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In the early stages of a project, the process engineering or pump and motor engineering team usually needs to provide the motor power to the electrical engineering team as input data for their design work. If samples from certain manufacturers are available, those can be used as references; if no such samples are available, this calculation table can be employed to estimate the pump’s power. Additionally, when receiving quotes from manufacturers, it is possible to verify whether the calculations provided are universally applicable. To use this table, a basic understanding of pumps is required. Instructions: 1. Flow rate, head, and specific gravity are the required input values; the rotation speed can be entered optionally. If it is not known, 2950 RPM can be chosen directly. Efficiency and motor power are calculated automatically, with power margin in accordance with API610. The method for calculating efficiency is shown in Figure 2 below. 2. The applicable range is single-stage, single-suction pumps with Ns(US) ≤ 3000 and a power level of ≤ 1800 KW (as the maximum value in the database is 1800 KW). 3. During the early stages of a project, such as the feasibility study phase, the preliminary design phase, or the FEED stage, when manufacturer data is not available, this calculation table can be used to estimate the motor power approximately; it is for reference only. The interface is as follows: