# Cardinality Aggregation gives wrong number?

**URL:** <https://discuss.elastic.co/t/cardinality-aggregation-gives-wrong-number/167116>\
**Category:** Elasticsearch\
**Created:** [February 5, 2019, 12:15pm UTC](https://discuss.elastic.co/t/cardinality-aggregation-gives-wrong-number/167116 "2019-02-05T12:15:55Z")\
**Posts on this page:** 1\
**Showing post:** 3

<div class="post-metadata">

**Author:** ![Christian\_Dahlqvist](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/christian_dahlqvist/32/4617_2.png) [@Christian\_Dahlqvist](https://discuss.elastic.co/u/Christian_Dahlqvist)\
**Post date:** [February 5, 2019, 12:31pm UTC](https://discuss.elastic.co/t/cardinality-aggregation-gives-wrong-number/167116/3 "2019-02-05T12:31:24Z")

</div>

[This post](https://discuss.elastic.co/t/background-count-in-significant-terms-not-consistent/55824/8) contains a good discussion of why some type of aggregations in Elasticsearch are approximate.

---

_[View the full topic](https://discuss.elastic.co/t/cardinality-aggregation-gives-wrong-number/167116)._