Joule to Kilowatt Hour Converter
Energy · unit-converter
Convert Joule to Kilowatt Hour with fixed input and output units, a step-by-step formula line, and reference tables. Factors are joule-based; food energy uses thermochemical calories. The full Energy Converter also includes MMBtu, toe, thermal kWh, and MeV/GeV.
Calculator
From: Joule (j)
To: Kilowatt Hour (kwh)
About Joule
The joule is the SI unit of energy. All other units here are converted through fixed joule equivalents.
About Kilowatt Hour
One kilowatt-hour is the energy from 1 kW of power for one hour: 1 kWh = 3,600,000 J. Utility bills and battery specs often use kWh.
How to convert joules to kilowatt hours
1 joule is equal to 2.77777778e-7 kilowatt hour when both are expressed in joule-equivalents:
1 j = (1 J ÷ 3,600,000 J) kwh = 2.77777778e-7 kwh
Each joule is defined as 1 J and each kilowatt hour as 3,600,000 J in this tool, so one j equals 1 ÷ 3,600,000 kwh = 2.77777778e-7 kwh.
Let d(j) be the numeric amount in Joule (j), and d(kwh) the amount in Kilowatt Hour (kwh). Then:
d(kwh) = d(j) × (1 / 3,600,000)
Equivalently, divide by how many j fit into one kwh (joules per kwh divided by joules per j):
d(kwh) = d(j) ÷ 3600000
Or: kilowatt hour = joule ÷ 3600000
Examples
Example #1: Convert 1 j to kilowatt hour
1 j = 1 j × (1/3,600,000) kwh = 0.0000002778 kwh
1 j = 1 j ÷ 3600000 = 0.0000002778 kwh
Example #2: Convert 10 j to kilowatt hour
10 j = 10 j × (1/3,600,000) kwh = 0.0000027778 kwh
10 j = 10 j ÷ 3600000 = 0.0000027778 kwh
Summary
To convert Joule to Kilowatt Hour, multiply the value in j by the ratio of joules per j divided by joules per kwh. Equivalently: value_kwh = value_j × (1 / 3600000). Numerically, 1 j equals 2.7777777777777776e-7 kwh.
Relationship context
You are converting between SI energy (joules) (Joules) and electrical energy (watt-hours) (Kilowatt Hours). All values are mapped through joules first. The numeric factor is 2.777778e-7.
Conversion tables
| Joule (j) | Kilowatt Hour (kwh) |
|---|---|
| 0.1 | 0.0000000278 |
| 1 | 0.0000002778 |
| 2 | 0.0000005556 |
| 3 | 0.0000008333 |
| 4 | 0.0000011111 |
| 5 | 0.0000013889 |
| 6 | 0.0000016667 |
| 7 | 0.0000019444 |
| 8 | 0.0000022222 |
| 9 | 0.0000025 |
| Joule (j) | Kilowatt Hour (kwh) |
|---|---|
| 10 | 0.0000027778 |
| 20 | 0.0000055556 |
| 30 | 0.0000083333 |
| 40 | 0.0000111111 |
| 50 | 0.0000138889 |
| 60 | 0.0000166667 |
| 70 | 0.0000194444 |
| 80 | 0.0000222222 |
| 90 | 0.000025 |
| 100 | 0.0000277778 |