Frame Time Calculator: Refresh Rate Hz vs FPS in ms
Frame time = 1,000 ÷ FPS: 60 FPS = 16.7 ms, 144 FPS = 6.9 ms, 240 FPS = 4.2 ms. Compare your monitor's refresh rate (Hz) with your frame rate.
Frame time and refresh rate: the 1000 / Hz formula explained
The time between two refreshes of a monitor is 1000 divided by its refresh rate in hertz: 6.94 ms at 144 Hz and 16.67 ms at 60 Hz. The same calculation applied to frames per second gives the GPU frame time, for example 5.00 ms at 200 FPS.
Frame time by FPS
| FPS (or Hz) | Frame time |
|---|---|
| 30 | 33.3 ms |
| 60 | 16.7 ms |
| 75 | 13.3 ms |
| 100 | 10 ms |
| 120 | 8.3 ms |
| 144 | 6.9 ms |
| 165 | 6.1 ms |
| 200 | 5 ms |
| 240 | 4.2 ms |
| 360 | 2.8 ms |
| 500 | 2 ms |
Frame time = 1,000 ÷ FPS, in milliseconds.
Formulas used
- Time per monitor refresh:
1000 / refresh rate (Hz), in milliseconds. - GPU frame time:
1000 / FPS(FPS are floored at 1). - Gain compared with a 60 Hz monitor:
16.67 − 1000 / refresh rate, never negative.
Example
A 144 Hz monitor refreshes every 6.94 ms. A game running at 200 FPS renders a frame every 5.00 ms, faster than the monitor can show them. Compared with a 60 Hz screen (16.67 ms), the interval between refreshes is 9.72 ms shorter. At the same 200 FPS, a 240 Hz monitor drops to 4.17 ms (a 12.50 ms gain) and a 360 Hz monitor to 2.78 ms.
What the calculation leaves out
The displayed gain is only the difference in refresh interval. Real click-to-photon latency also includes mouse polling, game and driver processing and pixel response time, none of which the tool models. FPS are entered as an average, so frame-to-frame stutter can remain visible even with a high average. When FPS exceed the refresh rate, not every extra frame is shown in full; sync technologies (V-Sync, G-Sync, FreeSync) change this and are not modelled. Values are rounded to two decimals.
Frequently Asked Questions
How many milliseconds is one frame at 144 Hz?
1000 / 144 = 6.94 ms between refreshes. At 60 Hz the interval is 16.67 ms, at 240 Hz 4.17 ms.
Do I need more FPS than my refresh rate?
A 144 Hz monitor shows at most 144 refreshes per second. Higher FPS shorten the render time of each frame, but surplus frames are not all shown in full, which can cause tearing without sync.
How much does a 240 Hz monitor gain over 144 Hz?
The interval drops from 6.94 ms to 4.17 ms, 2.78 ms less per refresh. Total click-to-screen latency also depends on the mouse, the game and the panel.
How do I convert FPS to frame time?
Divide 1000 by the frames per second: 200 FPS gives 5.00 ms, 100 FPS gives 10 ms and 30 FPS about 33.33 ms.
Is this tool really free?
Yes, all tools on Kristools are 100% free and accessible without registration.
Is my data protected?
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