Joule to Kilowatt-Hour

Convert joule to kilowatt-hour instantly. Type in either field — results update live.

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Energy Joule Kilowatt-Hour

1 joule = 2.777778e-7 kilowatt-hours

From

Format

Conversion table

Selected J values converted to kW·h using the exact factor from this tool.

J	kW·h
0.01	2.777778e-9
0.1	2.777778e-8
1	2.777778e-7
2	5.555556e-7
3	8.333333e-7
5	0.0000013889
10	0.0000027778
20	0.0000055556
50	0.0000138889
100	0.0000277778
1,000	0.0002777778

How to convert

Exact conversion factors in both directions, plus a worked example.

1 J = 2.777777778e-7 kW·h

1 kW·h = 3600000 J

To convert joule to kilowatt-hour, multiply by 2.777777778e-7.

To convert kilowatt-hour to joule, multiply by 3600000.

Example: convert 10 J to kW·h

10 × 2.777777778e-7 = 0.0000027778 kW·h

About these units

Short background on the units used in this conversion.

Joule (J)

The joule is the SI unit of energy — the work done when one newton moves an object one meter.

Joules quantify electricity bills (as kWh), food energy (as kcal), and scientific energy transfers.

Kilowatt-Hour (kW·h)

A kilowatt-hour is the energy delivered by one kilowatt of power running for one hour — exactly 3.6 megajoules.

Kilowatt-hours bill household electricity, size battery storage, and rate solar panel output.

Frequently asked questions

How many kilowatt-hours are in one joule?

One joule equals 2.777778e-7 kilowatt-hours. Multiply your joules value by 2.777778e-7 to convert to kilowatt-hours.

What is the conversion formula?

kW·h = J × 2.777778e-7

The reverse is J = kW·h × 3,600,000, using the same exact factors as this converter.

Is this Joule to Kilowatt-Hour converter private?

Yes. All calculations run locally in your browser. Nothing you type is sent to a server.

All joule conversions

Jump to any energy conversion starting from joule — including the reverse direction and every other unit in our dataset.

kilowatt-hour (kW·h) → joule (J)

joule (J) → kilojoule (kJ)joule (J) → megajoule (MJ)joule (J) → gigajoule (GJ)joule (J) → watt-hour (W·h)joule (J) → calorie (nutritional / food calorie) (Cal)joule (J) → kilocalorie (it) (kcal (IT))joule (J) → kilocalorie (thermochemical) (kcal (th))joule (J) → calorie (it) (cal (IT))joule (J) → calorie (thermochemical) (cal (th))joule (J) → british thermal unit (it) (Btu (IT))joule (J) → british thermal unit (thermochemical) (Btu (th))joule (J) → foot-pound (ft·lbf)joule (J) → newton meter (N·m)joule (J) → horsepower hour (mechanical) (hp·h)joule (J) → horsepower (metric) hour (metric hp·h)joule (J) → millijoule (mJ)joule (J) → microjoule (µJ)joule (J) → nanojoule (nJ)joule (J) → attojoule (aJ)joule (J) → megaelectron-volt (MeV)joule (J) → kiloelectron-volt (keV)joule (J) → electron-volt (eV)joule (J) → erg joule (J) → gigawatt-hour (GW·h)joule (J) → megawatt-hour (MW·h)joule (J) → kilowatt-second (kW·s)joule (J) → watt-second (W·s)joule (J) → mega british thermal unit (it) (MBtu (IT))joule (J) → ton-hour (refrigeration) (ton·h)joule (J) → fuel oil equivalent @ kiloliter (kL oil eq)joule (J) → fuel oil equivalent @ barrel (us) (bbl oil eq)joule (J) → gigaton (tnt) (Gton)joule (J) → megaton (tnt) (Mton)joule (J) → kiloton (tnt) (kton)joule (J) → ton (explosives / tnt) (ton TNT)joule (J) → dyne centimeter (dyn·cm)joule (J) → gram-force meter (gf·m)joule (J) → gram-force centimeter (gf·cm)joule (J) → kilogram-force centimeter (kgf·cm)joule (J) → kilogram-force meter (kgf·m)joule (J) → kilopond meter (kp·m)joule (J) → pound-force foot (lbf·ft)joule (J) → pound-force inch (lbf·in)joule (J) → ounce-force inch (ozf·in)joule (J) → inch-pound (in·lbf)joule (J) → inch-ounce (in·ozf)joule (J) → poundal foot (pdl·ft)joule (J) → therm joule (J) → therm (ec)joule (J) → therm (us)joule (J) → hartree energy (Eh)joule (J) → rydberg constant (Ry)