Watt to Kilowatt Converter
Power · unit-converter
Convert Watt to Kilowatt with a fixed input and output unit, step-by-step formula line, and reference tables. Linear units use SI watt definitions; mechanical hp uses 550 ft·lbf/s; BTU/h uses the IT BTU; dBm/dBW are logarithmic relative to 1 mW and 1 W. The full Power Converter also includes PS/CV, TR, kVA/MVA, and ft·lb/s.
Calculator
From: Watt (w)
To: Kilowatt (kw)
About Watt
The watt is the SI unit of power (one joule per second). All linear units in this converter are defined by a fixed watt equivalent.
About Kilowatt
One kilowatt is 1,000 W. Motor, heater, and grid-scale loads are often rated in kW.
How to convert watts to kilowatts
1 watt is equal to 0.001 kilowatt when both are expressed in watt-equivalents:
1 w = (1 W ÷ 1,000 W) kw = 0.001 kw
Each watt is defined as 1 W and each kilowatt as 1,000 W in this tool, so one w equals 1 ÷ 1,000 kw = 0.001 kw.
Let d(w) be the numeric value in Watt (w), and d(kw) the value in Kilowatt (kw). Then:
d(kw) = d(w) × (1 / 1,000)
Equivalently, divide by how many w fit into one kw (watts per kw divided by watts per w):
d(kw) = d(w) ÷ 1000
Or: kilowatt = watt ÷ 1000
Examples
Example #1: Convert 1 w to kilowatt
1 w = 1 w × (1/1,000) kw = 0.001 kw
1 w = 1 w ÷ 1000 = 0.001 kw
Intermediate watts: 1 W
Example #2: Convert 10 w to kilowatt
10 w = 10 w × (1/1,000) kw = 0.01 kw
10 w = 10 w ÷ 1000 = 0.01 kw
Intermediate watts: 10 W
Summary
To convert Watt to Kilowatt, multiply the value in w by the ratio of watts per w divided by watts per kw. Equivalently: value_kw = value_w × (1 / 1000). Numerically, 1 w equals 0.001 kw.
Relationship context
Both units are SI / decimal power (watts and prefixes). Conversions use fixed watt factors, so results stay consistent with the definitions in this converter. The factor from Watt to Kilowatt is 1.000000e-3 (1 w = 0.001 kw).
Conversion tables
| Watt (w) | Kilowatt (kw) |
|---|---|
| 0.1 | 0.0001 |
| 1 | 0.001 |
| 2 | 0.002 |
| 3 | 0.003 |
| 4 | 0.004 |
| 5 | 0.005 |
| 6 | 0.006 |
| 7 | 0.007 |
| 8 | 0.008 |
| 9 | 0.009 |
| Watt (w) | Kilowatt (kw) |
|---|---|
| 10 | 0.01 |
| 20 | 0.02 |
| 30 | 0.03 |
| 40 | 0.04 |
| 50 | 0.05 |
| 60 | 0.06 |
| 70 | 0.07 |
| 80 | 0.08 |
| 90 | 0.09 |
| 100 | 0.1 |