Kilowatt Hour to Kilojoule Converter
Energy · unit-converter
Convert Kilowatt Hour to Kilojoule 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: Kilowatt Hour (kwh)
To: Kilojoule (kj)
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.
About Kilojoule
One kilojoule is 1,000 J. Scientific and engineering contexts often use kJ alongside joules.
How to convert kilowatt hours to kilojoules
1 kilowatt hour is equal to 3600 kilojoule when both are expressed in joule-equivalents:
1 kwh = (3,600,000 J ÷ 1,000 J) kj = 3600 kj
Each kilowatt hour is defined as 3,600,000 J and each kilojoule as 1,000 J in this tool, so one kwh equals 3,600,000 ÷ 1,000 kj = 3600 kj.
Let d(kwh) be the numeric amount in Kilowatt Hour (kwh), and d(kj) the amount in Kilojoule (kj). Then:
d(kj) = d(kwh) × (3,600,000 / 1,000)
Equivalently, divide by how many kwh fit into one kj (joules per kj divided by joules per kwh):
d(kj) = d(kwh) ÷ 0.00027777777778
Or: kilojoule = kilowatt hour ÷ 0.00027777777778
Examples
Example #1: Convert 1 kwh to kilojoule
1 kwh = 1 kwh × (3,600,000/1,000) kj = 3600 kj
1 kwh = 1 kwh ÷ 0.00027777777778 = 3600 kj
Example #2: Convert 10 kwh to kilojoule
10 kwh = 10 kwh × (3,600,000/1,000) kj = 36000 kj
10 kwh = 10 kwh ÷ 0.00027777777778 = 36000 kj
Summary
To convert Kilowatt Hour to Kilojoule, multiply the value in kwh by the ratio of joules per kwh divided by joules per kj. Equivalently: value_kj = value_kwh × (3600000 / 1000). Numerically, 1 kwh equals 3600 kj.
Relationship context
You are converting between electrical energy (watt-hours) (Kilowatt Hours) and SI energy (joules) (Kilojoules). All values are mapped through joules first. The numeric factor is 3.600000e+3.
Conversion tables
| Kilowatt Hour (kwh) | Kilojoule (kj) |
|---|---|
| 0.1 | 360 |
| 1 | 3,600 |
| 2 | 7,200 |
| 3 | 10,800 |
| 4 | 14,400 |
| 5 | 18,000 |
| 6 | 21,600 |
| 7 | 25,200 |
| 8 | 28,800 |
| 9 | 32,400 |
| Kilowatt Hour (kwh) | Kilojoule (kj) |
|---|---|
| 10 | 36,000 |
| 20 | 72,000 |
| 30 | 108,000 |
| 40 | 144,000 |
| 50 | 180,000 |
| 60 | 216,000 |
| 70 | 252,000 |
| 80 | 288,000 |
| 90 | 324,000 |
| 100 | 360,000 |