Watt to Joule 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 joules per hour [J/h] or joules per hour [J/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.

1 watt [W] = 3,600 joules per hour [J/h]1 joule per hour [J/h] ≈ 2.778 * 10-4 watts [W]

Convert watts to joules per hour

There are two simple ways to convert watts [W] to joules per hour [J/h]. In the first calculation method, the value in watts [W] is divided by the rounded conversion factor of 2.778 * 10-4. The second method multiplies the value in watts [W] by 3,600.

  • Joules per hour [J/h] ≈ watts [W] ÷ (2.778 * 10-4)
  • Joules per hour [J/h] = watts [W] * 3,600

The calculation method with a rounded conversion value is more suitable for rough conversions from watts [W] to joules per hour [J/h], as the calculation result may contain rounding errors. Therefore, the variant with the exact conversion factor is more suitable.


Convert joules per hour to watts

Converting joules per hour [J/h] to watts [W] is easy and can be done in two ways. The first method involves multiplication, in which the value in joules per hour [J/h] is multiplied by the rounded conversion factor of 2.778 * 10-4. The second variant is a division. Here, the value in joules per hour [J/h] is divided by 3,600.

  • Watts [W] ≈ joules per hour [J/h] * 2.778 * 10-4
  • Watts [W] = joules per hour [J/h] ÷ 3,600

The rounded conversion value can cause rounding errors, resulting in inaccurate calculation results. To ensure that the conversion from joules per hour [J/h] to watts [W] produces the most accurate calculation result possible, the conversion should be performed using the exact conversion factor.

Converter

Decimal places

How it's calculated

Factor: 
3,600
Joules per hour=Watts*3,600
Watts=
Joules per hour3,600

To all available units

Watts

Joules per minute

Watts

Joules per second

Watts

Kilocalories per hour

Watts

Kilocalories per minute

Watts

Kilocalories per second

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