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Energy Converter

Convert Kilojoule to Joule.

Input the value of kilojoules below to convert instantly to joules with standard conversions, definitions, and equations.

Energy Converter
kJ
J
Value in Joules = Value in Kilojoules × 1000 Multiply the value in kilojoules by the conversion factor 1000.

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How to Convert Kilojoules to Joules

To convert kilojoule to joule, we use the official conversion formulas. Below is the mathematical formula, plain-English explanation, and a worked example.

kilojoule-to-joule-formula.py
# Mathematical Formula
Value in Joules = Value in Kilojoules × 1000
# Worked Example (5 kJ)
5 kJ × 1000 = 5000.0000 J
What is a Kilojoule?

Kilojoule (kJ)

One thousand Joules.

What is a Joule?

Joule (J)

The base SI unit of energy, equal to work done by a force of one newton moving one meter.

Kilojoule to Joule Conversion Table

Kilojoule (kJ) Joule (J)
1 kJ 1000 J
2 kJ 2000 J
3 kJ 3000 J
5 kJ 5000 J
10 kJ 10000 J
15 kJ 15000 J
20 kJ 20000 J
25 kJ 25000 J
50 kJ 50000 J
100 kJ 100000 J
250 kJ 250000 J
500 kJ 500000 J
1000 kJ 1000000 J

Joule to Kilojoule Conversion Table

Joule (J) Kilojoule (kJ)
1 J 0.001 kJ
2 J 0.002 kJ
3 J 0.003 kJ
5 J 0.005 kJ
10 J 0.01 kJ
15 J 0.015 kJ
20 J 0.02 kJ
25 J 0.025 kJ
50 J 0.05 kJ
100 J 0.1 kJ
250 J 0.25 kJ
500 J 0.5 kJ
1000 J 1 kJ
Questions

Frequently Asked Questions

How do I convert kilojoules to joules?

Multiply the value in kilojoules by the conversion factor 1000. For example, to convert 5 kilojoules to joules: 5 × 1000 = 5000.0000 J.

What is the conversion factor from kilojoule to joule?

The conversion factor is 1000. One kilojoule is equal to 1000 joules.

What is the reverse conversion from joule to kilojoule?

To convert joules back to kilojoules, multiply by 0.001 (or divide the value by 1000). One joule is equal to 0.001 kilojoules.

How many Joules are in 1 Kilowatt-hour (kWh)?

There are exactly 3,600,000 Joules (or 3.6 Megajoules) in 1 kWh.

What is the difference between a calorie and a Calorie?

A lowercase calorie (cal) is a small metric unit (4.184 J). A capitalized Calorie (Cal) is a food calorie, which is actually a kilocalorie (1,000 small calories or 4,184 J).

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