Checker Vdisplay Hz

Fast, accurate and free online checker vdisplay hz tool running directly in your browser.

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Result

verdict: 60Hz+ confirmed pass: 1 hz: 59.94 nearest: 59.94 threshold: 60 duration: 4000 stability: Stable display: vDisplay Hz Checker Report ------------------------- Estimated refresh rate: 59.94 Hz Nearest common mode: 59.94 Hz Threshold: 60 Hz Verdict: PASS (≥ 60 Hz) Stability: Stable Frame timing (ms): median: 16.6833 mean: 16.7051 std: 0.2214 p5: 16.6000 p95: 16.9000 Samples: 240 frames Test duration setting: 4000 ms Measured at: 2026-02-23T12:00:00.000Z How the estimate is calculated: 1) The browser records timestamps for animation frames. 2) It computes the median frame interval (ms). 3) Hz is estimated as 1000 / median_ms. Notes: - Keep the tab active; background tabs may be throttled. - System load and VRR can introduce timing variation.

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Monitor Hz Tester - Check your actual refresh rate

TheMonitor Refresh Rate Tester measures the actual number of Hz (frames per second) displayed by your monitor using a JavaScript requestAnimationFrame. Check whether the monitor operates at the declared 60 Hz, 120 Hz, 144 Hz or 240 Hz.

What is monitor refresh rate?

Refresh rate (Hz) is the number of times per second that the monitor updates the displayed image. 60 Hz = 60 frames per second (fps) - standard for most monitors, 120 Hz - smoother image, popular in premium smartphones, 144 Hz - standard for gaming monitors, 165 Hz, 240 Hz, 360 Hz - high refresh rate for e-sports. Higher Hz = smoother image and lower input lag, which is especially important in computer games and e-sports.

How to measure monitor Hz via JavaScript?

requestAnimationFrame (rAF) is a browser API that invokes a callback before each screen refresh. The tool uses it to measure:let frames = 0; let lastTime = performance.now(); function measure(time) { frames++; if(time - lastTime >= 1000) { console.log(frames + 'Hz'); frames = 0; lastTime = time; } requestAnimationFrame(measure); } requestAnimationFrame(measure);. The measurement is performed over a few seconds for accuracy - the result is the average Hz of multiple samples. Online measurement is accurate for systems without VSync or dynamic refresh.

Dynamic Refresh - VRR, G-Sync, FreeSync

VRR (Variable Refresh Rate)- technology that synchronizes monitor refresh with the FPS of the graphics card: G-Sync (NVIDIA, requires a certified G-Sync or G-Sync Compatible module), FreeSync (AMD, open standard, most monitors), HDMI 2.1 VRR (for PS5, Xbox Series consoles). The tester measures the current Hz - if you have VRR enabled, the result may vary.OLED with High Refresh Rate: New OLED panels (LG, Samsung OLED) offer 120-240 Hz with better colors than IPS.

How to check and change the monitor Hz in the system?

Windows 11/10: Settings → System → Display → Advanced display settings → Refresh rate. or: right-click desktop → Display settings → Advanced settings.Note: the monitor may support 144 Hz but be set to 60 Hz - please change in system settings! macOS: System Settings → Displays → select Hz. Online tester verifies the actual value after setting.

Frequently asked questions

How to check how many Hz my monitor has in Windows?

Method 1: Right click on the desktop → Display Settings → Advanced Display Settings → "Refresh Rate" shows the current value. Method 2: DirectX Diagnostic Tool (dxdiag.exe) → "Display" tab → "Refresh Rate". Method 3: GPU-Z or HWiNFO → monitor info. Online method: Our tester measures actual Hz via JavaScript - checks whether the system setting actually works.

Why does my 144 Hz monitor only show 60 Hz?

Possible causes: Windows setting still at 60 Hz (change in display settings), DisplayPort/HDMI cable does not support higher Hz - DP 1.2 supports 144 Hz at 1080p, HDMI 1.4 max 120 Hz at 1080p, HDMI 2.0 up to 144 Hz at 1080p/60 Hz at 4K, wrong cable or port (check cable specification), the graphics card does not support 144 Hz at this resolution, the monitor requires setting in the OSD (On-Screen Display).

Does a higher Hz monitor affect gaming performance?

Yes, significantly: 60 Hz max 60 FPS visible frames, 144 Hz max 144 FPS - a clear difference in smoothness, 240 Hz - minimal input lag (approx. 4 ms vs 16 ms at 60 Hz). Practically: the difference of 60→144 Hz is visible to the naked eye, 144→240 Hz is a smaller difference, visible mainly in e-sports. Important: the graphics card must generate the appropriate number of FPS - 144 Hz without 144 FPS in the game works like 60 Hz (the same number of unique frames).

What is input lag and how does Hz reduce it?

Input lag is the time between a key press/mouse movement and the visible response on the screen. It consists of: monitor delay (frame display time = 1/Hz second), monitor processing delay (pixel response time), system delay (GPU, CPU, USB polling). At 60 Hz: 16.7 ms per frame. At 144 Hz: 6.9 ms per frame. At 240 Hz: 4.2 ms per frame. For esports players, every millisecond matters - hence the popularity of 240 Hz and 360 Hz monitors.

How to check monitor Hz via JavaScript in browser?

Simple implementation:let count = 0; let start = performance.now(); function frame(t) { count++; if(t - start < 1000) { requestAnimationFrame(frame); } else { console.log('Hz: ' + Math.round(count * 1000 / (t - start))); } } requestAnimationFrame(frame);. Paste in DevTools Console and check the result after 1 second. Our tester automates this and shows the result in the UI.