Test your display refresh rate and measure real-time frame timing directly in your browser.
Measure your display's frame timing and estimate its effective refresh behavior.
Click Start Test and keep this page visible while the measurement runs.Balanced refresh-rate measurement for general display evaluation.
Aggressive 15% outlier filtering to isolate true hardware timing.
Optimized visual test for observing frame pacing and screen tearing.
Learn how display refresh rate works, how browser-based testing estimates frame timing, why refresh rate and FPS are different, and how to interpret your results.
The refresh rate of a display describes how many times per second the panel completely redraws its raster grid. Measured in Hertz (Hz), a higher refresh rate shortens the physical duration each image stays on screen before being replaced by the next frame.
FPS (Frames Per Second) measures how many discrete frames your GPU produces. Refresh Rate (Hz) measures how frequently your physical monitor cycles its pixels.
If your graphics card renders 200 FPS on a 60Hz display, the monitor physically discards 140 of those frames, displaying only 60.
Web browsers expose requestAnimationFrame, which fires right before each hardware vertical blanking interval (VSync).
By collecting hundreds of consecutive microsecond timestamps using performance.now(), this tool applies statistical outlier filtering (median and trimmed mean) to compute your display's effective refresh frequency.
Frame time is the mathematical reciprocal of refresh frequency (time = 1000 / Hz). The lower the frame time, the less latency you experience between physical mouse movement and on-screen photon emission.
Frame pacing refers to the timing consistency between consecutive frame deliveries. A monitor may average 144Hz, but if frames arrive unevenly (e.g. 4ms then 12ms then 5ms), the visual experience will appear micro-stuttered.
Standard 60Hz displays will output frame times hovering right around 16.67ms with an estimated rate between 59.8Hz and 60.2Hz. Keep background video playback paused for optimal measurement.
Common on modern smartphones, tablets, and Apple ProMotion displays. Frame delivery targets 8.33ms. Verify your OS Display Settings have 120Hz selected rather than 60Hz.
Ensure you are connected via DisplayPort or HDMI 2.0+ and verify the Windows Advanced Display Properties show 144.00Hz. Measured frame intervals should center tightly at 6.94ms.
165Hz panels deliver frames every 6.06ms. Some monitors require enabling a display overdrive or overclocking toggle in the monitor's physical On-Screen Display (OSD) menu to unlock 165Hz.
High-end esports displays update every 4.17ms. Make sure hardware acceleration is active in your browser settings so your dedicated GPU compositor handles requestAnimationFrame.
Refresh rate, measured in Hertz (Hz), represents how many times per second your display hardware redraws the entire screen image. A 60Hz screen updates 60 times each second (every ~16.67ms), while a 144Hz panel refreshes 144 times each second (every ~6.94ms).
On Windows: open Settings → System → Display → Advanced display, and look for 'Choose a refresh rate'. On macOS: open System Settings → Displays and select your preferred frequency from the Refresh Rate dropdown.
60Hz is completely sufficient for standard web browsing, office document editing, and watching movies (which are typically filmed at 24 FPS or 30 FPS). However, 120Hz and 144Hz provide noticeably smoother scrolling, less eye fatigue, and faster mouse tracking.
Yes, significantly. 120Hz halves the frame interval from 16.67ms down to 8.33ms. This provides an immediate, tangible improvement in animation fluidness, cursor tracking, and reduction of motion ghosting.
For gaming and high-tempo PC interaction, absolutely. 144Hz delivers 2.4 times more frames each second compared to 60Hz. It reduces input lag and makes camera motion in 3D titles feel dramatically sharper.
Yes. Modern Chromium (Chrome, Edge, Brave) and WebKit browsers synchronize requestAnimationFrame callbacks with the operating system's display compositor at 240Hz and higher, provided your GPU driver and display cable support that frequency.
Browser tests measure JavaScript animation delivery intervals. Background applications, multi-monitor configuration conflicts, GPU power-management profiles, or non-focused browser tabs can momentarily delay event callbacks, introducing slight variance.
Refresh rate (Hz) is the physical speed of your monitor's display panel, whereas FPS (Frames Per Second) is the rate at which your graphics card and game engine render new image frames.
Yes. In fullscreen mode, the browser can bypass desktop window management (DWM) composition buffers, delivering more consistent frame timing and reducing scheduling jitter.
Yes. Browsers use VSync synchronization by design for requestAnimationFrame. This locks callback dispatch to your primary display's vertical sync interval, which is what allows browser-based refresh estimation.
No. This test only runs lightweight 2D canvas drawing routines in your browser and measures frame delivery intervals. It does not alter hardware voltages, overclock panel timings, or flash dangerous signals.
Measure frame timing and estimate your display's refresh behavior directly in your browser.
