diff --git a/yt_dlp/downloader/http.py b/yt_dlp/downloader/http.py
index dfe86d159..3edd7b760 100644
--- a/yt_dlp/downloader/http.py
+++ b/yt_dlp/downloader/http.py
@@ -62,6 +62,10 @@ class HttpFD(FileDownloader):
 
         ctx.is_resume = ctx.resume_len > 0
 
+        ctx.start_len = 0
+        if ctx.is_resume:
+            ctx.start_len = ctx.resume_len
+
         class SucceedDownload(Exception):
             pass
 
@@ -300,7 +304,7 @@ class HttpFD(FileDownloader):
                 if ctx.data_len is None:
                     eta = None
                 else:
-                    eta = self.calc_eta(ctx.start_time, time.time(), ctx.data_len, byte_counter)
+                    eta = self.calc_eta(ctx.start_time, time.time(), ctx.data_len - ctx.start_len, byte_counter - ctx.start_len)
 
                 self._hook_progress({
                     'status': 'downloading',