120 FPS Test — Can Your Display Really Hit 120?
The current console and premium-phone standard: half the frame time of 60, clearly sharper tracking, and the rate ProMotion displays have taught laptop users to expect. The live test below measures your real delivery — aim for a steady average near 120 with frame times near 8.33 ms.
The meter starts automatically — no button needed. Keep this tab in front for a clean reading.
Your system (read locally, never uploaded)
Benchmark history
What a good 120 FPS result looks like
A healthy 120Hz setup shows three things in the meter above: an average within a frame or two of 120, a 1% low that stays within about ten percent of that average, and a frame-time graph that reads as a flat field of equal bars around 8.33 ms rather than a skyline. The average alone can flatter a broken setup — a display alternating between long and short frames can average 120 while feeling rough — which is why this test reports the lows and draws every frame. If your average is right but the graph is jagged, the stutter test is your next stop; if the average is stuck at exactly 60, skip ahead to the fix.
Who 120 FPS is for
Current consoles in performance mode, flagship phones, MacBook Pro and other ProMotion laptops, and 120Hz televisions. A 120 FPS result here means your whole chain — panel, cable, settings, browser — is healthy.
Why does my high-refresh monitor show 60?
This is the single most common problem this test uncovers: someone buys a 144Hz monitor, plugs it in, and Windows quietly keeps it at 60Hz. Work through the checklist in order. First, open your operating system display settings and set the refresh rate to the highest value listed — on Windows that is Settings, System, Display, Advanced display; on macOS it is System Settings, Displays, Refresh Rate. Second, check the cable and port: many older HDMI cables and some laptop docks cap out at 60Hz at higher resolutions, while DisplayPort or a certified high-speed HDMI cable carries the full rate. Third, plug laptops into power and turn off battery-saver mode, which commonly caps rendering at 60 or even 30 frames per second. Fourth, disconnect a second, slower monitor temporarily — mixed refresh rates can drag the compositor to the lowest common rate. Fifth, make sure hardware acceleration is enabled in your browser settings, and test in a second browser to rule out an extension. Run the test again after each change; the detected rate should jump the moment the real bottleneck is gone.
How to run this test
- Let the meter settle for five seconds — refresh detection needs a clean sample of frame times.
- Run the 30-second benchmark for a grade you can compare after changes.
- Add the Heavy stress load if you want to know whether 120 survives real work, not just an idle page.
- Change one setting at a time — refresh rate, cable, power plan — and re-run. The number that moves names the bottleneck.
Frequently asked questions
What does the 120 FPS test check?
It measures whether your browser, system and display can actually deliver 120 frames per second steadily — current and average FPS, 1% lows, frame time around 8.33 ms, and stutters — rather than trusting what the spec sheet claims.
What frame time is 120 FPS?
8.33 milliseconds per frame. Frame time is the reciprocal of frame rate, and it is the figure your eyes effectively feel: halving it is what every step up the refresh ladder buys.
My test shows 60 instead of 120 — why?
Almost always configuration, not capability: the operating system is set to 60Hz, the cable or dock cannot carry the higher rate at your resolution, battery-saver mode is capping rendering, or a second slower display is dragging the chain down. The stuck-at-60Hz guide walks through each fix in order.
Is 120 FPS worth it?
Current consoles in performance mode, flagship phones, MacBook Pro and other ProMotion laptops, and 120Hz televisions. A 120 FPS result here means your whole chain — panel, cable, settings, browser — is healthy. Whether it is worth it for you depends on content speed — the comparison lanes on the FPS test page let you see the difference at your own pace before spending anything.