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A Wattage Calculator is a tool designed to help users estimate the electrical power consumption (in watts) of devices, appliances, or entire systems. To use this calculator, you typically input details such as the voltage (V), current (amperes/A), and/or resistance (ohms/Ω) of the electrical component, depending on the available data. Some advanced calculators may also factor in usage duration (hours per day), efficiency ratings, or operational conditions (e.g., standby mode vs. full load). Based on these inputs, the Wattage Calculator provides insights into power requirements, energy costs, and potential savings, aiding in equipment selection, circuit design, or energy-efficient planning for homes, businesses, or industrial setups.