Bought a 144 Hz or 240 Hz monitor? This test shows the refresh rate your screen is really running at right now, measured in your browser. Many high-refresh monitors run at 60 Hz by mistake because of a setting or the wrong cable — this test tells you in two seconds.
How to check your refresh rate
- Open this page on the screen you want to test (drag the browser window there and reload).
- Wait 2–3 seconds — the big number shows your refresh rate in Hz.
- Watch the moving block: at high Hz it should glide smoothly.
- If the number is lower than your monitor's rating, follow the tips below.
What the results mean
- Refresh rate (Hz): how many times per second the screen draws a new picture. 60 Hz is standard; 120–240 Hz feels much smoother.
- Frame time: the time between two frames — 16.7 ms at 60 Hz, 6.9 ms at 144 Hz, 4.2 ms at 240 Hz.
- Skipped frames: frames the browser could not draw in time. A few are normal; many mean the computer is busy.
Why your high-Hz monitor might show 60 Hz
Windows and Mac often start new monitors at 60 Hz. Older HDMI cables and ports may not carry 144 Hz at full resolution — DisplayPort or a newer HDMI 2.0/2.1 cable usually does. Laptops in battery-saver mode also lower the refresh rate.
Not working? Try this
- Windows: Settings → System → Display → Advanced display → Choose a refresh rate.
- Mac: System Settings → Displays → Refresh rate.
- Use DisplayPort or an HDMI 2.0/2.1 cable that supports your monitor's Hz.
- Plug the laptop in and turn off battery saver — it can limit the refresh rate.
- Browser limits: turn on hardware acceleration in your browser settings; some browsers cap animations at 60 Hz.
Frequently asked questions
How do I check my monitor refresh rate?
Open this page on that monitor. The large number shows the refresh rate in Hz within a few seconds.
Why does my 144 Hz monitor show 60 Hz?
The refresh rate is probably set to 60 Hz in display settings, or the cable or port can't carry 144 Hz. Change the setting and use DisplayPort or HDMI 2.0+.
Is the result accurate?
Yes, it measures the real time between frames drawn by your browser. Close other heavy apps for the most stable result.
Does it work on phones?
Yes. Many phones show 90 or 120 Hz; in battery-saver mode they may drop to 60 Hz.
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