to-float-double-in-kibana-visualization/191000/1 "2019-07-17T13:15:59Z")

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I want to convert string to float within a Kibana visualization (as the title already indicates). I found [this](https://stackoverflow.com/questions/30706361/convert-strings-to-floats-at-aggregation-time) answer on Stackoverflow. Unfortunately it doesn't work for me. How could I get this to work? (I can not change the variable type itself)

 ![stringzufloat](https://us1.discourse-cdn.com/elastic/original/3X/f/f/ff7ab6ceeae87e71a5b821e1e5612d4b2f7d9de3.png)

(green is just some random float variable since I need it for the average aggregation, blue is the string variable that I want to convert to a float value, yellow is just a time field)

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**Author:** ![lukas](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/lukas/32/6812_2.png) [@lukas](https://discuss.elastic.co/u/lukas)\
**Post date:** [July 17, 2019, 11:57pm UTC](https://discuss.elastic.co/t/convert-cast-string-term-to-float-double-in-kibana-visualization/191000/2 "2019-07-17T23:57:39Z")

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Could you use a scripted field instead of using the advanced json input?

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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:** [August 14, 2019, 11:57pm UTC](https://discuss.elastic.co/t/convert-cast-string-term-to-float-double-in-kibana-visualization/191000/3 "2019-08-14T23:57:41Z")

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