FPS Test

How to use the FPS test

1. Open the page and wait about five seconds. The FPS test starts by itself.
2. Read the big number: that is your current frame rate. The average settles after a few seconds.
3. Watch the three moving squares. The top one moves once per frame at your full frame rate; the others are held to 30 and 15 fps for comparison.
4. Look at the graph. A flat line means smooth frames; tall spikes are stutters, which are also counted as dropped frames.
5. Use Full screen for the cleanest reading, and close other heavy tabs or apps if the number jumps around.

What the results mean

In a browser the frame rate is capped by your screen's refresh rate, so the FPS test is really measuring how many frames your system manages to show per second, up to that limit:

• About 60 FPS: a normal 60 Hz screen running smoothly. Most laptops, phones and office monitors are 60 Hz.
• About 120, 144, 165 or 240 FPS: a high refresh rate screen that is working at its full rate.
• Well below your screen's rate (for example 40 FPS on a 60 Hz screen): the browser is struggling. Battery saver, a busy CPU or GPU, or many open tabs are common causes.
• Exactly 30 FPS: often a power-saving mode, a low-power phone mode or a remote desktop session.

A few dropped frames when the page first loads is normal. Regular spikes in the graph point to stutter that you would also feel in games and video.

FPS vs refresh rate

FPS (frames per second) is how many new images your computer draws each second. Refresh rate (Hz) is how many times per second your screen can show a new image. You only see the lower of the two: a game running at 200 FPS on a 60 Hz monitor still looks like 60, and a 144 Hz monitor showing a game at 50 FPS looks like 50.

Because browsers sync animation to the display, this frame rate test also shows your likely refresh rate. If you paid for a 144 Hz monitor but the test shows 60, the monitor is probably set to 60 Hz in your display settings, or the cable cannot carry the higher rate. For the exact figure, use the refresh rate test.

Can this test my FPS in games?

No website can read the frame rate of a game running outside the browser. For games, use the built-in counter in Steam (Settings > In-game > FPS counter), the Xbox Game Bar on Windows (Win+G > Performance), or your graphics driver overlay. This page checks your screen, browser and graphics pipeline, which is useful to confirm smooth output before you blame a game.

Common problems and fixes

FPS is stuck at 60 on a 120 Hz or 144 Hz monitor

On Windows open Settings > System > Display > Advanced display and choose the highest refresh rate. On a Mac open System Settings > Displays > Refresh rate. Use a DisplayPort or HDMI 2.0+ cable, and make sure the browser window is on the high refresh monitor.

FPS is low or keeps dropping

Plug in your laptop and turn off battery saver, close heavy tabs and apps, and check that hardware acceleration is on in your browser settings (Chrome: Settings > System > Use graphics acceleration when available).

FPS is capped at 30

Low power mode on iPhone and power saving on many Android phones limit browsers to 30 FPS. Turn it off and test again. Remote desktop and screen sharing can also cap the rate.