diff --git a/framework/i18n/Formatter.php b/framework/i18n/Formatter.php
index 7e5cb1d070..37c82377c4 100644
--- a/framework/i18n/Formatter.php
+++ b/framework/i18n/Formatter.php
@@ -1188,7 +1188,7 @@ class Formatter extends Component
     private function formatSizeNumber($value, $decimals, $options, $textOptions)
     {
         if (is_string($value) && is_numeric($value)) {
-            $value = (int) $value;
+            $value = (float) $value;
         }
         if (!is_numeric($value)) {
             throw new InvalidParamException("'$value' is not a numeric value.");