How to use
- Choose whether you know the frame rate or the frame time.
- Enter the value.
- Enter a second frame rate under Compare with, for example your refresh rate or a target.
- Read the frame time, the frame rate, the compared frame time and the difference.
Formula
- frame time (ms) = 1000 ÷ frame rate (fps)
- frame rate (fps) = 1000 ÷ frame time (ms)
- frames per minute = fps × 60
Example
60 fps compared with 144 fps:
- 1000 ÷ 60 = 16.667 ms per frame;
- 1000 ÷ 144 = 6.944 ms at 144 fps;
- the difference is 9.722 ms per frame; at 60 fps you see 3,600 frames a minute.
Tips
- Budget in milliseconds when optimising: a 2 ms saving means much more at 120 fps than at 30 fps.
- A frame rate cap a little below your refresh rate often gives more even frame times than an uncapped game.
- To check your screen’s real refresh rate, use the refresh rate test.