# How much electricity does an electric motor use?

**electrical**power, so in theory a 5HP

**motor**operating at 100% efficiency will consume about 3.728kW of power. In one hour, it will

**use**3728.5 kilowatt-hours. Of course, no

**motor**is 100% efficiency, so the

**motor**will actually consume somewhat more power than this.

Keeping this in view, how much power does an electric motor use?

W is the **power** consumption in watts. For example, if the **electric motor uses** 50 amps at 240 volts, the wattage is 50 x 240 x 1.73, or 20,760 watts. **Electricity** costs are based on kilowatts (kW), so divide watts by 1000 to convert to kilowatts (20,760 wats/1000 = 20.76 kW). Record the time the **motor** is in operation.

**$48,000**per year to operate at an electric rate of

**$0.10**per kWh.

In this regard, how much does it cost to run an electric motor?

Here is a breakdown of **how much** one 200 hp, 1,800 rpm and 460 V TEFC **motor costs** in power in a calendar year (7,200 hours of operation): **Average cost** of power in the United States: $. 068/kWh. Annual Power **Cost**: $70,669.

So divide the output (**50 HP**) by the efficiency (0.92), to get the energy required to be input into the **motor**, to get **50 HP**. So --- 37,300 Watts / 0.92 = ~ 40,500 Watts is required to be input to the **motor** to get the **50 HP** output.