Free · Real-time · 100% in your browser
What refresh rate is your screen really running?
Measure your monitor or screen's refresh rate in real time and find out instantly whether you're getting 60Hz, 90Hz, 120Hz, 144Hz, 165Hz, 240Hz — or higher.
- 60Hz
- 90Hz
- 120Hz
- 144Hz
- 165Hz
- 240Hz
- 360Hz+
Measured refresh rate
Current
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Average
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Stability
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Max
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Min
—
Dropped
0
Frame time (ms per frame)
0 frames
The browser renders in sync with the display this window is on. Values can be limited by browser VSYNC or OS compositing. For the most accurate reading, keep this tab focused and use Fullscreen.
Accurate like the pros, simple enough for anyone
Honest, not just a number
We show current, average, max, min and a stability score — plus a live frame-time graph — so you can trust the reading.
Dropped-frame detection
A display can accept 144Hz but fail to draw every frame. We flag skipped frames caused by cheap cables or adapters.
Private by design
Everything is measured locally in your browser. No sign-up, no ads, nothing uploaded to a server — ever.
Feel the smoothness
Watch the marker sweep across. On a higher-Hz display it looks noticeably smoother and leaves less motion blur.
Motion is paused because your system requests reduced motion.
Your display & device
Detected automatically in your browser. None of this leaves your device.
- Screen resolution
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- Browser viewport
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- Device pixel ratio
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- Color depth
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- GPU / renderer
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- Platform
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- Browser
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Frequently asked questions
How does a browser measure refresh rate?
We time the browser's requestAnimationFrame callbacks with a high-precision clock. Because the browser repaints in sync with your display, the number of frames per second maps directly to your monitor's Hz.
Why is my reading slightly below my rated Hz (e.g. 143.9 instead of 144)?
Tiny decimal differences are normal — displays rarely run at an exact round number, and browser timing has small overhead. Anything within ~1% of your rated rate means your display is working correctly.
Why does it say 60Hz when I have a 144Hz monitor?
Usually the high refresh rate isn't enabled in your OS display settings, a slow cable/port is limiting bandwidth, or a laptop is in battery-saver mode. See our troubleshooting guide for step-by-step fixes.
Can the browser or OS cap the result?
Yes. The browser renders in sync with the display the window is on, and browser VSYNC or OS compositing can cap it. Keep the tab focused, use Fullscreen, and move the window onto the display you want to test.
Does this work on phones and tablets?
Yes. Modern phones with 90Hz/120Hz ProMotion or 'Smooth display' panels are supported — just make sure the high refresh rate mode is enabled in your device settings.
Refresh rate FAQ
How to test refresh rate
Scroll to the refresh rate test tool at the top of this page and press Start. Keep the browser tab focused for 3–5 seconds while it times your display's frames using the requestAnimationFrame API, then read your live Hz. It instantly tells you whether your screen is running at 60Hz, 120Hz, 144Hz, 240Hz or higher — with no download or sign-up required.
How to test monitor refresh rate
To test a specific monitor, drag your browser window onto that screen and run the test above. The browser repaints at the refresh rate of whichever display it sits on, so you can check each monitor in a multi-display setup one at a time, then compare the measured Hz to the monitor's rated specification.
How can I test refresh rate?
You can test your refresh rate right here in your browser — no app or plugin needed. Press Start on the tool above, wait a few seconds for the reading to stabilise, and read your real-time Hz. It works on PC, Mac, Android, iPhone and tablets.
How is refresh rate calculated?
Refresh rate is the number of times per second your display redraws the image, measured in Hertz (Hz). Our tool calculates it by counting how many frames the browser paints during a timed window with a high-precision clock: frames divided by seconds equals Hz. For example, 120 frames drawn in one second equals 120Hz.
How do I know if my monitor is 60Hz or 144Hz?
Run the test above — a 60Hz monitor reads around 59.9–60.1 Hz, while a 144Hz monitor reads around 143.9–144.1 Hz. If a 144Hz display only shows 60Hz, the high rate is usually not enabled in your OS display settings, or a slow HDMI cable or port is limiting the bandwidth.
What is a normal refresh rate?
60Hz is the standard, normal refresh rate for most everyday monitors, laptops and phones. Gaming and premium displays commonly run at 120Hz, 144Hz, 165Hz, 240Hz or more. Anything at or above 60Hz is normal for general use, while 120Hz and higher is the norm for smooth gaming.
Why is refresh rate important?
A higher refresh rate makes everything on screen smoother — scrolling, cursor movement, animations and especially fast-paced games. It reduces motion blur and perceived input lag and keeps moving objects clearer, which gives competitive gamers a real advantage and can ease eye strain during long sessions.
What is the difference between refresh rates?
The difference is how many frames per second a screen can show: 60Hz displays 60, 120Hz displays 120, 144Hz displays 144, and so on. Higher rates look noticeably smoother and feel more responsive. The jump from 60Hz to 120Hz or 144Hz is the most dramatic, while gains above 240Hz are subtler and mainly benefit competitive gamers.
Can the human eye see above 60Hz?
Yes. The eye does not count frames, but most people clearly notice the extra smoothness moving from 60Hz to 120Hz or 144Hz, and many can perceive differences up to 240Hz and beyond — especially in motion, fast scrolling and gaming. 60Hz is not the limit of human perception.
What is the difference between FPS and Hertz?
FPS (frames per second) is how many frames your GPU or software produces, while Hertz (Hz) is how many frames your display can actually show each second. They work together: a 144Hz monitor can display at most 144 FPS even if the game renders more, and a 144Hz screen fed only 60 FPS will still look like 60.
How many hertz can a human see?
There is no exact cut-off, but research and real-world testing suggest most people perceive clear improvements up to roughly 120–240Hz, with smaller but still noticeable benefits beyond that. Sensitivity varies from person to person and is strongest with motion, which is why 120Hz and 144Hz feel so much smoother than 60Hz.
What is the perfect refresh rate?
There is no single perfect rate — it depends on how you use your screen. 60Hz is fine for basic browsing and office work, 120Hz is a great all-round sweet spot, and 144Hz to 240Hz is ideal for gaming. The best refresh rate is simply the highest your display and GPU can reliably sustain for your tasks.
The Complete Guide to Refresh Rate Testing
Whether you've just bought a new gaming monitor, upgraded to a high-refresh-rate phone, or simply want to verify your setup is performing as advertised, our refresh rate test gives you an instant, accurate answer — completely free, with no downloads and no sign-ups required. This page explains exactly what refresh rate is, why it matters, how our tool works across every device, and how to make sure you're getting every Hertz you paid for.
What Is Refresh Rate and Why Does It Matter?
Refresh rate measures how many times per second your display draws a new image, expressed in Hertz (Hz). A standard display refreshes at 60Hz — sixty frames per second. High-refresh-rate panels run at 90Hz, 120Hz, 144Hz, 165Hz, 240Hz, or even 360Hz. The difference is immediately visible: scrolling feels smoother, cursor movements look more precise, and fast-paced games become significantly easier to track.
For competitive gamers, a higher refresh rate can mean the difference between winning and losing a gunfight. For everyday users, a smooth 120Hz screen reduces eye strain during long reading or browsing sessions. Running a quick screen refresh rate test is the fastest way to confirm that your hardware is actually delivering what it promises.
How to Use This Free Refresh Rate Test
Using our display refresh rate test is effortless:
- Scroll up to the test widget above and press Start.
- Keep the browser tab focused and visible — don't minimise it.
- Wait 3–5 seconds for the reading to stabilise. You'll see live current Hz, an average, a max, a min, a stability score, and a frame-time graph.
- Compare the result to your display's rated Hz specification.
- If the numbers don't match, visit our Troubleshooting guide for step-by-step fixes.
Our refresh rate test free tool never asks for personal information, never shows advertisements, and never sends data to a server. Every measurement happens inside your own browser using the requestAnimationFrame API and a high-precision performance clock.
Monitor Refresh Rate Test — PC and Mac
A monitor refresh rate test on a desktop or laptop is the most common use case. Windows and macOS both let you set your display rate in system settings, but the setting doesn't always stick after a driver update, a new cable, or a change in resolution. Our tool gives you real-time confirmation that the OS setting is actually being applied all the way to the pixels on screen.
On Windows 10 / 11, navigate to Settings → System → Display → Advanced display to choose your refresh rate. After changing it, return here and run the test again to confirm. On macOS, open System Settings → Displays, hold Option, and click the Refresh Rate dropdown to reveal the full list of supported rates.
Multi-monitor setups deserve special attention: the browser renders at the rate of the display the window is currently sitting on. Drag the browser window onto the monitor you want to measure, then run the test.
120Hz Refresh Rate Test — Is Your Display Really Running at 120Hz?
The jump from 60Hz to 120Hz is one of the most impactful display upgrades available today. Our 120Hz refresh rate test will show a steady reading of approximately119.9–120.1 Hz when everything is set up correctly. If you're seeing 60Hz on a 120Hz-capable display, the most common culprits are:
- An HDMI 1.4 cable, which cannot carry 1080p at 120Hz — upgrade to HDMI 2.0/2.1 or DisplayPort.
- A laptop running on battery in power-saving mode, which forces 60Hz to extend battery life.
- The OS refresh rate setting still set to 60Hz after enabling a high-refresh panel.
- An outdated GPU or display driver that doesn't expose the higher rate.
Refresh Rate Test on Mobile — Android and iPhone
Our refresh rate test mobile experience works just as well on smartphones and tablets as it does on a desktop. Modern flagship phones ship with 90Hz, 120Hz, or even 144Hz panels, but many default to 60Hz to conserve battery.
To run a free mobile refresh rate test, simply open this page in your phone's browser and tap Start. No app download is needed. For accurate results:
- Android: Go to Settings → Display → Motion Smoothness (or "Smooth display") and select High or Adaptive. Disable Battery Saver mode, which often forces 60Hz.
- iPhone (ProMotion): ProMotion on iPhone 13 Pro and later adjusts dynamically up to 120Hz. To prevent iOS from capping it, go to Settings → Accessibility → Motion and ensure "Limit Frame Rate" is turned off.
- iPad / tablets: The same browser-based method applies. Newer iPads with ProMotion display up to 120Hz natively in Safari.
Understanding Your Test Results
Our display refresh rate test shows more than just a single number. Here's what each metric means:
- Current Hz — the instantaneous frame rate at this exact moment.
- Average Hz — a rolling average over the last second; the most reliable figure.
- Max / Min Hz — the highest and lowest spikes recorded during the test run.
- Stability score — how consistent the frame timing is. 95%+ is excellent.
- Dropped frames — frames that took roughly twice as long as expected, indicating a cable, adapter, or GPU issue.
A reading within 1% of your panel's rated Hz is normal and healthy. Small decimal differences (e.g. 143.9 instead of 144) simply reflect how displays and browser timers work in the real world — they are not a defect.
Why Choose This Free Refresh Rate Test?
There are many tools online that claim to check your Hz, but most show only a single rounded number with no context. Our tool was built from the ground up to be honest and transparent:
- Works on every device — desktop, laptop, phone, tablet — without a plugin or app.
- Provides live frame-time graphs so you can spot instability at a glance.
- Detects dropped frames that other tools ignore entirely.
- Completely private — no data leaves your device, ever.
- Genuinely free with no account required and no ads obscuring the results.
Run the refresh rate test now, bookmark this page, and come back any time you change your display setup, update your drivers, or buy a new monitor. A five-second check can save hours of troubleshooting and confirm you're getting the smooth, high-Hz experience your display was designed to deliver.