Alkalinity determination, including an alkalinity determination process and/or alkalinity determinator. An alkalinity determination process may include providing a known value of volume of an acidic fluid, forming a titration system by providing one or more additions of a known value of volume of a relatively alkaline fluid to an acidic fluid, determining a pH value and/or a temperature value for one or more additions and/or determining an alkalinity value of a system by calculating a transformation including one or more determined pH values and/or temperature values of one or more additions. An alkalinity determination process may include modeling, such that an informed determination may be made with reference to relevant and/or irrelevant factors, as well as parameters to maximize likelihood of alkalinity determination. In embodiments, an alkalinity determinator may include one or more titration cells, one or more sensors and/or one or more alkalinity value determinators.