FPS Calculator (Frames Per Second)

This is a frames per second calculator, not a feet per second one. Enter a frame count and the seconds it took and it returns the average frame rate, or enter a frame rate to get the time a single frame occupies in milliseconds. A third mode puts a frame rate next to a screen refresh rate and reports the spare time inside each refresh interval. It only ever describes the average across the window you give it, so it cannot show stutter or one percent lows.