Screen Hz Test
Estimate refresh rate, FPS, and frame timing on your current display setup.
Results may vary due to browser throttling, background tabs, battery saver, and monitor configuration.
Check Your Screen Refresh Rate
Run at least 5 seconds for an estimate. For phones, 8-20 seconds is recommended.
Detected refresh rate
--
Average FPS
--
Average frame time
--
Sample count
0
Stability
No sample yet
How the Screen Hz Test Works
This page samples frame timing with requestAnimationFrame for at least 5 seconds and estimates active refresh behavior from average intervals.
How to Get a More Accurate Result
- Keep this tab focused while sampling.
- Disable battery saver mode.
- Verify OS/monitor refresh-rate settings.
- Run multiple trials and compare averages.
Frequently Asked Questions
Why is my 144Hz monitor showing 60Hz?
OS display setting, cable/port limits, browser throttling, or power mode can cap results at 60Hz.
Can a browser detect my real refresh rate?
It estimates behavior from frame timing and is not a lab-grade panel measurement.
Is Hz the same as FPS?
No. Hz is display refresh capability; FPS is rendered frames per second.
Does this work on phones?
It works on many phones, but power-saving and browser behavior can affect results.