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The short answer is - one horse power, or 746 watts.

But machines do not have 100% conversion efficiency so the electric power taken by a motor is more than the mechanical power output. Electric motors are made more efficient at the higher powers, so while a 1 HP motor might have an efficiency of 80%, a 10 HP motor might have an efficiency of 90% and a 100 Hp motor 97%. This is a matter of design because the higher-power motor needs to waste less of the total power, so it is given thicker wire and a more massive magnetic core (proportional to power) than a small motor.

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