diff --git a/src/App.jsx b/src/App.jsx
index 6db76ce8..cbf0c782 100644
--- a/src/App.jsx
+++ b/src/App.jsx
@@ -621,12 +621,14 @@ const App = memo(() => {
       const outPath = getOutPath(newCustomOutDir, firstPath, `merged${ext}`);
 
       // console.log('merge', paths);
-      await ffmpegMergeFiles({ paths, outPath, allStreams });
+      await ffmpegMergeFiles({ paths, outPath, allStreams, onProgress: setCutProgress });
+      openDirToast({ icon: 'success', dirPath: outputDir, text: i18n.t('Files merged!') });
     } catch (err) {
       errorToast(i18n.t('Failed to merge files. Make sure they are all of the exact same codecs'));
       console.error('Failed to merge files', err);
     } finally {
       setWorking();
+      setCutProgress();
     }
   }, [assureOutDirAccess]);
 
@@ -997,7 +999,8 @@ const App = memo(() => {
       });
 
       if (outFiles.length > 1 && autoMerge) {
-        setCutProgress(0); // TODO implement progress
+        setCutProgress(0);
+        setWorking(i18n.t('Merging'));
 
         await autoMergeSegments({
           customOutDir,
@@ -1005,6 +1008,7 @@ const App = memo(() => {
           outFormat: fileFormat,
           isCustomFormatSelected,
           segmentPaths: outFiles,
+          onProgress: setCutProgress,
         });
       }
 
@@ -1035,6 +1039,7 @@ const App = memo(() => {
       showFfmpegFail(err);
     } finally {
       setWorking();
+      setCutProgress();
     }
   }, [
     effectiveRotation, outSegments, handleCutFailed, isRotationSet,
diff --git a/src/ffmpeg.js b/src/ffmpeg.js
index 0fa3686c..06d6b52b 100644
--- a/src/ffmpeg.js
+++ b/src/ffmpeg.js
@@ -422,9 +422,12 @@ export async function html5ifyDummy(filePath, outPath, onProgress) {
   await transferTimestamps(filePath, outPath);
 }
 
-export async function mergeFiles({ paths, outPath, allStreams, outFormat }) {
+export async function mergeFiles({ paths, outPath, allStreams, outFormat, onProgress = () => {} }) {
   console.log('Merging files', { paths }, 'to', outPath);
 
+  const durations = await pMap(paths, getDuration, { concurrency: 1 });
+  const totalDuration = sum(durations);
+
   // Keep this similar to cut()
   const ffmpegArgs = [
     '-hide_banner',
@@ -456,18 +459,20 @@ export async function mergeFiles({ paths, outPath, allStreams, outFormat }) {
   const ffmpegPath = getFfmpegPath();
   const process = execa(ffmpegPath, ffmpegArgs);
 
+  handleProgress(process, totalDuration, onProgress);
+
   stringToStream(concatTxt).pipe(process.stdin);
 
   const result = await process;
   console.log(result.stdout);
 }
 
-export async function autoMergeSegments({ customOutDir, sourceFile, isCustomFormatSelected, outFormat, segmentPaths }) {
+export async function autoMergeSegments({ customOutDir, sourceFile, isCustomFormatSelected, outFormat, segmentPaths, onProgress }) {
   const ext = getOutFileExtension({ isCustomFormatSelected, outFormat, filePath: sourceFile });
   const fileName = `cut-merged-${new Date().getTime()}${ext}`;
   const outPath = getOutPath(customOutDir, sourceFile, fileName);
 
-  await mergeFiles({ paths: segmentPaths, outPath, outFormat, allStreams: true });
+  await mergeFiles({ paths: segmentPaths, outPath, outFormat, allStreams: true, onProgress });
   await pMap(segmentPaths, path => fs.unlink(path), { concurrency: 5 });
 }