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Motion & Timing

Refresh Rate Test

Measure your real refresh rate and watch a moving reference.

…Hz

Measured from animation frames

▶ Start full-screen testTap for controls · Esc to exit

How to use

  1. 1Click Start — the measured refresh rate appears within a second or two.
  2. 2Watch the moving box to confirm motion looks smooth.
  3. 3Compare the reading to your panel's rated Hz; the line under it gives the frame time and the closest standard rate.
  4. 4Press Esc to exit.

FAQ

Why isn't the reading exactly my monitor's rating?

Many displays run a fraction off their nominal rate, such as 59.94 Hz instead of 60, and browser timing adds a little noise. A reading within about 1 Hz of the rating is normal. A large gap usually means a lower refresh rate is selected in your OS display settings.

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

Because the panel is being driven at 60 Hz. The usual causes: the refresh rate was left at 60 in Windows or macOS display settings, the cable or port can't carry the higher rate at your resolution (use DisplayPort or a high-speed HDMI cable), or a power-saving mode on a laptop or phone has lowered it. Fix that, then run the test again.

What do frame time and closest standard rate mean?

Frame time is how long each refresh lasts: 1000 ms divided by the rate, so 16.67 ms at 60 Hz and 6.94 ms at 144 Hz. The closest standard rate names the common panel setting your reading matches, which helps when the measurement lands a fraction off.

Tips

  • Close other tabs and apps; background load can drag the measured rate below your panel's rating.
  • If you bought a high-refresh monitor, make sure the rate is actually selected in your OS display settings.

Related tests

Ghosting TestMoving boxes at selectable speeds to reveal ghosting and trails.Open test→Screen Tearing TestFast scrolling bars that reveal tearing without V-Sync/VRR.Open test→Frame Skipping TestOne cell per frame — photograph it to catch a screen that drops frames.Open test→

Related guides

Learn more about what this test reveals and how to act on the results.

Refresh Rate Explained: 60 vs 120 vs 144 vs 240HzWhat Hz actually means, where the jump from 60 to 144 is most noticeable, and how to confirm your screen runs at the rate you paid for.Why Is My Screen Flickering? Causes and FixesVisible flicker usually comes from a cable, the refresh rate, adaptive sync, a driver or a failing backlight. Here's how to work out which one you have.How to Enable Your Monitor's Full Refresh Rate (Windows & Mac)Bought a 144Hz monitor but it still feels like 60? It probably is. Here's the two-minute fix in Windows and macOS, plus the cable to check.Response Time vs Input Lag: They're Not the SameOne is how fast pixels change; the other is how long until your click reaches the screen. Both affect how a display feels, in different ways.