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1 mechanical HP = 550 ft·lb/s = 745.7 W. 1 metric HP (PS) = 735.5 W. 1 boiler HP = 9,810 W (very different!). Electrical HP = Volts × Amps × Efficiency / 746. Motor nameplate HP is output power; input power is higher due to motor efficiency (typically 85–95%). HP is commonly used for engines, motors, and vacuum cleaners; kW is the SI unit.
≈ 149.140 kW