How to use this tool
Check the units, enter your values, and run the tool. Results follow the assumptions and method below.
Calculation method
Area inside outer circle only
pi*outer^2-outer^2*acos((distance^2+outer^2-inner^2)/(2*distance*outer))-inner^2*acos((distance^2+inner^2-outer^2)/(2*distance*inner))+sqrt((-distance+outer+inner)*(distance+outer-inner)*(distance-outer+inner)*(distance+outer+inner))/2