144 Hz gaming monitor
The first step up from 60 Hz that most players notice.
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Refresh Rate Test: How Many Hz Is Your Screen?
Find out how many frames per second your browser really draws and whether your monitor is running at the rate you paid for. It takes 4 seconds and runs entirely on this page.
Measured – Hz · Nearest common rate – · Frame time – ms · Slow frames –
Press the button and keep this tab in view for 4 seconds.
The box moves at a fixed speed. Smooth motion with no stutter is what you want to see.
Runs in your browser. Nothing leaves this page.
Quick answer
Press Measure and keep the tab in view for 4 seconds. The result is the Hz your browser painted, plus the frame time and any slow frames. If it reads 60 on a 144 Hz monitor, check your display settings before blaming the monitor.
How to use the Refresh Rate Test
Close heavy tabs
Video, games and other busy tabs can pull the number down. Plug laptops in, because battery saver modes cap the rate.
Press Measure
Keep this tab in front for 4 seconds. Watch the box: it should glide, not stutter.
Compare with your settings
Match the result to the rate set in Windows, macOS or your console, then follow the fixes below if it is lower.
How the refresh rate test works
Your browser asks the screen for a new frame with requestAnimationFrame, which fires once for every frame it can draw. The test records the time of about 240 of those calls, takes the median gap between them and converts it to Hz (1000 divided by the gap in milliseconds). It then shows the nearest common refresh rate and counts frames that took half again as long as normal.
This is a measurement of the browser, not a hardware read-out. A 144 Hz monitor driven at 60 Hz will read 60, and a throttled background tab will read low. Nothing is uploaded or stored.
What your result means
Common rates and the time each frame stays on screen:
| Refresh rate | Frame time | Typical use |
|---|---|---|
| 60 Hz | 16.7 ms | Default for most office monitors, laptops and TVs. |
| 120 Hz | 8.3 ms | Common on phones, newer TVs and consoles that support it. |
| 144 Hz | 6.9 ms | Entry gaming monitors. |
| 240 Hz | 4.2 ms | Fast esports-style monitors; see our 144 vs 240 Hz guide. |
If the number is lower than your monitor's rate, the usual cause is the setting, not the hardware.
Reading lower than your monitor's rate?
| Likely cause | What to check |
|---|---|
| Display set to 60 Hz | Windows: Settings → System → Display → Advanced display → Choose a refresh rate. macOS: System Settings → Displays → Refresh Rate. |
| Wrong cable or port | Use the DisplayPort cable or an HDMI cable and port rated for the mode; see our HDMI vs DisplayPort guide. |
| Power saving | Plug in the laptop and switch off battery saver; some browsers cap animation on battery. |
| Browser or tab load | Close heavy tabs, try another browser, and measure with this tab in front. |
| Variable refresh | With VRR the screen can lower its rate when the picture is simple, so a lower reading can be normal. See what VRR does. |
Gear that helps
Category searches on Amazon, picked because they relate to what this tool checks. Compare options and read the listing before you buy.
DisplayPort cable for gaming monitors
A cable that is not rated for the mode is a common reason a monitor will not reach its top rate.
Search on Amazon240 Hz gaming monitor
For fast shooters on a PC that can push very high frame rates.
Search on AmazonAmazon Associates affiliate links: we earn from qualifying purchases. See our affiliate disclosure.
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Frequently asked questions
How do I check my refresh rate?
Press Measure on this page and keep the tab in view for 4 seconds. The result is the Hz your browser draws. You can also read the set rate in your display settings.
Why does my 144 Hz monitor show 60 Hz?
Most often the display is set to 60 Hz in Windows or macOS, or the cable or port cannot carry the higher rate. Check the refresh rate dropdown in your display settings first.
Is the result exact?
No. It is the median over a few seconds and the browser can be throttled, so expect a small spread. The nearest common rate is the number to compare with your settings.
What are slow frames?
Frames that took more than 1.5 times the normal gap. A few are normal; many suggest a busy tab or a power-saving mode.
Does variable refresh rate change the result?
It can. A VRR display may lower its rate to match what is drawn, so a reading below the maximum is not necessarily a fault.
Will it work on a phone?
Yes, but many phones and browsers cap web animation, so the page may read lower than the panel's top rate.
Is anything uploaded?
No. The test runs in your browser and stores nothing.
This article reflects independent editorial research and disclosed buying criteria, not hands-on lab testing or manufacturer sponsorship. Some links on this page are Amazon Associates affiliate links; see our affiliate disclosure.