diff --git a/doc/31-Changelog.md b/doc/31-Changelog.md
index 2acbc61..dfb81a5 100644
--- a/doc/31-Changelog.md
+++ b/doc/31-Changelog.md
@@ -12,6 +12,7 @@ Released closed milestones can be found on [GitHub](https://github.com/Icinga/ic
 [Issue and PRs](https://github.com/Icinga/icinga-powershell-framework/milestone/7?closed=1)
 
 * [#78](https://github.com/Icinga/icinga-powershell-framework/issues/78) Fix Icinga Agent package fetching for x86 architecture
+* [#79](https://github.com/Icinga/icinga-powershell-framework/issues/79) Fix ConvertTo-Seconds to output valid numeric data with multiple digits
 
 ## 1.1.2 (2020-07-01)
 
diff --git a/lib/core/tools/ConvertTo-Seconds.psm1 b/lib/core/tools/ConvertTo-Seconds.psm1
index 6472e51..59bd7aa 100644
--- a/lib/core/tools/ConvertTo-Seconds.psm1
+++ b/lib/core/tools/ConvertTo-Seconds.psm1
@@ -57,13 +57,13 @@ function ConvertTo-Seconds()
     }
 
     [single]$ValueSplitted = $NumberPart;
-    $result             = 0;
+    $result                = 0;
 
     if ($Negate) {
-        $ValueSplitted *= -1;
+        $ValueSplitted    *= -1;
     }
 
-    [string]$errorMsg   = (
+    [string]$errorMsg = (
         [string]::Format('Invalid unit type "{0}" specified for convertion. Allowed units: ms, s, m, h, d, w, M, y', $UnitPart)
     );
 
@@ -105,7 +105,13 @@ function ConvertTo-SecondsFromIcingaThresholds()
         $NewContent += (Get-IcingaThresholdsAsSeconds -Value $entry)
     }
 
-    return [string]::Join(':', $NewContent);
+    [string]$Value = [string]::Join(':', $NewContent);
+
+    if ($Value.Contains(':') -eq $FALSE) {
+        return [convert]::ToDouble($Value);
+    }
+
+    return $Value;
 }
 
 function Get-IcingaThresholdsAsSeconds()