Monitor Hz Detector
Detect your actual screen refresh rate in 3 seconds. No software needed, works in any browser.
What Is Monitor Hz?
Hz (hertz) is your monitor's refresh rate, meaning how many times per second your screen updates the image. A 60Hz monitor refreshes 60 times per second. A 144Hz monitor refreshes 144 times per second. Higher Hz means smoother motion, lower input lag, and a more responsive feel in games.
How to Use the Monitor Hz Detector
Click Detect My Hz
Wait 3 seconds while the tool counts your screen refresh cycles
See your detected refresh rate
Compare it to your monitor's advertised spec
Monitor Hz Comparison
| Refresh Rate | Frame Time | Best For |
|---|---|---|
| 60Hz | 16.7ms | Office work, casual use |
| 75Hz | 13.3ms | Budget gaming monitors |
| 120Hz | 8.3ms | Console gaming, mid-range |
| 144Hz | 6.9ms | PC gaming, esports |
| 165Hz | 6.1ms | High refresh gaming |
| 240Hz | 4.2ms | Competitive esports |
| 360Hz | 2.8ms | Pro tournament play |
Why Is My Detected Hz Lower Than Expected?
If your monitor is rated at 144Hz but the detector shows 60Hz, check these things: your GPU cable (HDMI 1.4 caps at 60Hz for high res, use DisplayPort), your Windows display settings (right click desktop, Display Settings, Advanced Display, set refresh rate manually), and whether your GPU drivers are updated.
Frequently Asked Questions
How do I check my monitor refresh rate?
Use the Monitor Hz Detector on this page. It measures your actual screen refresh rate using requestAnimationFrame in your browser. You can also check in Windows by right-clicking the desktop, selecting Display Settings, then Advanced Display.
What is the difference between Hz and FPS?
Hz is your monitor's refresh rate (hardware limit). FPS is how many frames your GPU produces per second. If your GPU produces 200 FPS but your monitor is 60Hz, you only see 60 frames per second. They need to match for best performance.
Is 144Hz worth it over 60Hz?
For gaming yes, especially fast-paced games. The difference in smoothness and input lag is clearly noticeable. For office work and video watching, 60Hz is sufficient.