diff --git a/feature/calculator/src/main/java/com/sadellie/unitto/feature/calculator/CalculatorScreen.kt b/feature/calculator/src/main/java/com/sadellie/unitto/feature/calculator/CalculatorScreen.kt
index 5930c9d6..4fcc1ba9 100644
--- a/feature/calculator/src/main/java/com/sadellie/unitto/feature/calculator/CalculatorScreen.kt
+++ b/feature/calculator/src/main/java/com/sadellie/unitto/feature/calculator/CalculatorScreen.kt
@@ -70,6 +70,7 @@ import com.sadellie.unitto.core.ui.common.textfield.ExpressionTextField
 import com.sadellie.unitto.core.ui.common.textfield.UnformattedTextField
 import com.sadellie.unitto.data.model.HistoryItem
 import com.sadellie.unitto.feature.calculator.components.CalculatorKeyboard
+import com.sadellie.unitto.feature.calculator.components.CalculatorKeyboardLoading
 import com.sadellie.unitto.feature.calculator.components.HistoryList
 import java.text.SimpleDateFormat
 import java.util.Locale
@@ -80,25 +81,31 @@ internal fun CalculatorRoute(
     navigateToSettings: () -> Unit,
     viewModel: CalculatorViewModel = hiltViewModel()
 ) {
-    val uiState = viewModel.uiState.collectAsStateWithLifecycle()
+    val uiState = viewModel.uiState.collectAsStateWithLifecycle().value
 
-    CalculatorScreen(
-        uiState = uiState.value,
-        navigateToMenu = navigateToMenu,
-        navigateToSettings = navigateToSettings,
-        addSymbol = viewModel::addTokens,
-        clearSymbols = viewModel::clearInput,
-        deleteSymbol = viewModel::deleteTokens,
-        onCursorChange = viewModel::onCursorChange,
-        toggleAngleMode = viewModel::toggleCalculatorMode,
-        evaluate = viewModel::evaluate,
-        clearHistory = viewModel::clearHistory
-    )
+    when (uiState) {
+        is CalculatorUIState.Loading -> Loading(
+            navigateToMenu = navigateToMenu,
+            navigateToSettings = navigateToSettings,
+        )
+        is CalculatorUIState.Ready -> CalculatorScreen(
+            uiState = uiState,
+            navigateToMenu = navigateToMenu,
+            navigateToSettings = navigateToSettings,
+            addSymbol = viewModel::addTokens,
+            clearSymbols = viewModel::clearInput,
+            deleteSymbol = viewModel::deleteTokens,
+            onCursorChange = viewModel::onCursorChange,
+            toggleAngleMode = viewModel::toggleCalculatorMode,
+            evaluate = viewModel::evaluate,
+            clearHistory = viewModel::clearHistory
+        )
+    }
 }
 
 @Composable
 private fun CalculatorScreen(
-    uiState: CalculatorUIState,
+    uiState: CalculatorUIState.Ready,
     navigateToMenu: () -> Unit,
     navigateToSettings: () -> Unit,
     addSymbol: (String) -> Unit,
@@ -317,6 +324,80 @@ private fun CalculatorScreen(
     }
 }
 
+@Composable
+private fun Loading(
+    navigateToMenu: () -> Unit,
+    navigateToSettings: () -> Unit,
+) {
+    UnittoScreenWithTopBar(
+        title = { Text(stringResource(R.string.calculator)) },
+        navigationIcon = { MenuButton { navigateToMenu() } },
+        colors = TopAppBarDefaults.topAppBarColors(MaterialTheme.colorScheme.surfaceVariant),
+        actions = { SettingsButton(navigateToSettings) }
+    ) { paddingValues ->
+        BoxWithConstraints(
+            modifier = Modifier.padding(paddingValues),
+        ) {
+            // Input
+            Column(
+                Modifier
+                    .height(maxHeight * 0.25f)
+                    .background(
+                        MaterialTheme.colorScheme.surfaceVariant,
+                        RoundedCornerShape(
+                            topStartPercent = 0, topEndPercent = 0,
+                            bottomStartPercent = 20, bottomEndPercent = 20
+                        )
+                    )
+                    .padding(top = 12.dp),
+                horizontalAlignment = Alignment.CenterHorizontally,
+                verticalArrangement = Arrangement.spacedBy(8.dp)
+            ) {
+                UnformattedTextField(
+                    modifier = Modifier
+                        .weight(2f)
+                        .fillMaxWidth()
+                        .padding(horizontal = 8.dp),
+                    value = TextFieldValue(),
+                    minRatio = 0.5f,
+                    onCursorChange = {},
+                )
+                if (LocalConfiguration.current.orientation == Configuration.ORIENTATION_PORTRAIT) {
+                    UnformattedTextField(
+                        modifier = Modifier
+                            .weight(1f)
+                            .fillMaxWidth()
+                            .padding(horizontal = 8.dp),
+                        value = TextFieldValue(),
+                        minRatio = 1f,
+                        onCursorChange = {},
+                        readOnly = true,
+                    )
+                }
+                // Handle
+                Box(
+                    Modifier
+                        .padding(8.dp)
+                        .background(
+                            MaterialTheme.colorScheme.onSurfaceVariant,
+                            RoundedCornerShape(100)
+                        )
+                        .sizeIn(24.dp, 4.dp)
+                )
+            }
+
+            // Keyboard
+            CalculatorKeyboardLoading(
+                modifier = Modifier
+                    .offset(y = maxHeight * 0.25f)
+                    .height(maxHeight * 0.75f)
+                    .fillMaxWidth()
+                    .padding(horizontal = 8.dp, vertical = 4.dp),
+            )
+        }
+    }
+}
+
 @Preview(widthDp = 432, heightDp = 1008, device = "spec:parent=pixel_5,orientation=portrait")
 @Preview(widthDp = 432, heightDp = 864, device = "spec:parent=pixel_5,orientation=portrait")
 @Preview(widthDp = 597, heightDp = 1393, device = "spec:parent=pixel_5,orientation=portrait")
@@ -346,7 +427,7 @@ private fun PreviewCalculatorScreen() {
     }
 
     CalculatorScreen(
-        uiState = CalculatorUIState(
+        uiState = CalculatorUIState.Ready(
             input = TextFieldValue("1.2345"),
             output = CalculationResult.Default("1234"),
             history = historyItems
diff --git a/feature/calculator/src/main/java/com/sadellie/unitto/feature/calculator/CalculatorUIState.kt b/feature/calculator/src/main/java/com/sadellie/unitto/feature/calculator/CalculatorUIState.kt
index 11f2f056..51a3e4ba 100644
--- a/feature/calculator/src/main/java/com/sadellie/unitto/feature/calculator/CalculatorUIState.kt
+++ b/feature/calculator/src/main/java/com/sadellie/unitto/feature/calculator/CalculatorUIState.kt
@@ -24,15 +24,19 @@ import com.sadellie.unitto.core.base.R
 import com.sadellie.unitto.core.ui.common.textfield.FormatterSymbols
 import com.sadellie.unitto.data.model.HistoryItem
 
-data class CalculatorUIState(
-    val input: TextFieldValue = TextFieldValue(),
-    val output: CalculationResult = CalculationResult.Default(),
-    val radianMode: Boolean = true,
-    val history: List<HistoryItem> = emptyList(),
-    val allowVibration: Boolean = false,
-    val formatterSymbols: FormatterSymbols = FormatterSymbols.Spaces,
-    val middleZero: Boolean = false,
-)
+internal sealed class CalculatorUIState {
+    data object Loading : CalculatorUIState()
+
+    data class Ready(
+        val input: TextFieldValue = TextFieldValue(),
+        val output: CalculationResult = CalculationResult.Default(),
+        val radianMode: Boolean = true,
+        val history: List<HistoryItem> = emptyList(),
+        val allowVibration: Boolean = false,
+        val formatterSymbols: FormatterSymbols = FormatterSymbols.Spaces,
+        val middleZero: Boolean = false,
+    ) : CalculatorUIState()
+}
 
 sealed class CalculationResult(@StringRes val label: Int? = null) {
     data class Default(val text: String = "") : CalculationResult()
diff --git a/feature/calculator/src/main/java/com/sadellie/unitto/feature/calculator/CalculatorViewModel.kt b/feature/calculator/src/main/java/com/sadellie/unitto/feature/calculator/CalculatorViewModel.kt
index 234af7fa..c770a1a6 100644
--- a/feature/calculator/src/main/java/com/sadellie/unitto/feature/calculator/CalculatorViewModel.kt
+++ b/feature/calculator/src/main/java/com/sadellie/unitto/feature/calculator/CalculatorViewModel.kt
@@ -69,7 +69,7 @@ internal class CalculatorViewModel @Inject constructor(
     val uiState = combine(
         _input, _output, _history, _userPrefs
     ) { input, output, history, userPrefs ->
-        return@combine CalculatorUIState(
+        return@combine CalculatorUIState.Ready(
             input = input,
             output = output,
             radianMode = userPrefs.radianMode,
@@ -79,7 +79,7 @@ internal class CalculatorViewModel @Inject constructor(
             middleZero = userPrefs.middleZero,
         )
     }.stateIn(
-        viewModelScope, SharingStarted.WhileSubscribed(5000L), CalculatorUIState()
+        viewModelScope, SharingStarted.WhileSubscribed(5000L), CalculatorUIState.Loading
     )
 
     fun addTokens(tokens: String) = _input.update { it.addTokens(tokens) }
diff --git a/feature/calculator/src/main/java/com/sadellie/unitto/feature/calculator/components/CalculatorKeyboard.kt b/feature/calculator/src/main/java/com/sadellie/unitto/feature/calculator/components/CalculatorKeyboard.kt
index 83402bc1..fe2e2857 100644
--- a/feature/calculator/src/main/java/com/sadellie/unitto/feature/calculator/components/CalculatorKeyboard.kt
+++ b/feature/calculator/src/main/java/com/sadellie/unitto/feature/calculator/components/CalculatorKeyboard.kt
@@ -24,6 +24,7 @@ import androidx.compose.animation.Crossfade
 import androidx.compose.animation.core.FastOutSlowInEasing
 import androidx.compose.animation.core.animateFloatAsState
 import androidx.compose.animation.core.tween
+import androidx.compose.foundation.background
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.Column
@@ -34,6 +35,7 @@ import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.height
 import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.layout.size
+import androidx.compose.foundation.shape.RoundedCornerShape
 import androidx.compose.material.icons.Icons
 import androidx.compose.material.icons.filled.ExpandLess
 import androidx.compose.material3.Icon
@@ -48,9 +50,11 @@ import androidx.compose.runtime.remember
 import androidx.compose.runtime.setValue
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
+import androidx.compose.ui.draw.clip
 import androidx.compose.ui.draw.rotate
 import androidx.compose.ui.platform.LocalConfiguration
 import androidx.compose.ui.tooling.preview.Preview
+import androidx.compose.ui.unit.dp
 import com.sadellie.unitto.core.base.Token
 import com.sadellie.unitto.core.ui.common.ColumnWithConstraints
 import com.sadellie.unitto.core.ui.common.KeyboardButtonAdditional
@@ -140,6 +144,118 @@ internal fun CalculatorKeyboard(
     }
 }
 
+@Composable
+internal fun CalculatorKeyboardLoading(
+    modifier: Modifier
+) {
+    if (LocalConfiguration.current.orientation == Configuration.ORIENTATION_PORTRAIT) {
+        PortraitKeyboardLoading(modifier)
+    } else {
+        LandscapeKeyboardLoading(modifier)
+    }
+}
+
+@Composable
+private fun PortraitKeyboardLoading(
+    modifier: Modifier
+) {
+    ColumnWithConstraints(
+        modifier = modifier
+    ) { constraints ->
+
+        val additionalButtonHeight by remember {
+            mutableStateOf(constraints.maxHeight * 0.09f)
+        }
+
+        val spacerHeight by remember {
+            mutableStateOf(constraints.maxHeight * 0.025f)
+        }
+
+        val additionalRowSpacedBy by remember {
+            mutableStateOf(constraints.maxWidth * 0.03f)
+        }
+
+        val weightModifier = Modifier.weight(1f)
+        val additionalButtonModifier = Modifier
+            .weight(1f)
+            .height(additionalButtonHeight)
+
+        Spacer(modifier = Modifier.height(spacerHeight))
+
+        Row(
+            modifier = Modifier,
+            horizontalArrangement = Arrangement.spacedBy(additionalRowSpacedBy)
+        ) {
+            // Additional buttons
+            Box(weightModifier) {
+                AdditionalButtonsPortrait(
+                    modifier = additionalButtonModifier,
+                    allowVibration = false,
+                    addSymbol = {},
+                    showAdditional = false,
+                    radianMode = false,
+                    toggleAngleMode = {},
+                    toggleInvMode = {}
+                )
+            }
+
+            Box(
+                modifier = Modifier.size(additionalButtonHeight),
+                contentAlignment = Alignment.Center
+            ) {
+                // Expand/Collapse
+                IconButton(
+                    onClick = {  },
+                    colors = IconButtonDefaults.iconButtonColors(containerColor = MaterialTheme.colorScheme.inverseOnSurface)
+                ) {
+                    Icon(Icons.Default.ExpandLess, null)
+                }
+            }
+        }
+
+        Spacer(modifier = Modifier.height(spacerHeight))
+
+        Box(
+            modifier = weightModifier
+                .clip(RoundedCornerShape(32.dp))
+                .background(MaterialTheme.colorScheme.inverseOnSurface)
+                .fillMaxSize()
+        )
+
+        Spacer(modifier = Modifier.height(spacerHeight))
+    }
+}
+
+@Composable
+private fun LandscapeKeyboardLoading(
+    modifier: Modifier
+) {
+    RowWithConstraints(modifier) { constraints ->
+        val buttonModifier = Modifier
+            .fillMaxWidth()
+            .weight(1f)
+            .padding(constraints.maxWidth * 0.005f, constraints.maxHeight * 0.02f)
+
+        AdditionalButtonsLandscape(
+            modifier = Modifier.weight(1f),
+            buttonModifier = buttonModifier,
+            allowVibration = false,
+            radianMode = false,
+            addSymbol = {},
+            toggleAngleMode = {},
+            toggleInvMode = {}
+        )
+
+        Box(
+            modifier = Modifier
+                .clip(RoundedCornerShape(32.dp))
+                .background(MaterialTheme.colorScheme.inverseOnSurface)
+                .weight(5f)
+                .fillMaxSize()
+        )
+    }
+}
+
 @Composable
 private fun PortraitKeyboard(
     modifier: Modifier,
diff --git a/feature/converter/src/main/java/com/sadellie/unitto/feature/converter/ConverterScreen.kt b/feature/converter/src/main/java/com/sadellie/unitto/feature/converter/ConverterScreen.kt
index 58d601b0..b6e254a7 100644
--- a/feature/converter/src/main/java/com/sadellie/unitto/feature/converter/ConverterScreen.kt
+++ b/feature/converter/src/main/java/com/sadellie/unitto/feature/converter/ConverterScreen.kt
@@ -28,12 +28,15 @@ import androidx.compose.animation.expandHorizontally
 import androidx.compose.animation.fadeIn
 import androidx.compose.animation.fadeOut
 import androidx.compose.animation.togetherWith
+import androidx.compose.foundation.background
+import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.Row
 import androidx.compose.foundation.layout.Spacer
 import androidx.compose.foundation.layout.fillMaxSize
 import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.height
 import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.shape.RoundedCornerShape
 import androidx.compose.material.icons.Icons
 import androidx.compose.material.icons.outlined.SwapHoriz
 import androidx.compose.material3.Icon
@@ -48,6 +51,7 @@ import androidx.compose.runtime.remember
 import androidx.compose.runtime.setValue
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
+import androidx.compose.ui.draw.clip
 import androidx.compose.ui.draw.rotate
 import androidx.compose.ui.graphics.Color
 import androidx.compose.ui.platform.LocalContext
@@ -56,6 +60,7 @@ import androidx.compose.ui.text.TextRange
 import androidx.compose.ui.text.input.TextFieldValue
 import androidx.compose.ui.text.style.TextAlign
 import androidx.compose.ui.tooling.preview.Preview
+import androidx.compose.ui.unit.dp
 import androidx.hilt.navigation.compose.hiltViewModel
 import androidx.lifecycle.compose.collectAsStateWithLifecycle
 import com.sadellie.unitto.core.base.OutputFormat
@@ -72,7 +77,6 @@ import com.sadellie.unitto.core.ui.common.textfield.UnformattedTextField
 import com.sadellie.unitto.data.common.format
 import com.sadellie.unitto.data.model.unit.AbstractUnit
 import com.sadellie.unitto.feature.converter.components.DefaultKeyboard
-import com.sadellie.unitto.feature.converter.components.LoadingKeyboard
 import com.sadellie.unitto.feature.converter.components.NumberBaseKeyboard
 import com.sadellie.unitto.feature.converter.components.UnitSelectionButton
 
@@ -191,7 +195,12 @@ private fun ConverterLoading(modifier: Modifier) {
             }
         },
         content2 = {
-            LoadingKeyboard(modifier = it)
+            Box(
+                modifier = it
+                    .clip(RoundedCornerShape(32.dp))
+                    .background(MaterialTheme.colorScheme.inverseOnSurface)
+                    .fillMaxSize()
+            )
         }
     )
 }
diff --git a/feature/converter/src/main/java/com/sadellie/unitto/feature/converter/components/ConverterKeyboard.kt b/feature/converter/src/main/java/com/sadellie/unitto/feature/converter/components/ConverterKeyboard.kt
index e239853c..bf43af88 100644
--- a/feature/converter/src/main/java/com/sadellie/unitto/feature/converter/components/ConverterKeyboard.kt
+++ b/feature/converter/src/main/java/com/sadellie/unitto/feature/converter/components/ConverterKeyboard.kt
@@ -18,19 +18,13 @@
 
 package com.sadellie.unitto.feature.converter.components
 
-import androidx.compose.foundation.background
 import androidx.compose.foundation.layout.Arrangement
-import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.Row
 import androidx.compose.foundation.layout.fillMaxSize
 import androidx.compose.foundation.layout.padding
-import androidx.compose.foundation.shape.RoundedCornerShape
-import androidx.compose.material3.MaterialTheme
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.remember
 import androidx.compose.ui.Modifier
-import androidx.compose.ui.draw.clip
-import androidx.compose.ui.unit.dp
 import com.sadellie.unitto.core.base.Token
 import com.sadellie.unitto.core.ui.common.ColumnWithConstraints
 import com.sadellie.unitto.core.ui.common.KeyboardButtonFilled
@@ -169,15 +163,3 @@ internal fun NumberBaseKeyboard(
         }
     }
 }
-
-@Composable
-internal fun LoadingKeyboard(
-    modifier: Modifier,
-) {
-    Box(
-        modifier = modifier
-            .clip(RoundedCornerShape(32.dp))
-            .background(MaterialTheme.colorScheme.inverseOnSurface)
-            .fillMaxSize()
-    )
-}