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Converting dotstim.speed to actual speed

Hi everyone,

I am trying to understand how to convert the dotstim.speed value to the distance on the screen that the stimulus travels after 1 second.
My dotstim.element is with size of 23 (as I understand it means its radius is 23 pixels)
In the docs it says dotstim.speed is " Speed of the dots (in units /frame)." so the calculation I do is. For a dotstim.speed of 0.001my calculation is 0.001(speed) * 60(screen refresh rate)* 46 (circle diameter) is the distance traveled every 1 second during the experiment. Is this right?

that means every frame the dotstim moves a distance equals to the speed* the size?