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Kilowatt Hour To Joule Calculator

Work out kilowatt hour to joule instantly with clear inputs, formula shown and shareable results.

About Kilowatt Hour To Joule Calculator

Converting Kilowatt-hours to Joules is one multiplication: a single kWh is 3600000 J, so the amount is scaled by that factor. Reversing the direction divides by the same factor. The factor is an exact definition rather than a rounded figure, so the result stays precise at any magnitude. A watt is one joule per second, so one kilowatt sustained for 3,600 seconds is 3.6 million joules exactly.

Formulas

Kilowatt-hours → Joules

J = kWh × 3600000

Joules → Kilowatt-hours

kWh = J ÷ 3600000

Worked example

With the default values below, Kilowatt Hour To Joule Calculator returns Converted Value of 3,600,000.00. Change any input above and every figure here is recalculated in your browser.

Inputs used

Amount to convert
1
Directionone of Kilowatt-hours → Joules, Joules → Kilowatt-hours
Kilowatt-hours → Joules

Results

Converted Value
3,600,000.00
Result Unit
J
Multiplier Applied
3,600,000.00000000
Conversion Used
1 kWh = 3600000 J

Step by step

  1. 1Values used
  2. 2Kilowatt-hours → Joules
  3. 3Joules → Kilowatt-hours
  4. 4Converted Value= 3,600,000.00
  5. 5Result Unit= J
  6. 6Multiplier Applied= 3,600,000.00000000
  7. 7Conversion Used= 1 kWh = 3600000 J

Assumptions and limits

  • The result is derived only from the 2 inputs listed above. Anything not among them is not part of the calculation.
  • In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
  • Figures are rounded for display to 8 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Frequently Asked Questions

How many J are in one kWh?

One kWh equals 3600000 J. That value is exact by definition.

How do I go from Joules back to Kilowatt-hours?

Divide by 3600000 rather than multiplying, or flip the direction selector which does it for you.

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