Live estimate
Hz
0
Hz
Updated each frame for a quick impression.
Monitor Refresh Rate Test
Check how many frames your screen can deliver in real time.
The test samples the animation frame timing in your browser to estimate your display's refresh rate.
The test samples the animation frame timing in your browser to estimate your display's refresh rate.
Running
Starting measurement
Final reading
Hz
–
Hz
Waiting for a stable window of frames.
Smoothness
0%Lower timing jitter means smoother motion.
How this test works
The tool uses requestAnimationFrame to read the browser's render cadence, averages recent frame gaps, and turns that into a Hertz estimate.
A short stability check looks for low jitter before locking in the final value.
Tips for accurate results
Keep this tab visible to avoid throttling.
Run the test in full screen for consistent timing.
If the rate seems off, restart and let it settle for a few seconds.