Watts to Kilowatts Converter

How to convert watts to kilowatts

kilowatts = watts ÷ 1,000

The watt is the SI unit of power (one joule per second). 1 kilowatt is 1,000 watts (SI prefix kilo).

The factor is exact in both directions: 1 W = 0.001 kW and 1 kW = 1,000 W. Nothing is rounded until you choose how many decimals to show.

Worked example: 1,500 W

1. Start with the value in watts: 1,500 W.
2. Divide by 1,000, because 1 kilowatt = 1,000 watts: 1,500 ÷ 1,000 = 1.5 kW.

Watts to kilowatts chart

Print chart

Watts from 100 to 10,000 converted to kilowatts with the exact factor, shown to five significant digits.

Watts to kilowatts, part 1 of 4

W	kW
100	0.1
200	0.2
300	0.3
400	0.4
500	0.5
600	0.6
700	0.7
800	0.8
900	0.9
1,000	1
1,100	1.1
1,200	1.2
1,300	1.3
1,400	1.4
1,500	1.5
1,600	1.6
1,700	1.7
1,800	1.8
1,900	1.9
2,000	2
2,100	2.1
2,200	2.2
2,300	2.3
2,400	2.4
2,500	2.5

Watts to kilowatts, part 2 of 4

W	kW
2,600	2.6
2,700	2.7
2,800	2.8
2,900	2.9
3,000	3
3,100	3.1
3,200	3.2
3,300	3.3
3,400	3.4
3,500	3.5
3,600	3.6
3,700	3.7
3,800	3.8
3,900	3.9
4,000	4
4,100	4.1
4,200	4.2
4,300	4.3
4,400	4.4
4,500	4.5
4,600	4.6
4,700	4.7
4,800	4.8
4,900	4.9
5,000	5

Watts to kilowatts, part 3 of 4

W	kW
5,100	5.1
5,200	5.2
5,300	5.3
5,400	5.4
5,500	5.5
5,600	5.6
5,700	5.7
5,800	5.8
5,900	5.9
6,000	6
6,100	6.1
6,200	6.2
6,300	6.3
6,400	6.4
6,500	6.5
6,600	6.6
6,700	6.7
6,800	6.8
6,900	6.9
7,000	7
7,100	7.1
7,200	7.2
7,300	7.3
7,400	7.4
7,500	7.5

Watts to kilowatts, part 4 of 4

W	kW
7,600	7.6
7,700	7.7
7,800	7.8
7,900	7.9
8,000	8
8,100	8.1
8,200	8.2
8,300	8.3
8,400	8.4
8,500	8.5
8,600	8.6
8,700	8.7
8,800	8.8
8,900	8.9
9,000	9
9,100	9.1
9,200	9.2
9,300	9.3
9,400	9.4
9,500	9.5
9,600	9.6
9,700	9.7
9,800	9.8
9,900	9.9
10,000	10

kilowatts = watts ÷ 1,000. Factors: BIPM SI Brochure. unitcheck.net/energy/watts-to-kilowatts/

From kilowatts to kilowatt-hours

Electricity is billed in kilowatt-hours (kWh): power in kilowatts multiplied by the hours it runs. A 1,500 W heater is 1.5 kW; run for 4 hours it uses 1.5 × 4 = 6 kWh. One kilowatt-hour is exactly 3.6 megajoules.