Baluster Calc Elite is an industry leading tool and calculator designed to simplify solving baluster spacing measurements for handrails (both flat and on a rake). Flat Railing (inputs): -Max baluster spacing -Baluster width -Run length Flat Railing (outputs): -Number of balusters -Space between centers -Number of spaces -Space between balusters -Measurements for marking centers of each baluster Stair Railing (inputs): -Max baluster spacing -Baluster width -Run length (on rake) -Rake angle, stair rise, stair run, or stair run/stair rise Stair Railing (outputs): -Number of balusters -Space between centers (on rake) -Number of spaces -Space between balusters (on rake) -Space between balusters -Measurements for marking centers of each baluster Preference settings for easily switching between inches, centimeters, and millimeters for all dimensions. If you are not 100% satisfied with this calculator please email us at [email protected] so we can make things right before posting any negative reviews. We read all emails. We are also open to any suggestions you may have for future enhancements to this app.