What this test can tell you
The page estimates the interval between browser animation callbacks, displays a representative rate and shows a moving pattern for comparison.
The rate is browser-observable timing, not a certified measurement of panel Hz or game FPS. Scheduling, power saving, variable refresh and background activity can change it.
How to use it
- Open the page and wait two seconds for the measurement.
- Compare the result with your monitor’s advertised rate (60, 120, 144, 165 or 240 Hz).
- Watch the motion test: higher refresh rates look smoother and less blurry.
Why your result may be lower
If you bought a 144 Hz monitor but see 60 Hz, the display is often set to 60 Hz in system settings, connected with an older cable or port, or the browser is limited by battery saver. On Windows open Settings → Display → Advanced display; on macOS open Displays → Refresh rate.
Not working? Try these fixes
It shows 60 Hz on my 144 Hz monitor
Set the refresh rate in your system display settings, use DisplayPort or a high-speed HDMI cable, and update your graphics driver. Multi-monitor setups may run the browser at the lowest rate.
The number keeps changing
Close heavy tabs and apps. Variable refresh (FreeSync, G-Sync, ProMotion) can also vary the rate when little moves on screen.
My phone shows 60 Hz, but it supports 120 Hz
Many phones lower the rate in battery saver mode or for browsers. Disable power saving and set the display to its high refresh mode.
Frequently asked questions
What is a good refresh rate?
60 Hz is standard. 120–144 Hz feels clearly smoother for scrolling and gaming; 240 Hz and more matters mainly for competitive games.
Is refresh rate the same as FPS?
No. Refresh rate is how often a display updates; FPS describes rendered or delivered frames. This page estimates browser animation timing. Scheduling, power settings, variable refresh and browser limits can make it differ from the panel’s configured rate.