Title: Product update: September 7, 2023
Author: staff
Published: September 7, 2023
Last modified: September 17, 2025

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#  Product update: September 7, 2023

### Conversion Rate Per Mille

We added a _per mille_ option to the conversion metric dropdown. This calculates
the rate per-mille (per 1000 parts) instead of the default percent (per 100 parts).
This can be used anywhere the conversion rate is also applied.

![](https://docs.parse.ly/wp-content/uploads/sites/5/2023/09/conversion-rate-per-
mille.png?w=695)

Last updated: September 17, 2025