Your device
Refresh rate test
Tap Start, then keep this page open for a few seconds.Press Start, then keep this page open for a few seconds.
Nothing to do while it measures.
About this refresh rate test
This refresh rate test shows how many times a second your screen draws a new picture, which is what the word hertz (Hz) counts. Press Start and leave the page open for a few seconds. The page counts the frames your browser draws, finds the middle gap between them, and turns it into a number such as 60 or 144. It also tells you whether some frames came late, which is what a stutter looks like in numbers. It is free, needs no account, and nothing you measure leaves your device.
How the test works
- Press Start. The page begins counting frames at once.
- Leave the page in front and do nothing. It needs 30 frame gaps at the least and takes about 120.
- Read your refresh rate and the sentence under it. Open How we measured this for the figures behind it.
- Press Try again to measure a second time, for example after you change a display setting.
What does the number mean?
Most screens are sold with a refresh rate of 60 Hz. Phones, tablets and gaming monitors are often 90 Hz, 120 Hz, 144 Hz or 240 Hz. A higher rate draws more pictures every second, so moving things look smoother and the screen answers sooner after you move the mouse or swipe. Our page shows the standard rate your reading is nearest to, and the exact measured rate under How we measured this.
There is no good or bad number here. For orientation, the result says which rates the browsers' own documentation calls common: 60 (as the reference states it)[1] Hz most of all, with rates up to 144 (as the reference states it)[1] Hz also widely used[1]. That is a reference fact, not a ranking. The reading tells you what your browser did on this screen at this moment. If the number is lower than the one on the box, read the section on why that happens before you blame the screen.
How we measure
We use the median, the middle value, of about 120 gaps between frames, not the average. A few late frames pull an average down but leave the middle where it was. The rate is then compared with the rates screens are sold with, and the closest one is shown if your reading is within a few percent of it.
Fewer than 30 gaps is too little to call a rate, so a check that was stopped early is not saved. The result you get is kept in this browser only, like the results of the other tests on this site. You can read about us to see who makes it.
Why the number can be lower than your screen's rating
A browser can only count the frames it draws, not read what the screen is built for. Several things hold the count down: a power saver or battery mode, a laptop running on its battery, a window on a second screen with a slower rate, a browser that limits itself to 60 frames, or a computer so busy that it cannot keep up. Check the display settings of your system first: a fast monitor often still runs at 60 Hz until you choose the higher rate.
What to try if the number looks wrong
- Close other tabs and programs, then measure again.
- Plug a laptop into power and switch off any battery saver.
- Open the display settings of your computer and choose the highest refresh rate it offers.
- Measure in a different browser: some limit the rate of a page that is not in focus.
- Use a good cable. Some cables cannot carry a high rate at full resolution.
Questions
What is a refresh rate?
It is how many times a second your screen can show a new picture, counted in hertz. A higher rate looks smoother when things move.
Is the refresh rate test free?
Yes. There is no account and no sign-up, and the reading stays in this browser.
Why does my fast monitor show a lower rate?
The system may still be set to a lower rate, a power saver may be limiting the browser, or the window may be on another screen. Check your display settings and measure again.
What are dropped frames?
They are frames that came later than the screen's rhythm says they should. A few are normal. Many make motion look jerky.
Sources
- MDN Web Docs (Mozilla) (2026). Window: requestAnimationFrame() method. MDN Web Docs.https://developer.mozilla.org/en-US/docs/Web/API/Window/requestAnimationFrame
Screens that web pages are drawn on, as the reference describes them