diff --git a/Flow.Launcher.Test/Plugins/CalculatorTest.cs b/Flow.Launcher.Test/Plugins/CalculatorTest.cs
index b075813dbb6..4e40d3645b0 100644
--- a/Flow.Launcher.Test/Plugins/CalculatorTest.cs
+++ b/Flow.Launcher.Test/Plugins/CalculatorTest.cs
@@ -16,14 +16,15 @@ public class CalculatorPluginTest
         {
             DecimalSeparator = DecimalSeparator.UseSystemLocale,
             MaxDecimalPlaces = 10,
-            ShowErrorMessage = false // Make sure we return the empty results when error occurs
+            ShowErrorMessage = false, // Make sure we return the empty results when error occurs
+            UseThousandsSeparator = true // Default value
         };
         private readonly Engine _engine = new(new Configuration
         {
             Scope = new Dictionary<string, object>
-                {
-                    { "e", Math.E }, // e is not contained in the default mages engine
-                }
+            {
+                { "e", Math.E }, // e is not contained in the default mages engine
+            }
         });
 
         public CalculatorPluginTest()
@@ -41,6 +42,44 @@ public CalculatorPluginTest()
             engineField.SetValue(null, _engine);
         }
 
+        [Test]
+        public void ThousandsSeparatorTest_Enabled()
+        {
+            _settings.UseThousandsSeparator = true;
+
+            _settings.DecimalSeparator = DecimalSeparator.Dot;
+            var result = GetCalculationResult("1000+234");
+            // When thousands separator is enabled, the result should contain a separator
+            // Since decimal separator is dot, thousands separator should be comma
+            ClassicAssert.AreEqual("1,234", result);
+
+            _settings.DecimalSeparator = DecimalSeparator.Comma;
+            var result2 = GetCalculationResult("1000+234");
+            // When thousands separator is enabled, the result should contain a separator
+            // Since decimal separator is comma, thousands separator should be dot
+            ClassicAssert.AreEqual("1.234", result2);
+        }
+
+        [Test]
+        public void ThousandsSeparatorTest_Disabled()
+        {
+            _settings.UseThousandsSeparator = false;
+            _settings.DecimalSeparator = DecimalSeparator.UseSystemLocale;
+
+            var result = GetCalculationResult("1000+234");
+            ClassicAssert.AreEqual("1234", result);
+        }
+
+        [Test]
+        public void ThousandsSeparatorTest_LargeNumber()
+        {
+            _settings.UseThousandsSeparator = false;
+            _settings.DecimalSeparator = DecimalSeparator.UseSystemLocale;
+
+            var result = GetCalculationResult("1000000+234567");
+            ClassicAssert.AreEqual("1234567", result);
+        }
+
         // Basic operations
         [TestCase(@"1+1", "2")]
         [TestCase(@"2-1", "1")]
@@ -77,6 +116,9 @@ public CalculatorPluginTest()
         [TestCase(@"invalid_expression", "")]
         public void CalculatorTest(string expression, string result)
         {
+            _settings.UseThousandsSeparator = false;
+            _settings.DecimalSeparator = DecimalSeparator.Dot;
+
             ClassicAssert.AreEqual(GetCalculationResult(expression), result);
         }
 
diff --git a/Plugins/Flow.Launcher.Plugin.Calculator/Languages/en.xaml b/Plugins/Flow.Launcher.Plugin.Calculator/Languages/en.xaml
index b12972b1b84..5f9a3ca5a6c 100644
--- a/Plugins/Flow.Launcher.Plugin.Calculator/Languages/en.xaml
+++ b/Plugins/Flow.Launcher.Plugin.Calculator/Languages/en.xaml
@@ -14,6 +14,7 @@
     <system:String x:Key="flowlauncher_plugin_calculator_decimal_separator_comma">Comma (,)</system:String>
     <system:String x:Key="flowlauncher_plugin_calculator_decimal_separator_dot">Dot (.)</system:String>
     <system:String x:Key="flowlauncher_plugin_calculator_max_decimal_places">Max. decimal places</system:String>
+    <system:String x:Key="flowlauncher_plugin_calculator_use_thousands_separator">Show thousands separator in results</system:String>
     <system:String x:Key="flowlauncher_plugin_calculator_failed_to_copy">Copy failed, please try later</system:String>
     <system:String x:Key="flowlauncher_plugin_calculator_show_error_message">Show error message when calculation fails</system:String>
 </ResourceDictionary>
\ No newline at end of file
diff --git a/Plugins/Flow.Launcher.Plugin.Calculator/Main.cs b/Plugins/Flow.Launcher.Plugin.Calculator/Main.cs
index a20a1ad5dbb..1b9a38e1819 100644
--- a/Plugins/Flow.Launcher.Plugin.Calculator/Main.cs
+++ b/Plugins/Flow.Launcher.Plugin.Calculator/Main.cs
@@ -363,7 +363,7 @@ private string FormatResult(decimal roundedResult)
             string integerPart = parts[0];
             string fractionalPart = parts.Length > 1 ? parts[1] : string.Empty;
 
-            if (integerPart.Length > 3)
+            if (_settings.UseThousandsSeparator && integerPart.Length > 3)
             {
                 integerPart = ThousandGroupRegex.Replace(integerPart, groupSeparator);
             }
diff --git a/Plugins/Flow.Launcher.Plugin.Calculator/Settings.cs b/Plugins/Flow.Launcher.Plugin.Calculator/Settings.cs
index 1544dc41fba..69cd17ed2da 100644
--- a/Plugins/Flow.Launcher.Plugin.Calculator/Settings.cs
+++ b/Plugins/Flow.Launcher.Plugin.Calculator/Settings.cs
@@ -7,4 +7,6 @@ public class Settings
     public int MaxDecimalPlaces { get; set; } = 10;
 
     public bool ShowErrorMessage { get; set; } = false;
+
+    public bool UseThousandsSeparator { get; set; } = true;
 }
diff --git a/Plugins/Flow.Launcher.Plugin.Calculator/Views/CalculatorSettings.xaml b/Plugins/Flow.Launcher.Plugin.Calculator/Views/CalculatorSettings.xaml
index 9e7549b2df1..82f8eec60f3 100644
--- a/Plugins/Flow.Launcher.Plugin.Calculator/Views/CalculatorSettings.xaml
+++ b/Plugins/Flow.Launcher.Plugin.Calculator/Views/CalculatorSettings.xaml
@@ -16,6 +16,7 @@
             <RowDefinition Height="auto" />
             <RowDefinition Height="auto" />
             <RowDefinition Height="auto" />
+            <RowDefinition Height="auto" />
         </Grid.RowDefinitions>
         <Grid.ColumnDefinitions>
             <ColumnDefinition Width="Auto" />
@@ -66,6 +67,16 @@
             Margin="{StaticResource SettingPanelItemTopBottomMargin}"
             HorizontalAlignment="Left"
             VerticalAlignment="Center"
+            Content="{DynamicResource flowlauncher_plugin_calculator_use_thousands_separator}"
+            IsChecked="{Binding Settings.UseThousandsSeparator, Mode=TwoWay}" />
+
+        <CheckBox
+            Grid.Row="3"
+            Grid.Column="0"
+            Grid.ColumnSpan="2"
+            Margin="{StaticResource SettingPanelItemTopBottomMargin}"
+            HorizontalAlignment="Left"
+            VerticalAlignment="Center"
             Content="{DynamicResource flowlauncher_plugin_calculator_show_error_message}"
             IsChecked="{Binding Settings.ShowErrorMessage, Mode=TwoWay}" />
     </Grid>