Monitor Refresh Rate Test

Check how many frames your screen can deliver in real time.

The test samples the animation frame timing in your browser to estimate your display's refresh rate.

The test samples the animation frame timing in your browser to estimate your display's refresh rate.

Running

Starting measurement

Live estimate

Hz
0 Hz

Updated each frame for a quick impression.

Final reading

Hz
– Hz

Waiting for a stable window of frames.

Smoothness

0%

Lower timing jitter means smoother motion.

Frames sampled

0

Stability window

0

What this tool does

The monitor refresh-rate test estimates how consistently the display updates by measuring browser frames. The value is derived from render timing while the tab is visible.

How to use the tool

  1. Start the test and keep the tab visible during measurement.
  2. Wait until the display has stabilized.
  3. Restart the test or compare another display setting when you need a second estimate.

Useful applications

  • Making an initial plausibility check of a display refresh rate.
  • Comparing monitors or display settings.
  • Observing a web animation or demo under different conditions.

Notes and limitations

  • Background tabs, browser throttling, power-saving modes, and system load can affect the result.
  • The value is a browser estimate and does not replace dedicated hardware or system measurement.

Frequently asked questions

Why does the result not exactly match the monitor specification?

The tool measures browser render timing rather than the monitor signal itself. Visibility, throttling, and system load affect the estimate.

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