diff --git a/docs/sources/dashboards/variables/add-template-variables/index.md b/docs/sources/dashboards/variables/add-template-variables/index.md
index bd1dd81bf68..a0a45805d29 100644
--- a/docs/sources/dashboards/variables/add-template-variables/index.md
+++ b/docs/sources/dashboards/variables/add-template-variables/index.md
@@ -1,4 +1,4 @@
----
+****---
 aliases:
   - ../../reference/templating/
   - ../../variables/add-ad-hoc-filters/
@@ -314,6 +314,10 @@ Currently only supported for Prometheus and Loki data sources. This variable rep
 
 Currently only supported for Prometheus data sources. The `$__rate_interval` variable is meant to be used in the rate function. Refer to [Prometheus query variables]({{< relref "../../../datasources/prometheus/template-variables#use-__rate_interval" >}}) for details.
 
+### $\_\_rate_interval_ms
+
+This variable is the `$__rate_interval` variable in milliseconds, not a time interval formatted string. For example, if the `$__rate_interval` is `20m` then the `$__rate_interval_ms` is `1200000`.
+
 ### $timeFilter or $\_\_timeFilter
 
 The `$timeFilter` variable returns the currently selected time range as an expression. For example, the time range interval `Last 7 days` expression is `time > now() - 7d`.