diff --git a/src/CalcManager/CEngine/scicomm.cpp b/src/CalcManager/CEngine/scicomm.cpp
index 701fb21c8..45124aa2d 100644
--- a/src/CalcManager/CEngine/scicomm.cpp
+++ b/src/CalcManager/CEngine/scicomm.cpp
@@ -780,6 +780,11 @@ void CCalcEngine::ProcessCommandWorker(OpCode wParam)
         DisplayNum();
         break;
 
+    case IDC_ENG:
+        m_nFE = NumberFormat::Engineering;
+        DisplayNum();
+        break;
+
     case IDC_EXP:
         if (m_bRecord && !m_fIntegerMode && m_input.TryBeginExponent())
         {
diff --git a/src/CalcManager/Command.h b/src/CalcManager/Command.h
index 8d27dc799..c6f2b46c8 100644
--- a/src/CalcManager/Command.h
+++ b/src/CalcManager/Command.h
@@ -66,6 +66,7 @@ namespace CalculationManager
         CommandGRAD = 323,
         CommandDegrees = 324,
         CommandHYP = 325,
+        CommandENG = 326,
 
         CommandNULL = 0,
 
diff --git a/src/CalcManager/Header Files/CCommand.h b/src/CalcManager/Header Files/CCommand.h
index 2696181a5..a56c77577 100644
--- a/src/CalcManager/Header Files/CCommand.h	
+++ b/src/CalcManager/Header Files/CCommand.h	
@@ -29,6 +29,7 @@
 #define IDM_RAD 322
 #define IDM_GRAD 323
 #define IDM_DEGREES 324
+#define IDC_ENG 326
 
 #define IDC_HEX IDM_HEX
 #define IDC_DEC IDM_DEC
diff --git a/src/CalcManager/Ratpack/conv.cpp b/src/CalcManager/Ratpack/conv.cpp
index 4f7609de0..893da9318 100644
--- a/src/CalcManager/Ratpack/conv.cpp
+++ b/src/CalcManager/Ratpack/conv.cpp
@@ -1171,7 +1171,7 @@ wstring NumberToString(_Inout_ PNUMBER& pnum, NumberFormat format, uint32_t radi
         {
             if (format == NumberFormat::Engineering)
             {
-                exponent = (eout % 3);
+                exponent = (3 + (eout % 3)) % 3;
                 eout -= exponent;
                 exponent++;
 
diff --git a/src/CalcViewModel/Common/CalculatorButtonUser.h b/src/CalcViewModel/Common/CalculatorButtonUser.h
index 4885e4887..1c64eac64 100644
--- a/src/CalcViewModel/Common/CalculatorButtonUser.h
+++ b/src/CalcViewModel/Common/CalculatorButtonUser.h
@@ -38,6 +38,7 @@ namespace CalculatorApp::ViewModel::Common
         Radians = (int)CM::Command::CommandRAD,
         Grads = (int)CM::Command::CommandGRAD,
         Degrees = (int)CM::Command::CommandDegrees,
+        Engineering = (int)CM::Command::CommandENG,
         OpenParenthesis = (int)CM::Command::CommandOPENP,
         CloseParenthesis = (int)CM::Command::CommandCLOSEP,
         Pi = (int)CM::Command::CommandPI,
diff --git a/src/CalcViewModel/StandardCalculatorViewModel.cpp b/src/CalcViewModel/StandardCalculatorViewModel.cpp
index 22554ca65..736497bdf 100644
--- a/src/CalcViewModel/StandardCalculatorViewModel.cpp
+++ b/src/CalcViewModel/StandardCalculatorViewModel.cpp
@@ -448,6 +448,12 @@ void StandardCalculatorViewModel::FtoEButtonToggled()
     OnButtonPressed(NumbersAndOperatorsEnum::FToE);
 }
 
+void StandardCalculatorViewModel::EngButton()
+{
+    OnButtonPressed(NumbersAndOperatorsEnum::Engineering);
+}
+
+
 void StandardCalculatorViewModel::HandleUpdatedOperandData(Command cmdenum)
 {
     DisplayExpressionToken ^ displayExpressionToken = ExpressionTokens->GetAt(m_TokenPosition);
diff --git a/src/CalcViewModel/StandardCalculatorViewModel.h b/src/CalcViewModel/StandardCalculatorViewModel.h
index 0af82478e..187b2bf23 100644
--- a/src/CalcViewModel/StandardCalculatorViewModel.h
+++ b/src/CalcViewModel/StandardCalculatorViewModel.h
@@ -258,6 +258,7 @@ namespace CalculatorApp
             void SetOpenParenthesisCountNarratorAnnouncement();
             void SwitchAngleType(CalculatorApp::ViewModel::Common::NumbersAndOperatorsEnum num);
             void FtoEButtonToggled();
+            void EngButton();
 
         internal:
             void OnPaste(Platform::String ^ pastedString);
diff --git a/src/Calculator/Views/CalculatorScientificAngleButtons.xaml b/src/Calculator/Views/CalculatorScientificAngleButtons.xaml
index ca30815cc..ba3fe1ec4 100644
--- a/src/Calculator/Views/CalculatorScientificAngleButtons.xaml
+++ b/src/Calculator/Views/CalculatorScientificAngleButtons.xaml
@@ -98,21 +98,32 @@
                 CommandParameter="2"
                 Content="GRAD"
                 Visibility="Collapsed"/>
-        <ToggleButton x:Name="FtoeButton"
-                      Grid.Column="1"
-                      Style="{StaticResource CaptionToggleButtonWithIndicatorStyle}"
-                      Background="{ThemeResource SystemControlBackgroundTransparentBrush}"
-                      common:KeyboardShortcutManager.VirtualKey="{utils:ResourceVirtualKey Name=ftoeButton/[using:CalculatorApp.Common]KeyboardShortcutManager/VirtualKey}"
-                      AutomationProperties.AutomationId="ftoeButton"
-                      AutomationProperties.Name="{utils:ResourceString Name=ftoeButton/[using:Windows.UI.Xaml.Automation]AutomationProperties/Name}"
-                      Checked="FToEButton_Toggled"
-                      Content="F-E"
-                      IsChecked="{x:Bind Model.IsFToEChecked, Mode=OneWay}"
-                      Unchecked="FToEButton_Toggled"
-                      IsEnabled="{x:Bind Model.IsFToEEnabled, Mode=OneWay}">
-            <ToggleButton.CommandParameter>
-                <local:NumbersAndOperatorsEnum>FToE</local:NumbersAndOperatorsEnum>
-            </ToggleButton.CommandParameter>
-        </ToggleButton>
+
+        <Button x:Name="AutoButton"
+                x:Uid="AutoButton"
+                Grid.Column="1"
+                Style="{StaticResource CaptionButtonSmallStyle}"
+                AutomationProperties.AutomationId="autoButton"
+                Command="{x:Bind NotationPressed}"
+                CommandParameter="0"
+                Content="AUTO"/>
+        <Button x:Name="SciButton"
+                x:Uid="SciButton"
+                Grid.Column="1"
+                Style="{StaticResource CaptionButtonSmallStyle}"
+                AutomationProperties.AutomationId="sciButton"
+                Command="{x:Bind NotationPressed}"
+                CommandParameter="1"
+                Content="SCI"
+                Visibility="Collapsed"/>
+        <Button x:Name="EngButton"
+                x:Uid="EngButton"
+                Grid.Column="1"
+                Style="{StaticResource CaptionButtonSmallStyle}"
+                AutomationProperties.AutomationId="engButton"
+                Command="{x:Bind NotationPressed}"
+                CommandParameter="2"
+                Content="ENG"
+                Visibility="Collapsed"/>
     </Grid>
 </UserControl>
diff --git a/src/Calculator/Views/CalculatorScientificAngleButtons.xaml.cs b/src/Calculator/Views/CalculatorScientificAngleButtons.xaml.cs
index 464c9ce89..2ea4b4c67 100644
--- a/src/Calculator/Views/CalculatorScientificAngleButtons.xaml.cs
+++ b/src/Calculator/Views/CalculatorScientificAngleButtons.xaml.cs
@@ -17,10 +17,10 @@ namespace CalculatorApp
     [Windows.Foundation.Metadata.WebHostHidden]
     public sealed partial class CalculatorScientificAngleButtons
     {
-        public CalculatorScientificAngleButtons()
+        public CalculatorScientificAngleButtons()       
         {
             m_isErrorVisualState = false;
-            InitializeComponent();
+            InitializeComponent();                      
         }
 
         public StandardCalculatorViewModel Model => (StandardCalculatorViewModel)this.DataContext;
@@ -84,10 +84,49 @@ private void OnAngleButtonPressed(object commandParameter)
             }
         }
 
-        private void FToEButton_Toggled(object sender, RoutedEventArgs e)
+        public System.Windows.Input.ICommand NotationPressed
         {
-            var viewModel = (StandardCalculatorViewModel)this.DataContext;
-            viewModel.FtoEButtonToggled();
+            get
+            {
+                if (donotuse_NotationPressed == null)
+                {
+                    donotuse_NotationPressed = DelegateCommandUtils.MakeDelegateCommand(this,
+                        (that, param) =>
+                        {
+                            that.OnNotationButtonPressed(param);
+                        });
+                }
+                return donotuse_NotationPressed;
+            }
+        }
+        private System.Windows.Input.ICommand donotuse_NotationPressed;
+
+        private void OnNotationButtonPressed(object commandParameter)
+        {
+            string buttonId = (string)commandParameter;
+
+            AutoButton.Visibility = Visibility.Collapsed;
+            SciButton.Visibility = Visibility.Collapsed;
+            EngButton.Visibility = Visibility.Collapsed;
+
+            if (buttonId == "0")
+            {
+                Model.FtoEButtonToggled();
+                SciButton.Visibility = Visibility.Visible;
+                SciButton.Focus(FocusState.Programmatic);
+            }
+            else if (buttonId == "1")
+            {
+                Model.EngButton();
+                EngButton.Visibility = Visibility.Visible;
+                EngButton.Focus(FocusState.Programmatic);
+            }
+            else if (buttonId == "2")
+            {
+                Model.FtoEButtonToggled();
+                AutoButton.Visibility = Visibility.Visible;
+                AutoButton.Focus(FocusState.Programmatic);
+            }
         }
 
         private bool m_isErrorVisualState;
diff --git a/src/CalculatorUITestFramework/ScientificOperatorsPanel.cs b/src/CalculatorUITestFramework/ScientificOperatorsPanel.cs
index 22154f4f7..e514ec16c 100644
--- a/src/CalculatorUITestFramework/ScientificOperatorsPanel.cs
+++ b/src/CalculatorUITestFramework/ScientificOperatorsPanel.cs
@@ -17,8 +17,9 @@ public enum AngleOperatorState
 
     public enum FEButtonState
     {
-        Normal,
-        Exponential
+        Auto,
+        Scientific,
+        Engineering
     }
 
     /// <summary>
@@ -78,11 +79,14 @@ public class ScientificOperatorsPanel
         public WindowsElement RandButton => this.session.TryFindElementByAccessibilityId("randButton");
         public WindowsElement DmsButton => this.session.TryFindElementByAccessibilityId("dmsButton");
         public WindowsElement DegreesButton => this.session.TryFindElementByAccessibilityId("degreesButton");
-        public WindowsElement FixedToExponentialButton => this.session.TryFindElementByAccessibilityId("ftoeButton");
+        public WindowsElement AutoButton => this.session.TryFindElementByAccessibilityId("autoButton");
+        public WindowsElement SciButton => this.session.TryFindElementByAccessibilityId("sciButton");
+        public WindowsElement EngButton => this.session.TryFindElementByAccessibilityId("engButton");
         public WindowsElement NegateButton => this.session.TryFindElementByAccessibilityId("negateButton");
         public WindowsElement ShiftButton => this.session.TryFindElementByAccessibilityId("shiftButton");
         public WindowsElement TrigFlyout => this.session.TryFindElementByAccessibilityId("Trigflyout");
         public WindowsElement LightDismiss => this.session.TryFindElementByAccessibilityId("Light Dismiss");
+        private WindowsElement AutoSciEngButton => GetNumberFormatButton();
         private WindowsElement DegRadGradButton => GetAngleOperatorButton();
         private WindowsElement GetAngleOperatorButton()
         {
@@ -103,6 +107,25 @@ private WindowsElement GetAngleOperatorButton()
             throw new NotFoundException("Could not find deg, rad or grad button in page source");
         }
 
+        private WindowsElement GetNumberFormatButton()
+        {
+            string source = this.session.PageSource;
+            if (source.Contains("autoButton"))
+            {
+                return AutoButton;
+            }
+            else if (source.Contains("sciButton"))
+            {
+                return SciButton;
+            }
+            else if (source.Contains("engButton"))
+            {
+                return EngButton;
+            }
+
+            throw new NotFoundException("Could not find auto, sci, or eng button in page source");
+        }
+
         /// <summary>
         /// Set the state of the degrees, radians and gradians buttons.
         /// </summary>
@@ -122,11 +145,19 @@ public void SetAngleOperator(AngleOperatorState value)
             }
         }
 
-        public void ResetFEButton(FEButtonState value)
+        public void SetNumberFormat(FEButtonState value)
         {
-            if (this.FixedToExponentialButton.GetAttribute("Toggle.ToggleState") != "0")
+            //set the desired string value for the button
+            string desiredId = value switch
+            {
+                FEButtonState.Auto => "autoButton",
+                FEButtonState.Scientific => "sciButton",
+                FEButtonState.Engineering => "engButton",
+                _ => throw new NotImplementedException()
+            };
+            while (this.AutoSciEngButton.GetAttribute("AutomationId") != desiredId)
             {
-                FixedToExponentialButton.Click();
+                this.AutoSciEngButton.Click();
             }
         }
 
diff --git a/src/CalculatorUITests/CurrencyConverterFunctionalTests.cs b/src/CalculatorUITests/CurrencyConverterFunctionalTests.cs
index e1d8cc419..5c2724fce 100644
--- a/src/CalculatorUITests/CurrencyConverterFunctionalTests.cs
+++ b/src/CalculatorUITests/CurrencyConverterFunctionalTests.cs
@@ -3,6 +3,7 @@
 using CalculatorUITestFramework;
 
 using Microsoft.VisualStudio.TestTools.UnitTesting;
+using System;
 
 namespace CalculatorUITests
 {
diff --git a/src/CalculatorUITests/ScientificModeFunctionalTests.cs b/src/CalculatorUITests/ScientificModeFunctionalTests.cs
index 21e43f0b3..b377c9381 100644
--- a/src/CalculatorUITests/ScientificModeFunctionalTests.cs
+++ b/src/CalculatorUITests/ScientificModeFunctionalTests.cs
@@ -51,7 +51,7 @@ public void TestInit()
             }
             CalculatorApp.EnsureCalculatorHasFocus();
             page.ScientificOperators.SetAngleOperator(AngleOperatorState.Degrees);
-            page.ScientificOperators.ResetFEButton(FEButtonState.Normal);
+            page.ScientificOperators.SetNumberFormat(FEButtonState.Auto);
         }
 
         [TestCleanup]
@@ -161,11 +161,22 @@ public void SmokeTest_GradianAngleOperator()
 
         [TestMethod]
         [Priority(0)]
-        public void SmokeTest_FixedToExponential()
+        public void SmokeTest_ScientificFormat()
         {
-            page.ScientificOperators.FixedToExponentialButton.Click();
+            page.ScientificOperators.SetNumberFormat(FEButtonState.Scientific);
+            page.StandardOperators.NumberPad.Input(0.123);
             page.StandardOperators.EqualButton.Click();
-            Assert.AreEqual("0.e+0", page.CalculatorResults.GetCalculatorResultText());
+            Assert.AreEqual("1.23e-1", page.CalculatorResults.GetCalculatorResultText());
+        }
+
+        [TestMethod]
+        [Priority(0)]
+        public void SmokeTest_EngineeringFormat()
+        {
+            page.ScientificOperators.SetNumberFormat(FEButtonState.Engineering);
+            page.StandardOperators.NumberPad.Input(0.123);
+            page.StandardOperators.EqualButton.Click();
+            Assert.AreEqual("123.e-3", page.CalculatorResults.GetCalculatorResultText());
         }
         #endregion