diff --git a/src/single_window/render.cpp b/src/single_window/render.cpp
index 603d671..cc10930 100644
--- a/src/single_window/render.cpp
+++ b/src/single_window/render.cpp
@@ -729,6 +729,15 @@ int Render::SetupMainWindow() {
 
   SetupFontAndStyle();
 
+  SDL_GetWindowSizeInPixels(main_window_, &main_window_width_real_,
+                            &main_window_height_real_);
+  main_window_dpi_scaling_w_ = main_window_width_real_ / main_window_width_;
+  main_window_dpi_scaling_h_ = main_window_width_real_ / main_window_width_;
+  SDL_SetRenderScale(main_renderer_, main_window_dpi_scaling_w_,
+                     main_window_dpi_scaling_h_);
+  LOG_INFO("Use dpi scaling [{}x{}] for main window",
+           main_window_dpi_scaling_w_, main_window_dpi_scaling_h_);
+
   ImGui_ImplSDL3_InitForSDLRenderer(main_window_, main_renderer_);
   ImGui_ImplSDLRenderer3_Init(main_renderer_);
 
@@ -758,6 +767,19 @@ int Render::SetupStreamWindow() {
 
   SetupFontAndStyle();
 
+  SDL_GetWindowSizeInPixels(stream_window_, &stream_window_width_real_,
+                            &stream_window_height_real_);
+
+  stream_window_dpi_scaling_w_ =
+      stream_window_width_real_ / stream_window_width_;
+  stream_window_dpi_scaling_h_ =
+      stream_window_width_real_ / stream_window_width_;
+
+  SDL_SetRenderScale(stream_renderer_, stream_window_dpi_scaling_w_,
+                     stream_window_dpi_scaling_h_);
+  LOG_INFO("Use dpi scaling [{}x{}] for stream window",
+           stream_window_dpi_scaling_w_, stream_window_dpi_scaling_h_);
+
   ImGui_ImplSDL3_InitForSDLRenderer(stream_window_, stream_renderer_);
   ImGui_ImplSDLRenderer3_Init(stream_renderer_);
 
diff --git a/src/single_window/render.h b/src/single_window/render.h
index 764736b..a9ce56e 100644
--- a/src/single_window/render.h
+++ b/src/single_window/render.h
@@ -301,6 +301,10 @@ class Render {
   bool foucs_on_main_window_ = false;
   bool foucs_on_stream_window_ = false;
   bool audio_capture_ = false;
+  int main_window_width_real_ = 720;
+  int main_window_height_real_ = 540;
+  float main_window_dpi_scaling_w_ = 1.0f;
+  float main_window_dpi_scaling_h_ = 1.0f;
   float main_window_width_default_ = 640;
   float main_window_height_default_ = 480;
   float main_window_width_ = 640;
@@ -364,6 +368,10 @@ class Render {
   float stream_window_width_ = 1280;
   float stream_window_height_ = 720;
   SDL_PixelFormat stream_pixformat_ = SDL_PIXELFORMAT_NV12;
+  int stream_window_width_real_ = 1280;
+  int stream_window_height_real_ = 720;
+  float stream_window_dpi_scaling_w_ = 1.0f;
+  float stream_window_dpi_scaling_h_ = 1.0f;
 
   bool label_inited_ = false;
   bool connect_button_pressed_ = false;