This calculator determines fixture requirements and occupant load factors using the International Building Code (IBC) 2021, referencing Tables 2902.1 and 1004.5. Per IBC standards, any calculations resulting in a fractional fixture count are rounded up. The urinal calculation is based on the maximum allowed percentage of total male water closets, which is 67% for Assembly/Educational uses and 50% for other types of occupancies. Users should be aware that local amendments and specific project conditions can change the required fixture counts, so it is important to consult a qualified professional.