Monitor refresh rate test
The measurement starts on its own: the browser counts how many frames the screen draws per second. Keep the tab open and still for a few seconds so the number settles.
How to useHow many Hz does your screen show?
Measuring…
Compare the smoothness
Each ball moves at the same speed but is redrawn at a different rate. Rates above your screen look the same as the highest one it can show.
Available in: 
Monitor refresh rate test: what it is for
The tool counts how many frames the screen draws per second and shows the refresh rate in Hz, rounded to the closest common rate. A live chart shows the time between each frame: a flat line means a stable screen, and red spikes are dropped frames.
To see the difference, balls move at the same speed but are redrawn at 15, 30, 60 and 120 frames per second and at your screen maximum.
How to use
- Open the page and wait a few seconds without moving.
- See the rate in Hz and the time per frame.
- Compare how smooth the balls look at each rate.
When to use it
- Check whether your 144 Hz monitor is really running at 144 Hz.
- See whether the cable or a setting is limiting the screen.
- Compare smoothness between phone, laptop and monitor.
Frequently asked questions
My monitor is 144 Hz, but the test shows 60. Why?
It is almost always a setting. On Windows, go to Settings > System > Display > Advanced display and choose the highest rate. Also check that the cable supports it (DisplayPort or HDMI 2.0 or newer) and that battery saver has not limited the screen.
What is a higher refresh rate good for?
With more frames per second, moving images look sharper and response time drops. The difference between 60 and 120 Hz shows when scrolling pages and in games. Above 144 Hz it is mostly noticed by competitive gamers.
Is it really free?
Yes, 100% free. No sign-up, no subscription and no usage limits. All Tools123 are free.