Help with sums... May 14, 2012 12:40:21 GMT Quote Select PostDeselect PostLink to PostBack to Top Post by bookemdanno on May 14, 2012 12:40:21 GMT Might help in materials estimates...www.calculatorsoup.com/calculators/geometry-solids/sphere.phpDon't forget to halve the results, as it's based on a sphere, not a dome.