Frame Rate Test Tool

What FPS actually means

FPS (frames per second) is how many distinct images your browser managed to draw in one second. In games and video, higher FPS usually feels smoother because motion is broken into finer steps. On a 60 Hz monitor you typically top out around 60 FPS—the display simply cannot show more unique frames than its refresh rate allows, even if the browser is busy. A smooth result depends on your browser, your graphics hardware, and the monitor's refresh rate working together. If you just bought a 120 Hz or 144 Hz display, this test is a quick way to confirm the higher refresh rate is actually enabled in your system settings.

Frame time vs FPS

Frame time is the gap between two consecutive frames, in milliseconds. At a steady 60 FPS you are looking at about 16.7 ms per frame; at 120 FPS it is roughly 8.3 ms. People often care more about frame time than a single FPS number because stutters show up as occasional long frames—even when the average FPS still looks fine. A flat frame-time line feels better than a high average that keeps spiking. Watch the history graph for tall spikes: those slow frames are what you notice as stutter while scrolling, watching video, or gaming. Comparing the min and max values also shows how consistent your system is under load.

What counts as "good"?

• Around 15 FPS — very choppy. Fine for spotting stutter in a comparison, but motion looks laggy for everyday use.
• Around 30 FPS — usable for casual browsing and many videos, but motion can look soft or slightly laggy.
• 60 FPS — the everyday smooth target for most screens and UI work.
• 120 FPS and up — sharper motion on high-refresh panels (games, fast scrolling), if GPU, browser, and monitor can keep up.
• 240 FPS — top-end feel on high-refresh gaming displays. Most screens cannot show this many unique frames; use it mainly to compare against lower rates in this tool.