Refresh Rate Checker
A free, browser-based refresh rate (Hz) checker.
Current Refresh Rate
Smoothness Test Animation
Detected Rate: -- Hz
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About Refresh Rate Checker
This is a free web tool that allows you to measure how many times your monitor or smartphone screen redraws per second (Refresh Rate: Hz) in real-time, right from your browser.
A higher Refresh Rate (Hz) means smoother visuals. Especially in PC gaming and eSports, using high refresh rate gaming monitors like 144Hz or 240Hz is considered crucial for improving visibility and aiming accuracy.
Designed to be ultra-lightweight, you can instantly check your current Hz just by opening the page. There is no need to install heavy benchmark software. All measurement processes run locally in your browser, so no data is sent to servers, keeping your privacy secure.
How to Use the Refresh Rate Checker
Open the Page
Simply open this page, and your browser will automatically start the screen rendering test.
Wait a Few Seconds
To calculate a more accurate number, wait a few seconds until the number in the center stabilizes. Keep the tab active.
Check Your Hz
The large number displayed is your current refresh rate (e.g., 60Hz, 144Hz). Check if it matches your OS and monitor settings.
Refresh Rate Glossary
- Refresh Rate
- The number of times per second a display redraws the screen. Measured in Hz (Hertz). A 60Hz display refreshes 60 times per second, while a 144Hz display refreshes 144 times. Higher numbers mean smoother motion and less blur.
- Frames Per Second (FPS)
- The number of images your PC or console generates per second. While refresh rate is the "monitor's" capability, FPS is the "PC's (graphics card's)" capability. Both need to be high for a truly smooth experience.
- Gaming Monitor
- Monitors that support high refresh rates like 120Hz, 144Hz, or 240Hz, compared to standard 60Hz office monitors. They include features dedicated to improving response times and visibility in games.
- Screen Tearing
- A visual artifact where the screen appears horizontally split or shifted, caused when the PC's FPS and the monitor's Hz are out of sync. Technologies like G-SYNC and FreeSync help prevent this.
- requestAnimationFrame
- A JavaScript mechanism in web browsers designed to update animations at the optimal time. This tool measures your Hz by utilizing its property of running in sync with the monitor's refresh rate.
Frequently Asked Questions
- Q.I have a 144Hz monitor but it shows 60Hz. Why?
- Even if your monitor supports 144Hz, your OS (Windows or Mac) display settings are often set to 60Hz by default. Go to your OS Display Settings -> Advanced Display Settings and change the refresh rate to 144Hz. Also, ensure you are using a DisplayPort cable, as some HDMI cable versions do not support high Hz output.
- Q.Is it normal to see numbers like 143Hz or 59Hz?
- Yes, it is perfectly normal. Standard 60Hz or 144Hz monitors actually operate at hardware specifications like "59.94Hz" or "143.98Hz", causing slight decimal variations during browser measurement. For simplicity, this tool rounds them to the nearest standard integer (e.g., 60Hz, 144Hz) for the main display.
- Q.Can I measure the Hz on smartphones or tablets?
- Yes, you can. If you access this tool on an iPhone with a ProMotion display (120Hz) or an Android gaming phone (90Hz, 120Hz, 144Hz), it will correctly detect the screen's refresh rate. Note that if power-saving mode is on, the rate may be restricted to 60Hz.
- Q.Are my measurement results sent to a server?
- No, they are not. All refresh rate measurements are executed entirely within your browser using JavaScript. No device data is sent externally, ensuring your privacy is completely protected.
- Q.Which screen's Hz is measured in a multi-monitor setup?
- The tool measures the refresh rate of the monitor where the browser window is currently displayed. For example, if you drag the window from a 60Hz secondary monitor to a 144Hz primary monitor, the result will automatically update to 144Hz.
Use Cases
Testing New Monitors
When you buy a 144Hz or 240Hz gaming monitor, instantly verify if your OS settings are correct and the high refresh rate is actually outputting just by opening the browser.
Smartphone Display Check
Quickly check if your iPhone Pro or Android's 120Hz display is delivering its full performance without being limited by power-saving modes.
Cable Troubleshooting
Diagnose whether your HDMI/DisplayPort cable type or adapter is bottlenecking your monitor's refresh rate to 60Hz.
Multi-Monitor Behavior
Test if your browser correctly recognizes different refresh rates when dragging windows between monitors with mismatched Hz settings.
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