Calculate Coordinates of Targets on a Circle
A useful interactive application that calculates the coordinates of equidistant points on a circle. Perfect for working out where to place targets / images in visual world or visual search paradigms. Input the desired number of points / coordinates and adjust the radius. By default, the radius value is degrees of visual angle, in which case the correct screen width and distance should be entered. The radius units can be changed to mm or pixels. The points can be rotated by adjusting the Start Degree value. The center coordinates of the circle can also be adjusted. The output is a list of coordinates that can be copied for use in Experiment Builder and other stimulus presentation software.
Note: The connection to the calculator will close after a few minutes of inactivity – just refresh the page and it will be back!
If you’ve found this calculator helpful, why not find out more about eye tracking, and how it can help your research.
We also have calculators for computing the coordinates of targets in a grid, for computing degrees of visual angle, and for computing the location of calibration targets – give them a try!