Display
Refresh Rate Test
Test your monitor refresh rate in Hz. Check if your display is running at 60Hz, 120Hz, or 144Hz.
Live Result
Detecting…
What is it?
Your refresh rate is how many times per second your physical display updates with a new image, measured in Hertz (Hz). A 60Hz monitor updates 60 times a second. Our tool estimates this by measuring the timing of animation frames requested by your browser.
Why this matters
Higher refresh rates (like 120Hz or 144Hz) result in significantly smoother scrolling, more responsive animations, and better gaming performance. Developers need to know the refresh rate ceiling to optimize complex JavaScript animations.
Practical Use Cases
- Gamers verifying that their new 144Hz gaming monitor is actually configured correctly in their operating system.
- Web Developers determining if janky animations are caused by poor code performance or a low-refresh-rate display.
- Users checking if their laptop battery-saver mode has automatically throttled their screen down to 30Hz or 60Hz.
Common values
| Label | Value |
|---|---|
| Standard | 60 Hz |
| High refresh | 120 Hz |
| Gaming monitor | 144 Hz |
Troubleshooting
My 144Hz monitor shows up as 60Hz
You must manually enable the higher refresh rate in your Windows Display Settings or macOS System Preferences. It does not activate automatically out of the box.
Refresh rate fluctuates rapidly
This is an estimation based on browser performance. If your computer is heavily loaded, or you are running on battery power, the browser may drop frames, resulting in an inaccurate reading.
Frequently asked questions
How do I do a monitor refresh rate test?
Simply leave this page open for a few seconds. The tool will calculate the interval between screen repaints and display your estimated Hz.
Why is the refresh rate estimated?
While some modern browsers are beginning to expose the exact hardware refresh rate, most still keep it hidden. We estimate it by running a tiny animation loop and measuring the timing.
Related Tools
- FPSMeasure your browser frame rate using requestAnimationFrame.
- Screen ResolutionInstantly check your screen resolution in pixels. See your display width and height without installing software.
- GPU RendererCheck your graphics card model. Identify your GPU and WebGL renderer online without installing software.
Explore more diagnostics
Visit the DeviceScope homepage for a complete live dashboard, or browse all tools in the Display category.