Ekigerageranyo kya kiromiita oba mailo buli ssaawa kiwa obuwanvo(=obuwanvu bw’olugendo) olutambuddwa buli namunigina ya kiseera(per unit of time). Ebikunizo ebikozesa ekika ky’ekigerageranyo nga kino, biyinza okubazibwa okuyita mu kweyambisa omugendaganyo(proportion), oba ekibalanguzo(formula).