diff --git a/src/modules/cmdpal/ext/Microsoft.CmdPal.Ext.Calc/Helper/CalculateEngine.cs b/src/modules/cmdpal/ext/Microsoft.CmdPal.Ext.Calc/Helper/CalculateEngine.cs
index f5e35b05cb..2b375bfe3a 100644
--- a/src/modules/cmdpal/ext/Microsoft.CmdPal.Ext.Calc/Helper/CalculateEngine.cs
+++ b/src/modules/cmdpal/ext/Microsoft.CmdPal.Ext.Calc/Helper/CalculateEngine.cs
@@ -82,7 +82,7 @@ public static class CalculateEngine
             return default;
         }
 
-        var decimalResult = Convert.ToDecimal(result, cultureInfo);
+        var decimalResult = Convert.ToDecimal(result, new CultureInfo("en-US"));
 
         var roundedResult = FormatMax15Digits(decimalResult, cultureInfo);