LIVE DISPLAY DIAGNOSTICS

Refresh Rate Test – Check Your Monitor Hz

Measure your screen refresh rate online and see whether your display is currently running at 60Hz, 120Hz, 144Hz, 165Hz, 240Hz or another mode.

● requestAnimationFrame● Runs entirely in your browser — no upload or external API.

Measuring your display…

--Hz

—

FPS--

Frame time-- ms

Minimum--

Maximum--

Stability--%

Samples0

Frame time history— ms

Keep this tab visible and move the browser window onto the monitor you want to test.

Online refresh rate checker

A monitor refresh rate describes how many times the display can update each second. 60Hz means up to 60 refreshes per second, while 120Hz or 144Hz can make motion appear smoother when the rest of the system keeps up.

How to check your monitor refresh rate

Leave this page in the foreground for a few seconds. The checker collects frame intervals and stabilizes the result automatically. For the best result, close heavy background tabs and test the browser on the specific monitor you want to check.

60Hz vs 120Hz vs 144Hz

Higher refresh rates reduce the time between display updates: about 16.67 ms at 60Hz, 8.33 ms at 120Hz and 6.94 ms at 144Hz.

FRAME TIMING REFERENCE

Understanding the result

A reading close to 60, 75, 90, 120, 144, 165 or 240 Hz usually means that mode is active. Small variations such as 143.9 Hz are normal.

60Hz16.67 ms

75Hz13.33 ms

90Hz11.11 ms

120Hz8.33 ms

144Hz6.94 ms

165Hz6.06 ms

240Hz4.17 ms

360Hz2.78 ms

Why is my result lower than expected?

Check your operating-system display settings, monitor menu, cable or adapter limits, GPU settings, power-saving mode and browser tab visibility. A 144Hz monitor can still run at 60Hz when the higher mode is not selected.

FAQ

Frequently asked questions

What is my monitor refresh rate?+

The large Hz value above is the browser-based estimate of your current active refresh cadence.

Is this refresh rate test accurate?+

It is useful for confirming common modes such as 60Hz, 120Hz and 144Hz. Browser scheduling, VRR and system load can cause small variations.

Why does my 144Hz monitor show 60Hz?+

The display may be configured to 60Hz in the operating system, GPU control panel or the monitor itself. Cable and adapter limits can also prevent higher modes.

Can I test a second monitor?+

Yes. Move the browser window fully onto the second monitor and press Restart test.