Energy / kWh → J
Convert Kilowatt-hours to Joules
Convert work, heat, and stored energy using joules as the base. Convert Kilowatt-hours (kWh) to Joules (J). Find the formula, worked examples, unit definitions, and practical guidance below.
Reverse: Joules to Kilowatt-hours →
How to convert kilowatt-hours to joules
Calories use the thermochemical definition. Btu use the International Table definition. Food Calories are kilocalories, not single calories.
Use x for the value in kWh, b for the intermediate value in J, and y for the result in J.
J = kWh × 3600000
Worked examples
10 kWh ≈ 36000000 J
Step 1: (10 × 3600000) ≈ 36000000 J.
Step 2: 36000000 ÷ 1 ≈ 36000000 J.20 kWh ≈ 72000000 J
Step 1: (20 × 3600000) ≈ 72000000 J.
Step 2: 72000000 ÷ 1 ≈ 72000000 J.
Results are rounded to 12 significant digits. Converting units does not increase the precision of the original measurement. Very large or small values outside JavaScript’s finite numeric range are rejected.
About Kilowatt-hours
Kilowatt-hours (kWh) measures energy under the conventions above. The base value in J is (x × 3600000), where x is the numerical value in kWh. Factors shown here are rounded for display; calculations use the stored factor.
About Joules
Joules (J) measures energy under the conventions above. The base value in J is (x × 1), where x is the numerical value in J. Factors shown here are rounded for display; calculations use the stored factor.
Definitions and sources
Carry the same physical assumptions into subsequent physics calculations.
Kilowatt-hours to joules reference table
| Kilowatt-hours (kWh) | Joules (J) |
|---|---|
| 1 | 3600000 |
| 5 | 18000000 |
| 10 | 36000000 |
| 25 | 90000000 |
| 50 | 180000000 |
| 100 | 360000000 |
| 1000 | 3600000000 |
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