Screen Refresh Rate Test - Measure Your Monitor’s Hz and Frame Pacing
Screen Refresh Rate Test
Find out how many times per second your screen really updates
Real Measurement
Times every frame the browser draws and reports the median rate, so a 144 Hz monitor stuck at 60 Hz shows up immediately.
Pacing, Not Just Speed
Jitter, slow frames and the 1 percent low show whether frames arrive evenly, which matters as much as the average.
Closest Standard Rate
The result is matched to common refresh rates such as 60, 75, 120, 144, 165 and 240 Hz.
Private
The test runs locally and sends nothing.
Why Your Screen May Not Run at Its Rated Speed
A 144 Hz monitor only updates 144 times a second if the operating system, the graphics driver and the cable all allow it. It is common to buy a fast display and leave it at 60 Hz in the display settings, or to connect it with a cable or port that cannot carry the higher mode. A browser can see the real number because it draws a new frame each time the screen is ready for one, so counting those frames over a few seconds gives the refresh rate your system is actually using.
Two other things shape how a screen feels. Frame pacing is how evenly the frames arrive: a stable 60 Hz can look smoother than an uneven 90. The 1 percent low is the speed of the slowest hundredth of frames, which is where stutter shows up. Browsers can limit the frame rate to save battery, on laptops in power-saving mode or when the tab is hidden, so keep the tab visible and the laptop plugged in. A variable refresh rate display can also vary by design, so the measured number can sit below the maximum.
Key Takeaways
- Keep the tab in front: Background tabs are slowed down by the browser, which would give a false low reading.
- Check your settings: If the result is lower than your monitor’s rating, check the refresh rate in your system display settings first.
- Related tools: Use the Dead Pixel Test to check the screen’s pixels as well.