A very useful interactive visual angle calculator that converts between pixels and degrees. The perfect tool for figuring out where to position objects in your eye tracking task, or how far away your screen should be. Enter your screen resolution, dimensions and distance on the left, then choose the appropriate tab on the right. Use “Centered” for objects centered on the screen (or the screen itself). Use “One Sided” to compute the distance of objects (e.g. targets in saccade tasks) from the screen center. Use “Off Center” to compute the size of objects that are offset from the screen center. Enter degrees of visual angle or pixels on the right – the app converts from pixels to degrees and from degrees to pixels.
The connection to the calculator will close after a few minutes of inactivity – just refresh the page and it will be back! We also have calculators for computing the coordinates of targets targets in a grid or circular array – give them a try!