diff --git a/electron/utils/get-arguments.ts b/electron/utils/get-arguments.ts
index 43a468c..687c078 100644
--- a/electron/utils/get-arguments.ts
+++ b/electron/utils/get-arguments.ts
@@ -74,7 +74,6 @@ export const getDoubleUpscaleArguments = ({
     gpuId ? `-g ${gpuId}` : "",
     "-f",
     saveImageAs,
-    customWidth ? `-w ${customWidth}` : "",
   ];
 };
 
diff --git a/renderer/components/upscayl-tab/config/LeftPaneImageSteps.tsx b/renderer/components/upscayl-tab/config/LeftPaneImageSteps.tsx
index 778dfb4..b71a754 100644
--- a/renderer/components/upscayl-tab/config/LeftPaneImageSteps.tsx
+++ b/renderer/components/upscayl-tab/config/LeftPaneImageSteps.tsx
@@ -148,17 +148,28 @@ function LeftPaneImageSteps({
     let doubleScale = parseInt(scale) * parseInt(scale);
     let singleScale = parseInt(scale);
 
-    if (useCustomWidth) {
-    }
-
     if (doubleUpscayl) {
-      const newWidth = dimensions.width * doubleScale;
-      const newHeight = dimensions.height * doubleScale;
-      newDimensions.width = newWidth;
-      newDimensions.height = newHeight;
+      if (useCustomWidth) {
+        newDimensions.width = customWidth;
+        newDimensions.height = Math.round(
+          customWidth * (dimensions.height / dimensions.width),
+        );
+      } else {
+        const newWidth = dimensions.width * doubleScale;
+        const newHeight = dimensions.height * doubleScale;
+        newDimensions.width = newWidth;
+        newDimensions.height = newHeight;
+      }
     } else {
-      newDimensions.width = dimensions.width * singleScale;
-      newDimensions.height = dimensions.height * singleScale;
+      if (useCustomWidth) {
+        newDimensions.width = customWidth;
+        newDimensions.height = Math.round(
+          customWidth * (dimensions.height / dimensions.width),
+        );
+      } else {
+        newDimensions.width = dimensions.width * singleScale;
+        newDimensions.height = dimensions.height * singleScale;
+      }
     }
 
     return newDimensions;