Bolt Circle Calculator
This Bolt Circle Calculator is for determining the X/Y coordinates relative to the center of a circle. These coordinates can then be used to drill holes, etc, around a radius.

To get the coordinates: Enter the radius of the circle, orient X and Y-Axes with the "Switch" buttons, enter the degrees that the coordinate points are to be at on the circle*, then click "Calculate".
Image
Y  +
Image X  +








Coordinate Point Degrees:
1 2 3 4 5 6
X
Y
X
Y
X
Y
X
Y
X
Y
X
Y

*Only enter degrees on the number of points that you wish to receive X/Y coordinates. The coordinates will be shown below the entered degrees. If more than 6 points are needed, Calculate the first 6, print the page, then enter the others.

The degrees shown around the circle only show the orientation. 0 degrees is the front of the circle and they continue around clockwise from there. Those numbers 0, 90, 180, and 270 do not change with the degrees you enter.

A Shaft Keyway Depth Calculator and More handy Calculators can be found by clicking the Shop Aides menu item!

Note: Great care has been made to make sure this calculator is accurate. However, due to human error, the user agrees to accept full responsibility to verify that the calculated results meet their requirements before using them.