In the paper a new procedure based on the simple arithmetic operations for location and quantification of damage in beams using incomplete static information is presented. The grey system theory is employed to locate damage in beam structure using static displacements for two structural stages. Once the location of damage is known, the damage quantification can be done by comparing the displacement curvatures of intact and damage stage of structure. The set of numerical simulations on simply supported beam is conducted to determine the damage quantification reliability of proposed procedure for different damage severities. Also, the results of laboratory test are employed to verify results obtained by numerical simulations.