Free Refresh Rate Test
A free refresh rate test: live Hz, FPS and frame times.
Measuring your refresh rate…
Frame stats
Frame time graph
Last 120 frames, lower and flatter is better
Motion test
Blocks at 1x, 2x and 4x speed
Your Screen Info
Detected in your browser
Colour screens
Tap a colour to test it fullscreen
Custom colour
What is a refresh rate test?
The refresh rate test measures how many times per second your browser can draw a new frame. That matches your display's refresh rate, so a 144 Hz monitor shows about 144 Hz. The result updates live.
Use this test to check that a new 120, 144 or 240 Hz monitor is really running at its full rate, to spot dropped frames, and to compare motion at different speeds.
How to run the test
1
Keep the tab in front
Do not switch tabs while measuring; browsers slow hidden tabs down.
2
Read the Hz value
The ring shows your refresh rate. Frame stats show current, average, min and max FPS.
3
Check smoothness
Watch the frame time graph and the motion test. Press Measure again after changing settings.
How to read your results
Hz value
Your current refresh rate, rounded to the nearest common value such as 60, 144 or 240 Hz.
Frame time
Time between frames in milliseconds. 16.7 ms is 60 Hz, 6.9 ms is 144 Hz.
Orange bars
Frames that took much longer than normal. A few are normal; many mean stutter.
Lower than expected
Check refresh rate in display settings, your cable and battery saver mode.
Related tests
Ghosting Test
Moving blocks show motion blur and trails
Screen Resolution Test
See your resolution, pixel ratio and more
Monitor Screen Test
Check a new or used monitor
Laptop Screen Test
Check a laptop display
TV Screen Test
Check a TV in its browser
Color Banding Test
Smooth gradients that show stripes
Frequently asked questions
Why does it show 60 Hz on my 144 Hz monitor?
Your display is probably set to 60 Hz. Change it in Windows display settings or macOS Displays, and use a DisplayPort or suitable HDMI cable.
Is the result accurate?
It measures how often your browser draws frames, which matches the display refresh rate in most cases. Battery saver modes and busy computers can lower it.
What is a good refresh rate?
60 Hz is standard. 120 to 165 Hz feels much smoother, and 240 Hz and up suits competitive gaming.
Does it work on phones?
Yes. Many phones run at 90 or 120 Hz, and some lower it to save battery.