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Refresh Rate Test – Check Your Monitor's Hz

Find your monitor's refresh rate (60, 120, 144, 165, 240 Hz and more), see frame times and dropped frames, and check motion smoothness.

  • Free, no sign-up
  • Runs in your browser, nothing uploaded

About the Refresh Rate Test

Measure the refresh rate your browser is actually running at, to confirm a 120 Hz, 144 Hz or 240 Hz monitor is set up correctly. Frame-time bars show any dropped frames.

Key features

  • Detects 60, 75, 120, 144, 165, 240 Hz and more
  • Measured frames per second
  • Frame-time graph with dropped frames in red
  • Motion smoothness check
  • Updates live as conditions change
  • No download needed

What's your monitor's refresh rate?

The refresh rate is how many times per second your screen updates, measured in hertz (Hz). Higher rates make motion look smoother and games feel more responsive. This test measures the rate your browser is actually drawing at.

Common refresh rates

Refresh rateFrame timeTypical display
60 Hz16.7 msStandard monitors, most laptops
75 Hz13.3 msBudget monitors
120 Hz8.3 msGaming laptops, phones, TVs
144 Hz6.9 msGaming monitors
165 Hz6.1 msGaming monitors
240 Hz4.2 msEsports monitors

If the number is lower than expected

  1. Set the refresh rate in your display settings.
  2. Use the right cable: high refresh rates often need DisplayPort or HDMI 2.0+.
  3. Plug in your laptop: battery saving can cap the rate.
  4. Enable hardware acceleration in your browser settings.

Screen resolution, dead pixel test, and reaction time test.

How to use the Refresh Rate Test

  1. Open the test. It's ready immediately, with nothing to install.
  2. Follow the on-screen prompt: click, type, press or watch as instructed.
  3. Read your results, which update live as you test.
  4. Repeat as often as you like. Results stay in your browser.

Frequently asked questions

Why does it show 60 Hz on my 144 Hz monitor?

Usually the refresh rate is set to 60 Hz in your operating system. On Windows, open Settings → System → Display → Advanced display and choose the higher rate. Also check you're using a DisplayPort or HDMI cable that supports it, and that the browser window is on that monitor.

Why does the result jump around?

Browsers can slow down to save power, especially on battery, and some laptops and phones switch refresh rates dynamically. Plug in, close other tabs and keep the window in focus for a steady reading.

What are dropped frames?

Frames the browser couldn't draw in time, shown as red bars. Occasional red bars are normal; frequent ones mean the computer is busy or the browser is being throttled.

Is this as accurate as a hardware tool?

It measures the rate the browser actually draws at, which matches your display's refresh rate in most setups. Variable refresh rate (G-Sync, FreeSync) and power-saving modes can make the browser draw at a different rate.

Are my camera and microphone recorded?

No. Audio and video are processed live in your browser and never uploaded. The only recording is the optional 5-second mic playback, which stays on your device and disappears when you leave the page.

Why does my browser ask for permission?

Browsers require your permission before any site can use your camera or microphone. You can revoke it at any time from the icon in the address bar.

Do these tests work on phones?

Most do: mic, webcam, speaker, screen, reaction time and click tests work on phones and tablets. The keyboard, mouse and gamepad testers need those devices connected.

Last updated:

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