The rate this page reads against. One frame lasts 16.67 ms, which is 1,000 divided by 60, and ten seconds at this rate hold 600 frames. An average from 58.2 to 61.8 counts as 60.
Right nowframes a second
This is the browser's rate. The monitor's own rate can be higher.
60 Hz, 16.67 ms a frameThe rate this page reads against. One frame lasts 16.67 ms, which is 1,000 divided by 60, and ten seconds at this rate hold 600 frames. An average from 58.2 to 61.8 counts as 60.
75 Hz, a quarter more than 6013.33 ms a frame and 750 frames in ten seconds, 150 more than at 60. Pick it when the screen is set to 75 and you want the count read against that.
90 Hz, half as much again as 6011.11 ms a frame and 900 frames in ten seconds. Three frames at 90 take 33.3 ms, the time of two frames at 60.
120 Hz, twice 608.33 ms a frame, half the length of a frame at 60. On a count of 120 the three lanes draw 120, 60 and 30 frames a second, so the middle lane shows what 60 looks like beside it.
144 Hz, 2.4 times 606.94 ms a frame and 1,440 frames in ten seconds, against 600 at 60. A count that lands here on this page means the browser is drawing well over twice the frames this test is named for.
165 Hz, 2.75 times 606.06 ms a frame and 1,650 frames in ten seconds, 1,050 more than at 60. Eleven frames at 165 take the time of four at 60.
240 Hz, four times 604.17 ms a frame: four frames in the time one takes at 60. On a count of 240 the three lanes draw 240, 120 and 60 frames a second, with 60 on the bottom lane.
Show all 23 rates and readings (16 more)
What a count means against 60 8
60 against a faster pickYou picked a faster rate and the browser still drew 60. That figure can be set in three places: the refresh rate chosen in the display settings, a power-saving mode, or the browser's own limit on pages. This count cannot say which.
A 60 Hz screen, or a browser held to 60?Count again in a second browser on the same screen. If one reads 60 and the other reads more, the lower figure belongs to that browser. If every browser reads 60, look at the refresh rate chosen in the display settings.
A count near 30Half of 60: the browser drew a frame on every second refresh, 33.3 ms apart. A power-saving mode or a busy device can halve the rate. Plug in, close other tabs and count again.
A figure that is not in the rowA count of 59.9 or 60.1 is 60: a rate is named when the average falls within 3 percent of it. A figure such as 50 or 100 is a real rate on some screens that this page does not list.
A steady 60Your browser drew 60 frames a second, one every 16.67 ms. A 60 Hz screen gives that count, and so does a browser that stops at 60 on a faster screen. The number alone cannot tell those two apart.
An uneven 60The average can be 60 while single frames swing. Steady means nine frames in ten within a quarter of the usual length, 12.5 to 20.8 ms at 60. Fewer than that and something else is competing for the device.
Frames that came late at 60A frame counts as missed when the gap before it is more than one and a half times the usual one: at 60, over 25 ms where 16.67 was due. A few in a count are ordinary background work. A steady stream means the browser is not keeping up.
More than 60The count matched a faster rate in the row above, so your browser is drawing more than 60 frames a second. Pick that rate to read the count against it. The refresh rate test checks any rate from 60 to 360.
What to watch while it counts 3
Frame-time graph, a line at 16.67 msOne column a frame, as tall as the frame was long. With 60 picked, the grey line marks 16.67 ms. A column twice that height, 33.3 ms, is one frame that never came. Nothing on the graph moves.
Moving strip, 96 steps a crossing at 60A narrow bar crosses the picture in 1.6 seconds, one step a frame: 96 steps at 60. A hitch in its travel is a frame that came late.
Three lanes: 60, 30 and 15 frames a secondThree blocks cross together. The top one is redrawn every frame, the middle one every second frame and the bottom one every fourth. On a count of 60 that puts 60, 30 and 15 frames a second in one picture.
60 Hz and 60 fps 5
A hidden tab ends the countMost browsers pause page animation in a background tab, so a count runs only while this tab is in front. A count that was interrupted is thrown away, and the page says so. Press Start again when you are back.
Film at 24 frames a second on a 60 Hz screen24 does not divide into 60: each film frame would need two and a half refreshes. A 60 Hz display usually holds frames for three refreshes and two in turn, which gives slightly uneven movement. 30 divides evenly, two refreshes a frame.
Hz and fps are two countsHz is how often a screen shows a new picture. Frames a second, fps, is how many pictures the source draws. A browser generally draws one frame for each refresh, so here the two agree, and the figure this page reports is the browser's.
Ten seconds at 60 is 600 framesThe count leaves out its first half second, while the page settles after the press, and averages the rest: about 570 frames at 60. One late frame among that many moves the average very little.
Why most counts read 6060 Hz is the most common refresh rate; 75, 120 and 144 Hz are also widely used. It is the standard rate that faster screens are set against.
How this list was compiled: Written for this page. Every frame length and frame count was worked out, never copied from another page: a frame lasts 1,000 ms divided by the rate, and a ten-second count holds ten times the rate in frames. That a browser generally draws its animation frames at the display's refresh rate, that 60 Hz is the most common rate with 75, 120 and 144 Hz also widely used, and that most browsers pause page animation in background tabs, are from https://developer.mozilla.org/en-US/docs/Web/API/Window/requestAnimationFrame. That 60 Hz is the standard rate faster displays are set against, that film is typically shot at 24 frames a second, and that a display fixed at 60 cannot show it evenly and usually holds frames for three and two refreshes in turn, are from https://en.wikipedia.org/wiki/Refresh_rate. That one browser engine prefers page updates near 60 frames a second by default on phones, tablets and computers, and is reported to hold page animation to 30 in a low-power mode, is from the discussion of WebKit bug 173434, https://bugs.webkit.org/show_bug.cgi?id=173434 (open, last changed 2026-05-19). All read 2026-10-06. Wikipedia text is under CC BY-SA 4.0 and is restated here in this site's own words. How a count is read (the first half second left out, a rate named within 3 percent, a frame counted as missed when it comes more than one and a half times late, steady meaning within a quarter of the usual frame) is this page's own method. The page measures how often the browser draws, which can be lower than the rate of the screen. Licence: own work
How it works
This 60hz test counts the frames your browser draws for ten seconds and reads the average against 60. A count of 60 fits a 60 Hz screen, or a browser held to 60.
Read the full guide
Run the 60 fps check
1. Leave 60 Hz picked and press Start.
2. Keep this tab in front for ten seconds.
3. Read the average against 60.
4. A count near 30 is half rate. A faster count is named as 75, 90, 120, 144, 165 or 240 Hz.
What a count of 60 cannot tell you
A 60 Hz screen and a faster screen whose browser stops at 60 give the same number. Count in a second browser to tell them apart. The figure is the browser's rate, never the panel's.
Questions and answers
Is a 60fps test the same as a 60Hz test?
Here, yes. Hz is how often a screen shows a new picture; fps is how many pictures the source draws. A browser generally draws one frame for each refresh, so one count answers both.
What should a 60 fps tester read on a 60 Hz screen?
An average between 58.2 and 61.8 frames a second, with a usual frame of about 16.7 ms and few late frames. Ten seconds at 60 is 600 frames; the count leaves out its first half second.
Why does it read 60 when my screen is faster?
A count of 60 can be set in three places: the refresh rate chosen in the display settings, a power-saving mode, or the browser's own limit, which Safari keeps near 60 by default. The count cannot say which.
How long is one frame at 60 Hz?
16.67 ms, which is 1,000 ms divided by 60. At 30 frames a second a frame lasts 33.3 ms, and at 120 it lasts 8.33 ms.