Kilojoule Converter - Convert kJ to Joule, Calorie, BTU, kWh & More
Result:
1 kJ = 1000 J
How This Kilojoule Converter Works
Enter kJ Value
Type your kilojoule amount in the input box
Pick Target Unit
Choose joule, calorie, BTU, or kWh from dropdown
Get Result
See instant conversion with accurate formula
This kilojoule calculator uses precise conversion factors. It converts kJ to any energy unit instantly. Perfect for food energy, exercise calories, and heating calculations.
Kilojoule Conversion Formulas
Kilojoule to Joule:
J = kJ × 1000
Example: 5 kJ = 5 × 1000 = 5,000 J
Use this formula to convert kJ to joule for physics calculations.
Kilojoule to Calorie:
cal = kJ × 239.006
Example: 2 kJ = 2 × 239.006 = 478.01 cal
Convert kJ to calorie for food energy and diet planning.
Kilojoule to BTU:
BTU = kJ × 0.947817
Example: 10 kJ = 10 × 0.947817 = 9.478 BTU
Convert kJ to BTU for heating and cooling systems.
Kilojoule to kWh:
kWh = kJ ÷ 3600
Example: 3600 kJ = 3600 ÷ 3600 = 1 kWh
Convert kJ to kWh for electricity bills and energy costs.
Our kilojoule converter uses these exact formulas. All conversions are scientifically accurate and follow international energy unit standards.
Kilojoule Conversion Table
| Kilojoule (kJ) | Joule (J) | Calorie (cal) | Kilocalorie (kcal) | BTU | Watt Hour (Wh) |
|---|---|---|---|---|---|
| 0.1 | 100 | 23.9 | 0.024 | 0.095 | 0.028 |
| 0.5 | 500 | 119.5 | 0.120 | 0.474 | 0.139 |
| 1 | 1,000 | 239.0 | 0.239 | 0.948 | 0.278 |
| 2 | 2,000 | 478.0 | 0.478 | 1.896 | 0.556 |
| 5 | 5,000 | 1195.0 | 1.195 | 4.739 | 1.389 |
| 10 | 10,000 | 2390.1 | 2.390 | 9.478 | 2.778 |
| 20 | 20,000 | 4780.1 | 4.780 | 18.956 | 5.556 |
| 50 | 50,000 | 11950.3 | 11.950 | 47.391 | 13.889 |
| 100 | 100,000 | 23900.6 | 23.901 | 94.782 | 27.778 |
| 200 | 200,000 | 47801.2 | 47.801 | 189.563 | 55.556 |
| 500 | 500,000 | 119503.0 | 119.503 | 473.909 | 138.889 |
| 1000 | 1,000,000 | 239006.0 | 239.006 | 947.817 | 277.778 |
| 2000 | 2,000,000 | 478012.0 | 478.012 | 1895.634 | 555.556 |
| 5000 | 5,000,000 | 1195030.0 | 1195.030 | 4739.085 | 1388.890 |
| 10000 | 10,000,000 | 2390060.0 | 2390.060 | 9478.170 | 2777.780 |
Energy Units Progression Chart
1 kJ
5 kJ
10 kJ
50 kJ
100 kJ
1000 kJ
Practice Problems
Problem 1:
Convert 25 kJ to calories
Solution: 25 × 239.006 = 5,975.15 cal
Problem 2:
Convert 15 kJ to BTU
Solution: 15 × 0.947817 = 14.217 BTU
Problem 3:
Convert 7200 kJ to kWh
Solution: 7200 ÷ 3600 = 2 kWh
Problem 4:
Convert 50 kJ to joules
Solution: 50 × 1000 = 50,000 J
Problem 5:
Convert 12 kJ to kilocalories
Solution: 12 × 0.239006 = 2.868 kcal
Common Kilojoule Conversion Examples
Food Energy Examples
Exercise Energy Examples
Daily Uses of Kilojoule Converter
Nutrition Planning
Food labels show energy in kilojoules. Convert kJ to calories for diet tracking.
Exercise Tracking
Fitness apps display energy burned in kJ. Convert to calories for better understanding.
Energy Bills
Heating systems measure energy in kJ. Convert kJ to kWh for cost calculations.
Science Studies
Chemistry and physics use kJ for energy calculations. Convert to joules or BTU.
Battery Specs
Battery capacity shown in kJ. Convert to watt-hours for device usage time.
Cooking Recipes
International recipes use kJ for energy content. Convert to familiar units.
Frequently Asked Questions
What is a kilojoule?
A kilojoule (kJ) is a unit of energy equal to 1000 joules. It measures the amount of energy in food, exercise, and heating systems. One kJ equals about 0.24 calories.
How do I convert kJ to calories?
To convert kilojoules to calories, multiply the kJ value by 239.006. For example, 10 kJ = 10 × 239.006 = 2,390 calories. This kilojoule converter does this calculation instantly.
Why use a kilojoule converter?
A kilojoule converter helps you understand energy values in different units. Food labels, exercise equipment, and energy bills use different units. This tool converts between them easily.
Is this kilojoule calculator accurate?
Yes, our kilojoule calculator uses precise conversion factors. It converts kJ to joule, calorie, BTU, and kWh with scientific accuracy. All formulas follow international standards.
Can I convert kJ to kWh?
Yes, you can convert kilojoules to kilowatt-hours. Divide kJ by 3600 to get kWh. For example, 7200 kJ = 7200 ÷ 3600 = 2 kWh. This is useful for energy bill calculations.
About Kilojoule Energy Unit
What is Kilojoule?
Kilojoule (kJ) is a metric unit of energy. It equals 1000 joules. Scientists use kJ to measure energy in food, exercise, and heating.
The kilojoule converter helps you change kJ to other energy units like calories, BTU, or kWh easily.