🖥 See how many times per second your screen really refreshes.
The test starts on its own. Leave this tab open and in front for a few seconds and it measures your display's refresh rate in Hz, your frames per second, and how steady each frame is. Use Full Screen for the cleanest reading.
Motion smoothness check
Watch the bar as it crosses the lane. On a smooth display it glides without stuttering or doubling. Try a faster speed to make problems easier to see.
Refresh Rate Quick Reference for Gamers: Hz, Frame Time and Typical Use
Every refresh rate has a fixed time per frame. Higher rates draw frames more often, which makes motion look smoother and cuts the delay before a new frame appears.
| Refresh rate | Time per frame | Typically found on |
|---|---|---|
| 60 Hz | 16.67 ms | Standard monitors, TVs and many laptops |
| 75 Hz | 13.33 ms | Budget gaming and office monitors |
| 90 Hz | 11.11 ms | Some phones, tablets and VR headsets |
| 120 Hz | 8.33 ms | Many phones, tablets, TVs and gaming consoles |
| 144 Hz | 6.94 ms | Popular gaming monitors |
| 165 Hz | 6.06 ms | Gaming monitors and gaming laptops |
| 240 Hz | 4.17 ms | Competitive and esports-focused monitors |
| 360 Hz | 2.78 ms | High-end esports monitors |
What Is a Screen Refresh Rate Test?
A refresh rate test measures how many times per second your display draws a new image, in hertz (Hz). A 60 Hz screen refreshes 60 times a second, a 144 Hz gaming monitor 144 times. The test above asks your browser for a new frame every time the screen refreshes and times the gaps between them, which gives you a live Hz reading, your frames per second, and a picture of how steady each frame is.
How the test measures your screen
Browsers draw a new frame in step with the display, so the time between frames is the time between refreshes. The test takes the middle value of the last 120 frame times and converts it to Hz, which stops a few slow frames from throwing the number off. It also records your slowest and fastest frames, counts frames that arrived noticeably late, and works out your 1% low, the frame rate of the worst one percent of frames.
Reading the numbers
- Hz is how fast your screen refreshes. This is what you'd compare with your monitor's advertised rate.
- Average FPS in this test should land very close to the Hz, because the page draws one frame per refresh.
- 1% low FPS and dropped frames show smoothness. A big gap between your average and your 1% low means uneven frame delivery, which you feel as stutter.
When a 144 Hz monitor shows 60 Hz
This is the most common surprise. The monitor can run at 144 Hz, but the computer may be sending 60. Check that the refresh rate is actually selected in your operating system's display settings, and that your monitor is plugged into the graphics card rather than the motherboard. An older HDMI cable or port can also cap the rate, and a DisplayPort cable is the usual fix. Laptops on battery saver often drop the rate to save power, and the browser only measures the screen it is on, so check the window is on the right monitor.
Changing your refresh rate
On Windows, open Settings, go to System, then Display, then Advanced display, and pick a higher rate from the refresh rate menu. On a Mac, open System Settings, choose Displays, and set the refresh rate there. Graphics control panels from NVIDIA and AMD offer the same option. Run the test again afterwards to confirm the change.
Quick answers
Hz is how often the screen refreshes, and FPS is how many frames the computer produces each second. A game can run at 200 FPS on a 144 Hz screen, but you only see 144 refreshes a second. In this test the page draws one frame per refresh, so the two numbers match.
The most likely cause is that your display is set to 60 Hz in the operating system, or a cable or port is limiting it. Check your display settings, use a DisplayPort or a high-speed HDMI cable, and plug the monitor into your graphics card.
It can. With variable refresh rate the screen may adjust its speed to match what is being drawn, so the reading can move around instead of sitting on one number. Check the Hz stays close to your monitor's maximum while the test runs.
Higher rates make motion look smoother and reduce the delay before a new frame appears, which many players notice in fast games. The gain gets smaller as the rate rises, and you need a computer that can produce enough frames to use it.