Measuring from live frames…
Your screen's true refresh rate
Instantly check your monitor's real refresh rate (Hz) — measured in real time from your browser's frame timing. No downloads, no accounts, no data ever leaves your device.
Tip: Close other demanding apps and keep this tab focused. The longer it runs, the more accurate the reading becomes.
Everything about your display
A complete breakdown of what your browser can detect about the screen you're using right now.
Professional display tests
Fullscreen diagnostics used to inspect panel quality. Click any card to launch. Press Esc or click to exit.
How the refresh rate test works
Everything you need to know about measuring and understanding your screen's refresh rate.
A refresh rate test tells you how many times per second your monitor or screen redraws its image, measured in hertz (Hz). A display running at 60 Hz refreshes 60 times every second, while a 144 Hz gaming monitor refreshes 144 times per second. The higher the number, the smoother motion appears — which matters for gaming, scrolling, video, and everyday desktop work. This free online tool measures your real refresh rate directly in your browser, so you can confirm whether your screen is actually running at the Hz you paid for.
Why check your refresh rate?
Many people buy a 120 Hz, 144 Hz, or 240 Hz monitor and never confirm it is running at full speed. Operating systems frequently default new displays to 60 Hz, and the wrong cable (an older HDMI or DisplayPort version), an outdated graphics driver, or an incorrect display setting can silently cap your refresh rate. Running a quick refresh rate test is the fastest way to verify your monitor's true performance and catch a misconfiguration before it costs you smoothness in games or motion clarity in video.
How our refresh rate checker measures Hz
Instead of guessing from your system settings, this tool samples real rendered frames using the browser's requestAnimationFrame timing API. It records the time between each frame — the frame time in milliseconds — and converts the median interval into a refresh rate. A frame time of 16.7 ms equals 60 Hz, 8.3 ms equals 120 Hz, and 6.9 ms equals 144 Hz. Because it measures actual output, the reading reflects what your display and browser are genuinely rendering, not just the value listed in your settings panel.
Getting the most accurate reading
For the best result, keep this tab focused and in the foreground, close other demanding applications, and let the test run for a few seconds. Browsers throttle background tabs, so an inactive window will report a lower rate. If you want a more precise number, enable Precision mode, which measures for 30 seconds and averages out momentary stutters caused by other apps or background system activity. The longer the test runs, the more stable and trustworthy the reading becomes.
Common refresh rates explained
60 Hz is the standard on most laptops, office monitors, and phones — perfectly fine for browsing and video. 75 Hz and 90 Hz offer a modest smoothness bump. 120 Hz is common on modern phones, tablets, and TVs, delivering noticeably fluid scrolling. 144 Hz is the sweet spot for PC gaming, while 240 Hz and 360 Hz are built for competitive esports where every millisecond counts. If your test shows a number well below your monitor's rating, it is worth checking your display settings and cables.
Beyond refresh rate: a full display test
Refresh rate is only one measure of screen quality. This site also works as a complete monitor test and display checker: read your exact resolution, pixel density, color depth, and color gamut in the Display Info panel, then run fullscreen diagnostics to hunt for dead or stuck pixels, inspect color banding, check backlight uniformity and bleed, judge motion blur and ghosting, and evaluate contrast, gamma and text sharpness. Together these tests give you a professional-grade picture of your panel's real-world quality — all for free, and all without installing anything.
Private by design
Everything runs entirely inside your browser. No frame data, display information, or measurements are ever uploaded to a server — there is no account, no tracking of your results, and nothing is stored about your device. You can even run the tool offline. Whether you are verifying a new gaming monitor, troubleshooting a laptop screen, or checking a phone display, this refresh rate test gives you an accurate answer in seconds.
Refresh rate test for monitors, phones, iPhone & TVs
One online refresh rate checker for every display you own — desktop monitors, laptops, Android phones, iPhone, iPad and smart TVs.
This refresh rate test runs entirely in your browser, so the same screen refresh rate test works on virtually any device without installing an app. Whether you are on a gaming monitor, an ultrabook, an Android phone, an iPhone or a smart TV, open this page on the device you want to check and the tool measures the real Hz it is actually rendering. Because it is a refresh rate test online, there is nothing to download, no account to create, and no data ever leaves your device — just an instant, accurate reading.
Testing a monitor or laptop
On a desktop monitor or laptop, this doubles as a fast refresh rate checker to confirm your panel runs at its rated 60 Hz, 75 Hz, 120 Hz, 144 Hz, 240 Hz or 360 Hz. Windows and macOS often default a brand-new display to 60 Hz, so a quick measurement is the surest way to catch a mismatched cable, an outdated driver or a wrong display setting before it silently costs you the smoothness you paid for.
Refresh rate test on mobile & Android
Running a refresh rate test on mobile is just as simple — open this page in your phone's browser and let it measure. Many modern Android phones ship 90 Hz, 120 Hz or even 144 Hz panels, but they routinely drop back to 60 Hz to save battery or when a particular app requests a lower rate. Testing directly on the handset reveals the refresh rate your screen is using right now, rather than the number printed on the spec sheet.
iPhone refresh rate & iPhone 16
For a refresh rate test on iPhone, the detail that matters is ProMotion. Standard iPhone models are locked to 60 Hz, while iPhone Pro models with ProMotion scale adaptively from 10 Hz all the way up to 120 Hz. If you are checking the iPhone 16 refresh rate specifically, the base iPhone 16 and 16 Plus stay at 60 Hz, whereas the iPhone 16 Pro and Pro Max use ProMotion up to 120 Hz. This tool reflects the iPhone refresh rate Safari is currently rendering, making it a practical way to see whether ProMotion is active.
TV refresh rate
Checking TV refresh rate is trickier, because manufacturers love to advertise inflated "motion rate" or "effective refresh rate" figures — a set marketed as 120 or 240 may actually use a native 60 Hz panel with motion interpolation. To measure the genuine value, open this page in your smart TV's built-in browser or on a device connected to the TV, and read the real Hz instead of the marketing number. A true 120 Hz TV paired with an HDMI 2.1 connection is what you want for smooth 4K gaming.
Variable refresh rate (VRR)
Finally, variable refresh rate — sold as G-Sync, FreeSync, ProMotion or simply VRR on HDMI 2.1 TVs — lets a display change its refresh rate on the fly to match the frames your GPU produces, eliminating tearing and stutter. On a VRR screen the measured Hz can fluctuate instead of resting on one fixed value, and this tool flags that variability when it detects it, so you know your adaptive-sync display is doing its job.
However you use it, this free refresh rate test gives you an accurate, device-specific answer in seconds. Bookmark it as your go-to refresh rate checker and re-run the screen refresh rate test any time you connect a new monitor, update a driver, swap a cable, or pick up a new phone, iPhone or TV.
Who uses a refresh rate test?
From gamers verifying a new 144 Hz panel to shoppers checking a used monitor, here's who reaches for a quick Hz check.
🎮 Gamers
Confirm a new 144 Hz, 240 Hz or 360 Hz monitor is actually running at full speed, and catch Windows silently defaulting it to 60 Hz before a competitive match.
🛒 Monitor shoppers
Verify that a new or second-hand display genuinely hits its advertised refresh rate before the return window closes.
💻 Laptop owners
Check whether battery saver, the wrong power mode, or an outdated driver is throttling your screen below its rated Hz.
📱 Phone & tablet users
See if your device is really using its 90 Hz or 120 Hz mode, or quietly dropping to 60 Hz to save power.
🎨 Designers & editors
Confirm smooth, tear-free motion for scrolling, video playback, and animation work where frame pacing matters.
🔧 IT & support
Diagnose a "screen feels laggy" complaint in seconds, on any device, without installing or downloading anything.
Monitor stuck at 60 Hz? How to enable your full refresh rate
If this test shows a lower number than your monitor's rating, your system is probably capping it. Here's how to unlock the full Hz on Windows and macOS.
⊞ Windows 11 & 10
- Right-click the desktop and choose Display settings.
- Scroll down and click Advanced display.
- Under Choose a refresh rate, pick the highest value available (e.g. 144 Hz).
- If only 60 Hz appears, update your graphics driver and check your cable (see below), then try again.
- Re-run the refresh rate test above to confirm the change.
macOS
- Open System Settings → Displays.
- Hold Option and click Refresh Rate to reveal all available rates.
- Select the highest supported refresh rate for your display.
- On ProMotion Macs, set Refresh Rate to ProMotion for adaptive up to 120 Hz.
- Re-run the test above to verify.
⌁ Still capped? Check these
- Cable & port: Use DisplayPort or HDMI 2.0+. Older HDMI or a cheap cable can limit high rates, especially at higher resolutions.
- Graphics driver: Update to the latest NVIDIA, AMD or Intel driver — outdated drivers often hide higher refresh rates.
- GPU control panel: Set the rate in the NVIDIA Control Panel or AMD Radeon Software too, not just the OS.
- Resolution: Some monitors only reach their top Hz at a specific resolution. Try native resolution.
- Background tab throttling: Browsers slow inactive tabs — keep this tab focused while testing.
Refresh rate test FAQ
Answers to the most common questions about testing your screen's refresh rate.
How do I test my monitor's refresh rate?
Just open this page — the test starts automatically and measures your screen's real refresh rate in a few seconds. Keep the tab focused, close other heavy apps, and press Re-measure for a fresh reading. Enable Precision mode for a longer, more accurate 30-second test.
What is a good refresh rate?
60 Hz is fine for everyday use and video. 120 Hz and 144 Hz feel noticeably smoother and are ideal for gaming. 240 Hz and above are aimed at competitive esports. A higher refresh rate means smoother motion and lower input lag.
Why is my refresh rate lower than expected?
The most common causes are your operating system defaulting the display to 60 Hz, an outdated graphics driver, or a cable that doesn't support higher rates (for example an older HDMI or DisplayPort version). Check your display settings and select the highest available refresh rate, then re-run the test.
Is this refresh rate test accurate?
Yes. It measures real rendered frames using the browser's frame-timing API rather than reading your system settings. For the most reliable number, keep the tab in the foreground and use Precision mode, which averages 30 seconds of frames to smooth out momentary stutters.
Can I test the refresh rate on my phone or tablet?
Absolutely. The test works on any modern browser, including phones and tablets. Many recent phones run at 90 Hz or 120 Hz — open this page on your device to confirm the rate your screen is actually using.
What does Hz mean for a screen?
Hz (hertz) is the number of times per second your display redraws its image. 60 Hz means 60 redraws per second. More redraws produce smoother motion and clearer fast-moving content.
Does the test store or upload my data?
No. Everything runs locally in your browser. No measurements, display details, or personal data are uploaded or stored — your results never leave your device.
What else can I test besides refresh rate?
You can read your resolution, pixel ratio, color depth and color gamut, and run fullscreen tests for dead/stuck pixels, color banding, backlight uniformity, motion and ghosting, and contrast, gamma and text sharpness — a complete monitor quality check.
What is the difference between 60Hz and 144Hz?
A 144 Hz display refreshes 144 times per second versus 60 for a 60 Hz screen — more than double the frames. The result is visibly smoother motion, clearer fast-moving detail, and lower input lag. The difference is most obvious in gaming and fast scrolling, and many people notice it the moment they switch back to 60 Hz.
Is a higher refresh rate better for your eyes?
For many people, yes. Smoother, more consistent motion at 120 Hz or higher can feel easier on the eyes and reduce the sense of flicker or strain during long sessions of scrolling, reading, and gaming. It is not a medical fix, but a steady high refresh rate generally makes on-screen motion more comfortable.
Do I need a special cable for 144Hz?
Often, yes. To reach 144 Hz — especially at 1440p or 4K — use DisplayPort or HDMI 2.0 or newer with a cable rated for that bandwidth. An older HDMI 1.4 cable or a cheap unrated cable can silently cap you at 60 Hz. If this test shows a lower rate than expected, your cable or port is a common culprit.
Can this tool detect 240Hz or 360Hz?
Yes. The test measures whatever rate your browser is rendering at, including 240 Hz and 360 Hz panels. For very high rates, keep the tab focused, close other apps, and enable Precision mode for the steadiest reading, since browser and system overhead can add slight variance at the top end.
What is refresh rate?
Refresh rate is the number of times per second a display redraws its image, measured in hertz (Hz). A 60 Hz screen refreshes 60 times per second; a 144 Hz screen refreshes 144 times. A higher refresh rate produces smoother motion, clearer fast-moving detail and lower input lag.
What is variable refresh rate?
Variable refresh rate (VRR) — marketed as G-Sync, FreeSync, ProMotion, or VRR over HDMI 2.1 — lets a display change its refresh rate in real time to match the frame rate your GPU is producing. This removes screen tearing and stutter for smoother gaming. On a VRR screen the measured Hz can vary instead of staying fixed, which this tool detects and flags.
How to check monitor refresh rate?
The quickest way is to run this online refresh rate test — open the page, keep the tab focused, and it measures your real Hz in a few seconds. You can also check it in Windows under Settings → System → Display → Advanced display, or on macOS under System Settings → Displays.
How to change monitor refresh rate?
On Windows, right-click the desktop → Display settings → Advanced display, then pick the highest value under "Choose a refresh rate." On macOS, open System Settings → Displays and hold Option while clicking Refresh Rate to reveal every option. Re-run the test above to confirm the change took effect.
Built for privacy & accuracy
- ✓ Fully offline-capable. Everything runs in your browser — no server, no API calls, no tracking.
- ✓ Nothing is stored. Your display data never leaves this device.
- ✓ Real measurements. Refresh rate is sampled from actual rendered frames, not guessed.
- ✓ Works anywhere. Desktop, laptop, tablet or phone — any modern browser.