diff --git a/src/modules/launcher/Plugins/Microsoft.PowerToys.Run.Plugin.Calculator/CalculateHelper.cs b/src/modules/launcher/Plugins/Microsoft.PowerToys.Run.Plugin.Calculator/CalculateHelper.cs
index a1ca64aead..e49e36814a 100644
--- a/src/modules/launcher/Plugins/Microsoft.PowerToys.Run.Plugin.Calculator/CalculateHelper.cs
+++ b/src/modules/launcher/Plugins/Microsoft.PowerToys.Run.Plugin.Calculator/CalculateHelper.cs
@@ -28,7 +28,8 @@ namespace Microsoft.PowerToys.Run.Plugin.Calculator
                 throw new ArgumentNullException(paramName: nameof(input));
             }
 
-            if (input.Length <= 2)
+            bool singleDigitFactorial = input.EndsWith("!", StringComparison.InvariantCulture);
+            if (input.Length <= 2 && !singleDigitFactorial)
             {
                 return false;
             }