Watt to Kilojoule per hour Converter (and vice versa)
Created by: tinycalcs.com/en
Number of supported units: 2
Last update: 2026
This converter allows you to convert watts [W] to kilojoules per hour [kJ/h] or kilojoules per hour [kJ/h] to watts [W]. Calculations are performed in both directions. The calculation result and the entered value are displayed with up to 20 decimal places for maximum accuracy.
Convert watts to kilojoules per hour
There are two simple ways to convert watts [W] to kilojoules per hour [kJ/h]. In the first calculation method, the value in watts [W] is divided by the rounded conversion factor of 0.2778. The second method multiplies the value in watts [W] by 3.6.
- Kilojoules per hour [kJ/h] ≈ watts [W] ÷ 0.2778
- Kilojoules per hour [kJ/h] = watts [W] * 3.6
The calculation method with a rounded conversion value is more suitable for rough conversions from watts [W] to kilojoules per hour [kJ/h], as the calculation result may contain rounding errors. Therefore, the variant with the exact conversion factor is more suitable.
Convert kilojoules per hour to watts
Converting kilojoules per hour [kJ/h] to watts [W] is easy and can be done in two ways. The first method involves multiplication, in which the value in kilojoules per hour [kJ/h] is multiplied by the rounded conversion factor of 0.2778. The second variant is a division. Here, the value in kilojoules per hour [kJ/h] is divided by 3.6.
- Watts [W] ≈ kilojoules per hour [kJ/h] * 0.2778
- Watts [W] = kilojoules per hour [kJ/h] ÷ 3.6
The rounded conversion value can cause rounding errors, resulting in inaccurate calculation results. To ensure that the conversion from kilojoules per hour [kJ/h] to watts [W] produces the most accurate calculation result possible, the conversion should be performed using the exact conversion factor.
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Watts
Kilojoules per minute
Watts
Kilojoules per second
Watts
Kilowatts
Watts
Mechanical horsepower
Watts
Megawatts
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