diff --git a/quickstep/src/com/android/launcher3/uioverrides/states/OverviewState.java b/quickstep/src/com/android/launcher3/uioverrides/states/OverviewState.java
index 699ce97..5f62749 100644
--- a/quickstep/src/com/android/launcher3/uioverrides/states/OverviewState.java
+++ b/quickstep/src/com/android/launcher3/uioverrides/states/OverviewState.java
@@ -66,9 +66,9 @@
     @Override
     public ScaleAndTranslation getWorkspaceScaleAndTranslation(Launcher launcher) {
         RecentsView recentsView = launcher.getOverviewPanel();
-        float workspacePageWidth = launcher.getDeviceProfile().getWorkspaceWidth();
+        float workspacePageHeight = launcher.getDeviceProfile().getCellLayoutHeight();
         recentsView.getTaskSize(sTempRect);
-        float scale = (float) sTempRect.width() / workspacePageWidth;
+        float scale = (float) sTempRect.height() / workspacePageHeight;
         float parallaxFactor = 0.5f;
         return new ScaleAndTranslation(scale, 0, -getDefaultSwipeHeight(launcher) * parallaxFactor);
     }
diff --git a/src/com/android/launcher3/DeviceProfile.java b/src/com/android/launcher3/DeviceProfile.java
index 88030ae..561f9b9 100644
--- a/src/com/android/launcher3/DeviceProfile.java
+++ b/src/com/android/launcher3/DeviceProfile.java
@@ -501,7 +501,7 @@
      */
     private int calculateQsbWidth() {
         if (isQsbInline) {
-            int columns = isTwoPanels ? inv.numColumns * 2 : inv.numColumns;
+            int columns = getPanelCount() * inv.numColumns;
             return getIconToIconWidthForColumns(columns)
                     - iconSizePx * numShownHotseatIcons
                     - hotseatBorderSpace * numShownHotseatIcons;
@@ -665,11 +665,10 @@
         updateIconSize(1f, res);
 
         updateWorkspacePadding();
-        Point workspacePadding = getTotalWorkspacePadding();
 
         // Check to see if the icons fit within the available height.
         float usedHeight = getCellLayoutHeightSpecification();
-        final int maxHeight = getWorkspaceHeight(workspacePadding);
+        final int maxHeight = getCellLayoutHeight();
         float extraHeight = Math.max(0, maxHeight - usedHeight);
         float scaleY = maxHeight / usedHeight;
         boolean shouldScale = scaleY < 1f;
@@ -702,7 +701,7 @@
     }
 
     private int getCellLayoutWidthSpecification() {
-        int numColumns = isTwoPanels ? inv.numColumns * 2 : inv.numColumns;
+        int numColumns = getPanelCount() * inv.numColumns;
         return (cellWidthPx * numColumns) + (cellLayoutBorderSpacePx.x * (numColumns - 1))
                 + cellLayoutPaddingPx.left + cellLayoutPaddingPx.right;
     }
@@ -902,19 +901,21 @@
             result = new Point();
         }
 
-        // Since we are only concerned with the overall padding, layout direction does
-        // not matter.
-        Point padding = getTotalWorkspacePadding();
-
-        int numColumns = isTwoPanels ? inv.numColumns * 2 : inv.numColumns;
-        int screenWidthPx = getWorkspaceWidth(padding);
-        result.x = calculateCellWidth(screenWidthPx, cellLayoutBorderSpacePx.x, numColumns);
-        int screenHeightPx = getWorkspaceHeight(padding);
-        result.y = calculateCellHeight(screenHeightPx, cellLayoutBorderSpacePx.y, inv.numRows);
+        result.x = calculateCellWidth(getShortcutAndWidgetContainerWidth(),
+                cellLayoutBorderSpacePx.x, inv.numColumns);
+        result.y = calculateCellHeight(getShortcutAndWidgetContainerHeight(),
+                cellLayoutBorderSpacePx.y, inv.numRows);
         return result;
     }
 
     /**
+     * Gets the number of panels within the workspace.
+     */
+    public int getPanelCount() {
+        return isTwoPanels ? 2 : 1;
+    }
+
+    /**
      * Gets the space in px from the bottom of last item in the vertical-bar hotseat to the
      * bottom of the screen.
      */
@@ -932,7 +933,7 @@
     /**
      * Gets the scaled top of the workspace in px for the spring-loaded edit state.
      */
-    public float getWorkspaceSpringLoadShrunkTop() {
+    public float getCellLayoutSpringLoadShrunkTop() {
         workspaceSpringLoadShrunkTop = mInsets.top + dropTargetBarTopMarginPx + dropTargetBarSizePx
                 + dropTargetBarBottomMarginPx;
         return workspaceSpringLoadShrunkTop;
@@ -941,7 +942,7 @@
     /**
      * Gets the scaled bottom of the workspace in px for the spring-loaded edit state.
      */
-    private float getWorkspaceSpringLoadShrunkBottom() {
+    private float getCellLayoutSpringLoadShrunkBottom() {
         int topOfHotseat = hotseatBarSizePx + springLoadedHotseatBarTopMarginPx;
         workspaceSpringLoadShrunkBottom =
                 heightPx - (isVerticalBarLayout() ? getVerticalHotseatLastItemBottomOffset()
@@ -960,9 +961,8 @@
      * Gets the scale of the workspace for the spring-loaded edit state.
      */
     public float getWorkspaceSpringLoadScale() {
-        float cellLayoutHeight = availableHeightPx - workspacePadding.top - workspacePadding.bottom;
-        float scale = (getWorkspaceSpringLoadShrunkBottom() - getWorkspaceSpringLoadShrunkTop())
-                / cellLayoutHeight;
+        float scale = (getCellLayoutSpringLoadShrunkBottom() - getCellLayoutSpringLoadShrunkTop())
+                / getCellLayoutHeight();
         scale = Math.min(scale, 1f);
 
         // Reduce scale if next pages would not be visible after scaling the workspace
@@ -976,19 +976,55 @@
         return scale;
     }
 
+    /**
+     * Gets the width of the Workspace, aka a scrollable page of the homescreen.
+     */
     public int getWorkspaceWidth() {
-        return getWorkspaceWidth(getTotalWorkspacePadding());
+        return availableWidthPx;
     }
 
-    public int getWorkspaceWidth(Point workspacePadding) {
-        int cellLayoutTotalPadding =
-                (isTwoPanels ? 2 : 1) * (cellLayoutPaddingPx.left + cellLayoutPaddingPx.right);
-        return availableWidthPx - workspacePadding.x - cellLayoutTotalPadding;
+    /**
+     * Gets the height of the Workspace, aka a scrollable page of the homescreen.
+     */
+    public int getWorkspaceHeight() {
+        return availableHeightPx;
     }
 
-    private int getWorkspaceHeight(Point workspacePadding) {
-        return availableHeightPx - workspacePadding.y - (cellLayoutPaddingPx.top
-                + cellLayoutPaddingPx.bottom);
+    /**
+     * Gets the width of a single Cell Layout, aka a single panel within a Workspace.
+     *
+     * <p>This is the width of a Workspace, less its horizontal padding. Note that two-panel
+     * layouts have two Cell Layouts per workspace.
+     */
+    public int getCellLayoutWidth() {
+        return (getWorkspaceWidth() - getTotalWorkspacePadding().x) / getPanelCount();
+    }
+
+    /**
+     * Gets the height of a single Cell Layout, aka a single panel within a Workspace.
+     *
+     * <p>This is the height of a Workspace, less its vertical padding.
+     */
+    public int getCellLayoutHeight() {
+        return getWorkspaceHeight() - getTotalWorkspacePadding().y;
+    }
+
+    /**
+     * Gets the width of the container holding the shortcuts and widgets.
+     *
+     * <p>This is the width of one Cell Layout less its horizontal padding.
+     */
+    public int getShortcutAndWidgetContainerWidth() {
+        return getCellLayoutWidth() - (cellLayoutPaddingPx.left + cellLayoutPaddingPx.right);
+    }
+
+    /**
+     * Gets the height of the container holding the shortcuts and widgets.
+     *
+     * <p>This is the height of one Cell Layout less its vertical padding.
+     */
+    public int getShortcutAndWidgetContainerHeight() {
+        return getCellLayoutHeight() - (cellLayoutPaddingPx.top + cellLayoutPaddingPx.bottom);
     }
 
     public Point getTotalWorkspacePadding() {
diff --git a/src/com/android/launcher3/states/SpringLoadedState.java b/src/com/android/launcher3/states/SpringLoadedState.java
index 15cdc20..a205ab5 100644
--- a/src/com/android/launcher3/states/SpringLoadedState.java
+++ b/src/com/android/launcher3/states/SpringLoadedState.java
@@ -51,7 +51,7 @@
             return super.getWorkspaceScaleAndTranslation(launcher);
         }
 
-        float shrunkTop = grid.getWorkspaceSpringLoadShrunkTop();
+        float shrunkTop = grid.getCellLayoutSpringLoadShrunkTop();
         float scale = grid.getWorkspaceSpringLoadScale();
 
         float halfHeight = ws.getHeight() / 2;
diff --git a/tests/src/com/android/launcher3/DeviceProfileGridDimensionsTest.kt b/tests/src/com/android/launcher3/DeviceProfileGridDimensionsTest.kt
new file mode 100644
index 0000000..63abc7d
--- /dev/null
+++ b/tests/src/com/android/launcher3/DeviceProfileGridDimensionsTest.kt
@@ -0,0 +1,258 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.android.launcher3
+
+import android.graphics.PointF
+import androidx.test.ext.junit.runners.AndroidJUnit4
+import androidx.test.filters.SmallTest
+import com.android.launcher3.util.WindowBounds
+import com.google.common.truth.Truth.assertThat
+import org.junit.Test
+import org.junit.runner.RunWith
+import org.mockito.ArgumentMatchers
+import org.mockito.Mockito.`when` as whenever
+
+/**
+ * Test for [DeviceProfile] grid dimensions.
+ *
+ * This includes workspace, cell layout, shortcut and widget container, cell sizes, etc.
+ */
+@SmallTest
+@RunWith(AndroidJUnit4::class)
+class DeviceProfileGridDimensionsTest : DeviceProfileBaseTest() {
+
+    @Test
+    fun getWorkspaceWidth_twoPanelLandscapeScalable4By4GridTablet_workspaceWidthIsFullPage() {
+        val tabletWidth = 2560
+        val tabletHeight = 1600
+        val availableWidth = 2560
+        val availableHeight = 1500
+        windowBounds = WindowBounds(tabletWidth, tabletHeight, availableWidth, availableHeight, 0)
+        useTwoPanels = true
+        whenever(info.isTablet(ArgumentMatchers.any())).thenReturn(true)
+        whenever(info.getDensityDpi()).thenReturn(320)
+        inv = getScalable4By4InvariantDeviceProfile()
+
+        val dp = newDP()
+
+        val expectedWorkspaceWidth = availableWidth
+        assertThat(dp.workspaceWidth).isEqualTo(expectedWorkspaceWidth)
+    }
+
+    @Test
+    fun getWorkspaceHeight_twoPanelLandscapeScalable4By4GridTablet_workspaceHeightIsFullPage() {
+        val tabletWidth = 2560
+        val tabletHeight = 1600
+        val availableWidth = 2560
+        val availableHeight = 1500
+        windowBounds = WindowBounds(tabletWidth, tabletHeight, availableWidth, availableHeight, 0)
+        useTwoPanels = true
+        whenever(info.isTablet(ArgumentMatchers.any())).thenReturn(true)
+        whenever(info.getDensityDpi()).thenReturn(320)
+        inv = getScalable4By4InvariantDeviceProfile()
+
+        val dp = newDP()
+
+        val expectedWorkspaceHeight = availableHeight
+        assertThat(dp.workspaceHeight).isEqualTo(expectedWorkspaceHeight)
+    }
+
+    @Test
+    fun getCellLayoutWidth_twoPanelLandscapeScalable4By4GridTablet_equalsSinglePanelWidth() {
+        val tabletWidth = 2560
+        val tabletHeight = 1600
+        val availableWidth = 2560
+        val availableHeight = 1500
+        windowBounds = WindowBounds(tabletWidth, tabletHeight, availableWidth, availableHeight, 0)
+        useTwoPanels = true
+        whenever(info.isTablet(ArgumentMatchers.any())).thenReturn(true)
+        whenever(info.getDensityDpi()).thenReturn(320)
+        inv = getScalable4By4InvariantDeviceProfile()
+
+        val dp = newDP()
+
+        val expectedWorkspaceWidth = availableWidth
+        val expectedCellLayoutWidth =
+                (expectedWorkspaceWidth - (dp.workspacePadding.right + dp.workspacePadding.left)) /
+                        dp.panelCount
+        assertThat(dp.cellLayoutWidth).isEqualTo(expectedCellLayoutWidth)
+    }
+
+    @Test
+    fun getCellLayoutHeight_twoPanelLandscapeScalable4By4GridTablet_equalsSinglePanelHeight() {
+        val tabletWidth = 2560
+        val tabletHeight = 1600
+        val availableWidth = 2560
+        val availableHeight = 1500
+        windowBounds = WindowBounds(tabletWidth, tabletHeight, availableWidth, availableHeight, 0)
+        useTwoPanels = true
+        whenever(info.isTablet(ArgumentMatchers.any())).thenReturn(true)
+        whenever(info.getDensityDpi()).thenReturn(320)
+        inv = getScalable4By4InvariantDeviceProfile()
+
+        val dp = newDP()
+
+        val expectedWorkspaceHeight = availableHeight
+        val expectedCellLayoutHeight =
+                expectedWorkspaceHeight - (dp.workspacePadding.top + dp.workspacePadding.bottom)
+        assertThat(dp.cellLayoutHeight).isEqualTo(expectedCellLayoutHeight)
+    }
+
+    @Test
+    fun getShortcutAndWidgetContainerWidth_twoPanelLandscapeScalable4By4GridTablet_equalsIconsPlusBorderSpacesWidth() {
+        val tabletWidth = 2560
+        val tabletHeight = 1600
+        val availableWidth = 2560
+        val availableHeight = 1500
+        windowBounds = WindowBounds(tabletWidth, tabletHeight, availableWidth, availableHeight, 0)
+        useTwoPanels = true
+        whenever(info.isTablet(ArgumentMatchers.any())).thenReturn(true)
+        whenever(info.getDensityDpi()).thenReturn(320)
+        inv = getScalable4By4InvariantDeviceProfile()
+
+        val dp = newDP()
+
+        val expectedWorkspaceWidth = availableWidth
+        val expectedCellLayoutWidth =
+                (expectedWorkspaceWidth - (dp.workspacePadding.right + dp.workspacePadding.left)) /
+                        dp.panelCount
+        val expectedShortcutAndWidgetContainerWidth = expectedCellLayoutWidth -
+                (dp.cellLayoutPaddingPx.left + dp.cellLayoutPaddingPx.right)
+        assertThat(dp.shortcutAndWidgetContainerWidth).isEqualTo(expectedShortcutAndWidgetContainerWidth)
+    }
+
+    @Test
+    fun getShortcutAndWidgetContainerHeight_twoPanelLandscapeScalable4By4GridTablet_equalsIconsPlusBorderSpacesHeight() {
+        val tabletWidth = 2560
+        val tabletHeight = 1600
+        val availableWidth = 2560
+        val availableHeight = 1500
+        windowBounds = WindowBounds(tabletWidth, tabletHeight, availableWidth, availableHeight, 0)
+        useTwoPanels = true
+        whenever(info.isTablet(ArgumentMatchers.any())).thenReturn(true)
+        whenever(info.getDensityDpi()).thenReturn(320)
+        inv = getScalable4By4InvariantDeviceProfile()
+
+        val dp = newDP()
+
+        val expectedWorkspaceHeight = availableHeight
+        val expectedCellLayoutHeight =
+                expectedWorkspaceHeight - (dp.workspacePadding.top + dp.workspacePadding.bottom)
+        val expectedShortcutAndWidgetContainerHeight = expectedCellLayoutHeight -
+                (dp.cellLayoutPaddingPx.top + dp.cellLayoutPaddingPx.bottom)
+        assertThat(dp.shortcutAndWidgetContainerHeight).isEqualTo(
+                expectedShortcutAndWidgetContainerHeight)
+    }
+
+    @Test
+    fun getCellSize_twoPanelLandscapeScalable4By4GridTablet_equalsSinglePanelWidth() {
+        val tabletWidth = 2560
+        val tabletHeight = 1600
+        val availableWidth = 2560
+        val availableHeight = 1500
+        windowBounds = WindowBounds(tabletWidth, tabletHeight, availableWidth, availableHeight, 0)
+        useTwoPanels = true
+        whenever(info.isTablet(ArgumentMatchers.any())).thenReturn(true)
+        whenever(info.getDensityDpi()).thenReturn(320)
+        inv = getScalable4By4InvariantDeviceProfile()
+
+        val dp = newDP()
+
+        val expectedWorkspaceWidth = availableWidth
+        val expectedCellLayoutWidth =
+                (expectedWorkspaceWidth - (dp.workspacePadding.right + dp.workspacePadding.left)) /
+                        dp.panelCount
+        val expectedShortcutAndWidgetContainerWidth =
+                expectedCellLayoutWidth -
+                        (dp.cellLayoutPaddingPx.left + dp.cellLayoutPaddingPx.right)
+        assertThat(dp.getCellSize().x).isEqualTo(
+                (expectedShortcutAndWidgetContainerWidth -
+                        ((inv!!.numColumns - 1) * dp.cellLayoutBorderSpacePx.x)) / inv!!.numColumns)
+        val expectedWorkspaceHeight = availableHeight
+        val expectedCellLayoutHeight =
+                expectedWorkspaceHeight - (dp.workspacePadding.top + dp.workspacePadding.bottom)
+        val expectedShortcutAndWidgetContainerHeight = expectedCellLayoutHeight -
+                (dp.cellLayoutPaddingPx.top + dp.cellLayoutPaddingPx.bottom)
+        assertThat(dp.getCellSize().y).isEqualTo(
+                (expectedShortcutAndWidgetContainerHeight -
+                        ((inv!!.numRows - 1) * dp.cellLayoutBorderSpacePx.y)) / inv!!.numRows)
+    }
+
+    @Test
+    fun getPanelCount_twoPanelLandscapeScalable4By4GridTablet_equalsTwoPanels() {
+        val tabletWidth = 2560
+        val tabletHeight = 1600
+        val availableWidth = 2560
+        val availableHeight = 1500
+        windowBounds = WindowBounds(tabletWidth, tabletHeight, availableWidth, availableHeight, 0)
+        useTwoPanels = true
+        whenever(info.isTablet(ArgumentMatchers.any())).thenReturn(true)
+        whenever(info.getDensityDpi()).thenReturn(320)
+        inv = getScalable4By4InvariantDeviceProfile()
+
+        val dp = newDP()
+
+        assertThat(dp.panelCount).isEqualTo(2)
+    }
+
+    fun getScalable4By4InvariantDeviceProfile(): InvariantDeviceProfile {
+        return InvariantDeviceProfile().apply {
+            isScalable = true
+            numColumns = 4
+            numRows = 4
+            numShownHotseatIcons = 4
+            numDatabaseHotseatIcons = 6
+            numShrunkenHotseatIcons = 5
+            horizontalMargin = FloatArray(4) { 22f }
+            borderSpaces = listOf(
+                    PointF(16f, 16f),
+                    PointF(16f, 16f),
+                    PointF(16f, 16f),
+                    PointF(16f, 16f)
+            ).toTypedArray()
+            allAppsBorderSpaces = listOf(
+                    PointF(16f, 16f),
+                    PointF(16f, 16f),
+                    PointF(16f, 16f),
+                    PointF(16f, 16f)
+            ).toTypedArray()
+            hotseatBorderSpaces = FloatArray(4) { 16f }
+            hotseatColumnSpan = IntArray(4) { 4 }
+            iconSize = FloatArray(4) { 56f }
+            allAppsIconSize = FloatArray(4) { 56f }
+            iconTextSize = FloatArray(4) { 14f }
+            allAppsIconTextSize = FloatArray(4) { 14f }
+            minCellSize = listOf(
+                    PointF(64f, 83f),
+                    PointF(64f, 83f),
+                    PointF(64f, 83f),
+                    PointF(64f, 83f)
+            ).toTypedArray()
+            allAppsCellSize = listOf(
+                    PointF(64f, 83f),
+                    PointF(64f, 83f),
+                    PointF(64f, 83f),
+                    PointF(64f, 83f)
+            ).toTypedArray()
+            inlineQsb = booleanArrayOf(
+                    false,
+                    false,
+                    false,
+                    false
+            )
+        }
+    }
+}
\ No newline at end of file