W to kW
Convert W to kW. Enter a value and view the calculation method, examples and conversion table.
Power converter
W to kW formula
The calculator converts the input to the category's reference unit, then divides by the target unit's factor.
Result = input × source factor ÷ target factor
1 × (1 ÷ 1,000) = 0.001
Worked example: 1 Watts = 0.001 Kilowatts
Auto mode preserves significant digits for small values; manual mode rounds to the selected decimal places. ≈ means approximate; < means below the display limit. Extreme values use × 10ⁿ. Calculations are rounded only for display.
W to kW conversion table
| Watts | Kilowatts |
|---|---|
| 1 Watts | 0.001 Kilowatts |
| 2 Watts | 0.002 Kilowatts |
| 5 Watts | 0.005 Kilowatts |
| 10 Watts | 0.01 Kilowatts |
| 20 Watts | 0.02 Kilowatts |
| 50 Watts | 0.05 Kilowatts |
| 100 Watts | 0.1 Kilowatts |
| 250 Watts | 0.25 Kilowatts |
| 500 Watts | 0.5 Kilowatts |
| 1,000 Watts | 1 Kilowatts |
Definitions and assumptions
Power is energy transferred per unit time, expressed here relative to watts. Mechanical, metric, electrical and boiler horsepower have different definitions and are separate choices.
How to use this calculator
- Enter the value you want to convert.
- Choose the source and target units, then adjust the display precision if needed.
- Read the result. Select Convert to open a page for this value, or use the table below.
Frequently asked questions
how many kW is 1 W?
1 Watts = 0.001 Kilowatts. Auto mode preserves significant digits for small values; manual mode rounds to the selected decimal places. ≈ means approximate; < means below the display limit. Extreme values use × 10ⁿ. Calculations are rounded only for display.
how to convert W to kW?
The calculator converts the input to the category's reference unit, then divides by the target unit's factor. 1 × 0.001 ≈ 0.001 Kilowatts. Use the source and target factors shown in the formula. The worked example uses the value on this page, and the table provides other common values.
Why do horsepower results differ?
Mechanical horsepower, metric horsepower, electrical horsepower and boiler horsepower use different definitions. Select the definition matching your source document.
Why is the displayed result rounded?
Auto mode preserves significant digits for small values; manual mode rounds to the selected decimal places. ≈ means approximate; < means below the display limit. Extreme values use × 10ⁿ. Calculations are rounded only for display.
What input range can I use?
This calculator accepts non-negative values up to 1 trillion, with up to 8 decimal places. It does not calculate signed vectors or calendar date intervals.
Why is a unit unavailable?
A conversion is unavailable when a verified unit definition or a current exchange-rate value has not been configured. The tool does not invent a coefficient.
Sources and methodology
Methods and sources · Content revised
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