Watts to kW Converter

How to Convert Watts to kW

The formula is kilowatts = watts ÷ 1,000. 1 watt = 0.001 kilowatts. Type any value in the converter above for an instant answer, or use the chart below for the most common values.

This page is preset for watt to kilowatt conversions, but you can switch either list to any of the 76 units in the Power Converter, or go the other way with the kW to Watts converter.

Watts to kW conversion chart

Common Watts to kW conversions

• 1 watt = 0.001 kilowatts
• 100 W = 0.1 kW
• 600 W = 0.6 kW
• 1,000 W = 1 kW
• 1,500 W = 1.5 kW
• 2,000 W = 2 kW

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Watts to Kilowatts on Appliance Labels and Electricity Bills

Appliances are rated in watts, while electricity is billed in kilowatt-hours, so converting watts to kilowatts is the first step in working out running costs. Divide by 1,000: a 600 W microwave is 0.6 kW, a 2,000 W kettle is 2 kW, and a 400 W solar panel is 0.4 kW.

To estimate energy use, multiply kilowatts by the hours of use: a 2 kW heater running for 3 hours uses 6 kWh, and at 0.25 per kWh it costs 1.50. Remember that kW measures power at a moment, while kWh measures energy over time.

Solar systems are sized the same way: ten 400 W panels make a 4 kW system. Its daily output in kWh depends on sunshine hours, so a 4 kW system in a location averaging 4 peak sun hours produces roughly 16 kWh per day before losses.

• 1 kW = 1,000 W.
• Horsepower ratings? Use Watts to HP.
• Air conditioner in BTU/hr? Use BTU to Watts.

How to Use the Watts to kW Converter

1. Type a value in the From box and choose its unit.
2. Pick the unit you want in the To list — the result updates as you type.
3. Use the swap button to reverse the conversion, or type in the To box to convert backwards.
4. Check the All conversions table to see your value in every unit; click a row to make it the target.

Frequently Asked Questions