diff --git a/backends/kwayland/waylandoutput.cpp b/backends/kwayland/waylandoutput.cpp
--- a/backends/kwayland/waylandoutput.cpp
+++ b/backends/kwayland/waylandoutput.cpp
@@ -148,7 +148,8 @@
         }
 
         mode->setId(modeid);
-        mode->setRefreshRate(m.refreshRate);
+        // KWayland gives the refresh rate as int in mHz
+        mode->setRefreshRate(m.refreshRate / 1000.0);
         mode->setSize(m.size);
         mode->setName(modename);
         if (m.flags.testFlag(KWayland::Client::OutputDevice::Mode::Flag::Current)) {