Accurately convert joules to watt-hours and vice versa with Experience fast conversions by entering your data.

Conversion Factors:

  • Joules to Watt-hours: 1 watt-hour = 3600 joules
  • Watt-hours to Joules: 1 joule = 1/3600 watt-hours

How to Convert Joules to Watt-hours:

To convert joules to watt-hours, divide the number of joules by 3600.

Watt-hours = Joules/3600


Convert 7200 joules to watt-hours.

Watt-hours = 7200/3600 = 2 Wh

How to Convert Watt-hours to Joules:

To convert watt-hours to joules, multiply the number of watt-hours by 3600.

Joules = Watt-hours×3600


Convert 5 watt-hours to joules.

Joules = 5×3600 = 18000 J

Joule to Watt-hour Conversion Table

Joules (J)Watt-hours (Wh)
1 J0.000278 Wh
2 J0.000556 Wh
3 J0.000833 Wh
4 J0.001111 Wh
5 J0.001389 Wh
6 J0.001667 Wh
7 J0.001944 Wh
8 J0.002222 Wh
9 J0.002500 Wh
10 J0.002778 Wh
20 J0.005556 Wh
30 J0.008333 Wh
40 J0.011111 Wh
50 J0.013889 Wh
60 J0.016667 Wh
70 J0.019444 Wh
80 J0.022222 Wh
90 J0.025000 Wh
100 J0.027778 Wh

J to Wh Conversion Chart

Watt-hour to Joule Conversion Table

Watt-hours (Wh)Joules (J)
1 Wh3600 J
2 Wh7200 J
3 Wh10800 J
4 Wh14400 J
5 Wh18000 J
6 Wh21600 J
7 Wh25200 J
8 Wh28800 J
9 Wh32400 J
10 Wh36000 J
20 Wh72000 J
30 Wh108000 J
40 Wh144000 J
50 Wh180000 J
60 Wh216000 J
70 Wh252000 J
80 Wh288000 J
90 Wh324000 J
100 Wh360000 J

Wh to J Conversion Chart

Difference Between Joule to Watt-hour

AspectJoule (J)Watt-hour (Wh)
DefinitionA unit of energy in the International System of Units (SI).A unit of energy equivalent to one watt of power used for one hour.
Conversion Factor1 Joule = 0.000278 Watt-hours1 Watt-hour = 3600 Joules
UsageCommonly used in physics and engineering.Commonly used in electrical energy and power consumption.
Measurement ContextMeasures energy in physical processes.Measures energy used or produced over time.
Common ApplicationUsed to quantify work, heat, and energy transfer.Used to indicate electrical energy usage, such as in batteries and electricity bills.
ScaleSmaller unit suitable for detailed scientific calculations.Larger unit, more practical for everyday energy consumption measurement.
OriginNamed after James Prescott Joule, an English physicist.Derived from the watt, a unit named after James Watt, and combined with the time unit hour.

1. Solved Examples on Converting Joule to Watt-hour

Example 1:

Convert 1800 joules to watt-hours.

Watt-hours = 1800/3600 = 0.5 Wh

Example 2:

Convert 7200 joules to watt-hours.

Watt-hours = 7200/3600 = 2 Wh

Example 3:

Convert 5400 joules to watt-hours.

Watt-hours = 5400/3600 = 1.5 Wh

Example 4:

Convert 9000 joules to watt-hours.

Watt-hours = 9000/3600 = 2.5 Wh

Example 5:

Convert 10800 joules to watt-hours.

Watt-hours = 10800/3600 = 3 Wh

2. Solved Examples on Converting Watt-hours to Joules

Example 1:

Convert 1 watt-hour to joules.

Joules = 1×3600 = 3600 J

Example 2:

Convert 3 watt-hours to joules.

Joules = 3×3600 = 10800 J

Example 3:

Convert 5 watt-hours to joules.

Joules = 5×3600 = 18000 J

Example 4:

Convert 7 watt-hours to joules.

Joules = 7×3600 = 25200 J

Example 5:

Convert 10 watt-hours to joules.

Joules = 10×3600 = 36000 J

How can I use joule to watt-hour conversions in real life?

Joule to watt-hour conversions are commonly used in calculating electricity usage, such as determining how much energy an electrical appliance consumes over time.

What tools can I use to convert joules to watt-hours?

There are many tools available for converting joules to watt-hours, including online calculators, mobile apps, and conversion charts.

How can I ensure accurate conversions from joules to watt-hours?

To ensure accuracy, use precise measurements and reliable tools or formulas. Double-check calculations to avoid errors, especially when dealing with large quantities of energy.

Can I use joules and watt-hours interchangeably?

While joules and watt-hours both measure energy, they are not interchangeable without conversion because 1 watt-hour equals 3600 joules. The appropriate unit depends on the context—watt-hours are commonly used in electrical energy, while joules are used in scientific and engineering contexts.

Why do we need to convert joules to watt-hours?

Converting joules to watt-hours is useful in electrical and power applications where energy consumption over time needs to be measured, such as in calculating electricity usage.

How does converting joules to watt-hours assist in scientific research?

In scientific research, converting joules to watt-hours can help in standardizing measurements and comparing energy usage across different experiments and applications, especially in fields like physics and engineering.