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Joule to Watt-hour

Convert Joule (J) to Watt-hour (Wh)

Please provide values below to convert Joule (J) to Watt-hour (Wh).
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      Updated on September 1, 2025

      About Joule (J) to Watt-hour (Wh) Conversion Calculator

      Written By
      author
      Nadiba Rahman
      Reviewed by
      author
      Mrinmoy Roy
      Share This Post
      You can use our Joule (J) to Watt-hour (Wh) conversion calculator as a reliable and efficient tool to simplify energy conversions. It is designed for professionals, students, and anyone who needs a quick and accurate result. Conversion of Joule (J) to Watt-hour (Wh) is crucial in Physics, Energy related measurements. You can avoid the risk of manual calculation errors and save valuable time using our Joule (J) to Watt-hour (Wh) converter.

      Relation Between Joule (J) and Watt-hour (Wh)

      Let me explain to you about the relation between Joule J and Watt-hour (Wh) first before moving to the conversion process. Because it’s essential to grasp what these units represent.

      What is Joule (J)?

      The joule is the SI unit of energy, defined as the amount of work done when a force of one newton is applied over a distance of one meter. 2 Joule (J) is a unit of energy measurement which is commonly used in Physics, Energy. The joule is the fundamental unit of energy in many scientific and engineering applications..

      What is Watt-hour (Wh)?

      Joule (J) is another unit of energy measurement that is used in Electricity, Power Measurement. A watt-hour is a unit of energy equal to the energy produced by a power of one watt operating for one hour.. The joule is the fundamental unit of energy in many scientific and engineering applications..

      How to Convert Watt-hour (Wh)?

      The conversion between Joule (J) and Watt-hour (Wh) follows a simple formula:

      Joule = Joule × 0.000277777777777778

      Where, 0.000277777777777778 is the value that allows you to convert between Joule (J) and Watt-hour (Wh).

      So,

      1 Watt-hour = 0.000277777777777778 Joule

      And, 1 Joule = 1/0.000277777777777778 Watt-hour
      alt

      Examples of Converting Joule (J) to Watt-hour (Wh)

      To convert any value from Joule (J) to Watt-hour (Wh), simply multiply the amount of Joule (J) by the conversion factor:

      1 Watt-hour = 0.000277777777777778 Joule

      For example, if you want to convert 5 Joule into Watt-hour and the conversion factor is 0.000277777777777778, then:

      5 Joule = 5 x 0.000277777777777778 Watt-hour

      Joule (J) to Watt-hour (Wh) Conversion Chart

      Here’s a quick reference chart for common conversions between Joule (J) and Watt-hour (Wh)
      Joule (J)Watt-hour (Wh)
      5 Joule (J)0.00138888888888889 Watt-hour (Wh)
      10 Joule (J)0.00277777777777778 Watt-hour (Wh)
      15 Joule (J)0.00416666666666667 Watt-hour (Wh)
      20 Joule (J)0.00555555555555556 Watt-hour (Wh)
      25 Joule (J)0.00694444444444445 Watt-hour (Wh)
      30 Joule (J)0.00833333333333334 Watt-hour (Wh)
      35 Joule (J)0.00972222222222223 Watt-hour (Wh)
      40 Joule (J)0.01111111111111112 Watt-hour (Wh)
      45 Joule (J)0.01250000000000001 Watt-hour (Wh)
      50 Joule (J)0.0138888888888889 Watt-hour (Wh)
      You can use the above chart for quick and easy reference.

      How 1 Joule (J) Converts to Other energy Units

      See the relation between Joule (J) and other energy related measurement units:
      1 Joule(J)0.000948 British Thermal Unit (BTU)
      1 Joule(J)0.239006 Calorie (cal)
      1 Joule(J)10000000.000000 Erg (erg)
      1 Joule(J)6241509125883249664.000000 Electronvolt (ev)
      1 Joule(J)0.000000 Exajoule (EJ)
      1 Joule(J)0.737562 Foot-pound (ft lbs)
      1 Joule(J)0.000000 Gigajoule (GJ)
      1 Joule(J)0.000000 Gigawatt-hour (GWh)
      1 Joule(J)0.000239 Kilocalorie (KCal)
      1 Joule(J)0.001000 Kilojoule (KJ)
      1 Joule(J)0.000001 Megajoule (MJ)
      1 Joule(J)0.000000 Megawatt-hour (MWh)
      1 Joule(J)0.000001 Natural Gas Low Heating Value (NG LHV)
      1 Joule(J)1.000000 Newton-meter (Nm)
      1 Joule(J)0.000000 Therms
      1 Joule(J)0.000000 Kilowatt-hour (kwh)
      1 Joule(J)1.000000 Watt-second (Ws)

      Features of Our Joule (J) to Watt-hour (Wh) Conversion Calculator

      Our Joule J to Watt-hour (Wh) converter is more than just a basic converter. Here's what makes it stand out:

      Output Precision Control

      You can control how precise your conversion results are. From settings, you can adjust decimal places from 0 to 12 places.

      Customizable Rounding Options

      You can control the output rounding options based on your necessity. You can turn the rounding mode on or off, and select between Ceiling or Floor rounding to match your needs.

      Multiple Number Formats

      Display your results the way you want:
      1. Standard format (e.g. 12.345245)
      2. Scientific notation (e.g. 1.23452e+1)
      3. Engineering format (e.g. 1.23452 × 10^1)

      Integrated Scientific Calculator

      We know you need to switch between a unit converter and a general calculator back and forth. To minimize your hassle, our Joule J to Watt-hour (Wh) converter comes up with an integrated scientific calculator.

      Conversion History Tracking

      You can always review your past energy conversions and go to them whenever you like. It stores your most recent 10 unit conversions.

      Thousand Separators Toggle

      Our Joule J to Watt-hour (Wh) converter improves the output readability by toggling the thousand separators “On”. It’s useful when you work with large numbers.

      Conclusion

      Now, you understand how to convert Joule J to Watt-hour (Wh) manually. But you can bypass the manual calculation using our energy conversion calculator. This allows you to get faster and accurate results in Watt-hour (Wh), which you can use in Physics, Energy related measurements. With the help of our integrated scientific calculator, calculation history tracking, and precision control, our Joule J to Watt-hour (Wh) converter is your swiss army knife for daily calculations.
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