100Hz Test – Check Your Monitor Runs at 100Hz (10.00 ms Frame Time)

100Hz Refresh Rate Test

Check whether your display is really running at 100Hz, and see what 100Hz means in frame time and smoothness.

A 100Hz display refreshes 100 times per second, showing a new frame every 10.00 ms, 1.7× as often as a 60Hz screen.

Current FPS

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Frames in the last second

Refresh rate

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Nearest standard rate

Average FPS

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Since the test started

1% low FPS

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Slowest 1% of frames

Frame time

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Typical (median)

Jitter

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Lower is smoother

Dropped frames

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Frames that arrived late

Frames

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Measured so far

FPS over the last 10 seconds. The dashed line is your refresh rate; red marks are dropped frames.

Speed

Stress test: 0 moving marbles

Adds drawing work to every frame. Raise it until the FPS drops to see how much your device can draw at full speed.

100Hz in numbers

Refreshes per second	100
Time per frame	10.00 ms
Compared with 60Hz	1.67× as many frames, 6.67 ms less per frame
FPS needed to use every refresh	100
Half-rate V-Sync cap	50 FPS

Is 100Hz good?

Yes, as a modest step up from 60Hz. Scrolling and motion look noticeably smoother, though competitive players usually aim for 144Hz or more.

You'll find 100Hz on many ultrawide and budget monitors.

Getting a steady 100Hz

Choose 100Hz in your operating system's display settings; many monitors ship set to 60Hz.
Use a cable and port with enough bandwidth. High refresh rates at high resolutions usually need DisplayPort or HDMI 2.1.
In games, aim for at least 100 FPS, or turn on G-Sync/FreeSync so lower frame rates still look smooth.
Run the test above: the refresh rate box should read 100 Hz with low jitter.

Other refresh rates

Refresh rate	Frame time	vs 60Hz
60Hz	16.67 ms	1.00×
75Hz	13.33 ms	1.25×
90Hz	11.11 ms	1.50×
100Hz	10.00 ms	1.67×
120Hz	8.33 ms	2.00×
144Hz	6.94 ms	2.40×
165Hz	6.06 ms	2.75×
180Hz	5.56 ms	3.00×
240Hz	4.17 ms	4.00×
360Hz	2.78 ms	6.00×
480Hz	2.08 ms	8.00×

Frequently asked questions

What is the frame time at 100Hz?

At 100Hz a new frame appears every 10.00 ms (1000 ÷ 100).

Is 100Hz good for gaming?

Yes, as a modest step up from 60Hz. Scrolling and motion look noticeably smoother, though competitive players usually aim for 144Hz or more.

How many FPS do I need for 100Hz?

To use every refresh, your game should render at least 100 frames per second. Below that, the monitor shows some frames twice; variable refresh rate (G-Sync or FreeSync) keeps that smooth.

How do I check if my monitor is running at 100Hz?

Run the test on this page: the "Refresh rate" box shows the rate your display is actually using. If it reads lower than 100Hz, select 100Hz in your display settings and check that your cable supports it.