Monitor Hz Test
Check Your Display Refresh Rate
Measure your display's physical refresh rate with microsecond-level accuracy. Built with native requestAnimationFrame callback hooks. Verify frametime stability and check for skipped frames.
🏆 Display Performance Tiers
What is Monitor Refresh Rate (Hz)?
The physical refresh rate of your display, measured in Hertz (Hz), indicates how many times per second the panel updates its physical color pixels with new incoming frames from the graphics card. For instance, a standard 60Hz monitor refreshes its output image 60 times a second, whereas a professional-grade 144Hz, 240Hz, or 360Hz gaming display updates the screen up to several hundred times per second.
Our precision engine leverages the native web interface timer requestAnimationFrame, measuring V-Sync callbacks directly synchronized with your display hardware's vertical rasterizer scan cycles. With raw performance logging down to sub-millisecond accuracy using performance.now(), our tool can check for microsecond variances in hardware timing buffers, filtering rendering bottlenecks to extract your true physical panel parameters.
Frametime (ms) = 1000ms ÷ Refresh Rate (Hz)Example: 144Hz Display = 6.94ms frame interval duration
Most consumer panels deploy standard settings, but graphics processors sometimes do not deliver their full frequency potential in browser applications if GPU acceleration is missing or configured incorrectly in display control cards. Run a quick check using our suite to calibrate your configuration.
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How to Unlock Your Monitor's True High Refresh Rate
Check OS Properties
In Windows, open Settings → Display → Advanced Display. Ensure your high-Hz value is selected under the refresh rate rate menu, rather than defaulted to 60Hz.
Verify Display Cables
Older HDMI cables cannot carry enough bandwidth for 144Hz+ display resolutions. Utilize high-spec DisplayPort (DP 1.4+) or HDMI 2.1 cables directly to the GPU card.
Enable Hardware Acceleration
Without GPU engine access, browsers fall back to software composition, capping refresh results to 30Hz or 60Hz. Enable Hardware Acceleration in browser parameters.
Adjust GPU Panel Settings
Launch Nvidia Control Panel or AMD Software Adrenalin. Navigate to Resolution configurations, and check that standard PC dynamic rates are configured correctly.
Frame Skipping & Stability: What to Look For
Even if your display reports 144Hz or 240Hz physically, hardware control failures can result in frame drops or stuttering. This means individual frames are omitted entirely, reducing display fluidity down to standard desktop outputs.
Frametime Stability (Jitter)
While refresh rate is measured globally, individual frame rendering intervals vary based on engine efficiency. Our tool checks the standard deviation of frametime intervals (represented as Jitter in ms). High jitter rates produce visual stutters during mouse movements, even at higher refresh rates.
The Pursuit Camera Frame Skipping Test
When the calibration test is running, our dynamic sequencer bar flashes white blocks at your screen's precise timing frequencies. To capture physical frame skips:
- Set your camera shutter speed manually to a slow duration (e.g., 1/5 or 1/10 seconds).
- Take a photo of the moving canvas bar while it sweeps across the grid coordinates.
- If your monitor displays correctly without frame skipping, the photo will depict a contiguous, unbroken horizontal row of illuminated white blocks.
- If black spaces break up the illuminated pathway, your screen controller is actively skipping physical refresh frames.
The Difference Between FPS and Hz
Many computer users confuse system rendering speed (FPS) with monitor frequency capability (Hz). These dual metrics represent separate links in your system's hardware configuration chain:
Frame Rate (FPS)
The speed at which your GPU renders complete digital frames per second. Games can output 300+ FPS based on graphics card power and processing limits.
Display Refresh Rate (Hz)
The maximum physical display capacity of your screen panel. If your screen runs at 60Hz, it displays a maximum of 60 individual frame updates each second, even if your game operates at 300 FPS.
To synchronize display capacity with render speeds, gamers deploy VRR systems (Variable Refresh Rate) such as NVIDIA G-Sync or AMD FreeSync. These adjust your physical monitor rate dynamically to match your GPU's frame generation speed, reducing input latency and eliminating screen tearing.