This app has been designed by NTPC Ltd. (India’s largest power generating utility) and has modules ranging from conventional power generation to upcoming technologies associated with hydrogen, ammonia, carbon capture, energy storage etc. The modules in the app provide a basic idea of thumb rule calculations for vital parameters associated with a power plant such as fuel, water requirement, emissions etc. and provides sensitivity analysis for the new technologies. This app can help stakeholders in day-to-day activities and provide a broad idea for decision making using macro-parameters and sensitivity analysis features provided in the app. This Engineering Calculator provide thumb rules for Thermal Power, Hydrogen Infrastructure, Nuclear Power Plant Tariff, Steam Temperature variations.