Refresh Rate Test

Find out the real refresh rate of your monitor, laptop, or phone screen. The test counts animation frames over a few seconds and works out the gap between them, then reports the rate in hertz - 60, 120, 144, whatever your panel runs at. Useful for checking that a high-refresh monitor is actually running at its rated speed (a cable or a display setting can quietly drop a 144 Hz panel to 60), comparing two screens, or confirming a setup change took effect. It also shows the average, the slowest and fastest frames, and how many frames it sampled. Runs entirely in your browser - nothing is uploaded.

Tech

Measure how many times per second your display repaints.

The test counts animation frames over 4 seconds and works out the gap between them. A steady 60 Hz panel paints a frame every 16.7 ms, a 120 Hz panel every 8.3 ms, and so on. The headline number is the median rate, so one slow frame won't throw it off.

Browsers cap animation frames at the display's refresh rate, so this measures the screen, not your graphics card's raw output. Background throttling, an unfocused tab, or a busy machine can pull the reading below your panel's real rate - run it again on an idle, focused tab for the truest result.

What the number means

Refresh rate is how many times a second your display redraws the picture, measured in hertz. A 60 Hz screen paints 60 frames a second, one every 16.7 ms. A 144 Hz screen paints one every 6.9 ms, so motion looks smoother. The test times the gaps between actual frames your browser renders and turns that into a rate.

Why it might read low

Browsers tie animation frames to the display's refresh, so this measures the screen rather than your GPU's raw output. If the reading is below your panel's rating, the tab may be unfocused or throttled, the machine busy, or the display set to a lower rate in the OS. Close other tabs, keep this one focused, and run it again for the truest result.

Checking a high-refresh setup

Buying a 144 or 165 Hz monitor doesn't guarantee you're getting it. The wrong cable, a port that maxes out lower, or a Windows or macOS display setting left at 60 Hz will all cap you without any warning. Run the test, and if it reads 60 on a high-refresh panel, check the display settings and the cable before assuming the screen is fine.

Nothing leaves your device

The test just counts frames your browser is already drawing. No camera, no upload, no tracking - close the tab and it's gone.