Accessible from desktop, tablet, or other device, 90.1 ECB web application leverages Energy Cost Budget (ECB) method to automate calculations needed to show building project compliance with ANSI/ASHRAE/IES 90.1-2010, Energy Standard for Buildings Except Low-Rise Residential Buildings. Modeling compliance tool lets users input project parameters and calculates proposed design's projected performance and compliance. Results may be exported in workable spreadsheet for project use.