Energy Converter

Convert between chemical, electrical and physical energy units.

Energy
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Related Conversions
10 kcal to kJ 25 kcal to kJ 100 kcal to kJ 2,500 kcal to kJ 2,592 kcal to kJ 3,456 kcal to kJ 4,608 kcal to kJ 5,000 kcal to kJ 5,760 kcal to kJ 6,912 kcal to kJ 28,800 kcal to kJ 100,000 kcal to kJ
Reverse Conversions
1 kJ to kcal 5 kJ to kcal 25 kJ to kcal 100 kJ to kcal 250 kJ to kcal 2,592 kJ to kcal 3,456 kJ to kcal 4,608 kJ to kcal 6,912 kJ to kcal 10,000 kJ to kcal 11,520 kJ to kcal 25,000 kJ to kcal
More Energy Conversions
1 MJ to BTU 100 J to cal 1 GJ to kWh 1 GJ to MJ 2 MJ to BTU 250 cal to J 1 MJ to kWh 2 GJ to MJ 10 BTU to J 250 kcal to kJ

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Popular Conversions

Kilowatt-Hours to Megajoules Megajoules to Kilowatt-Hours Joules to Calories Kilocalories to Kilojoules British Thermal Units to Joules Watt-Hours to Joules

Common Benchmarks

100 W bulb for 1 hour 0.1 kWh
AA battery 10 kJ
Match stick 1 kJ
Cup of coffee 5 kJ
Laptop full charge 200 kJ
Slice of bread 330 kJ

Formula

kJ = kcal × 4.184

Example

Example: convert 2880 kilocalories to kilojoules.

2880 kcal = 12049.92 kJ

Conversion table

kilocalories (kcal) kilojoules (kJ)
1 kcal 4.184 kJ
2 kcal 8.368 kJ
5 kcal 20.92 kJ
10 kcal 41.84 kJ
20 kcal 83.68 kJ
50 kcal 209.2 kJ
100 kcal 418.4 kJ

Explanation

These are both units.

How to convert kilocalories to kilojoules

  1. Start with the value in kilocalories (kcal).
  2. Multiply it by 4.184.
  3. The result is the measurement in kilojoules (kJ).

Example: 2880 kcal → 12049.92 kJ

Frequently Asked Questions

How much is 2880 kilocalories in kilojoules?

2880 kilocalories equals 12049.92 kilojoules.

How many kilojoules is 1 kilocalorie?

1 kilocalorie equals 4.184 kilojoules.

How many kilocalories is 1 kilojoule?

1 kilojoule equals 0.239005736138 kilocalories.

What is the difference between kilocalories and kilojoules?

Both measure energy in SI. The main difference is usually scale: some units are convenient for smaller values, while others are used to express larger values more practically.

Where are kilocalories and kilojoules used?

They are used in physics and engineering to measure work, energy, and heat; the most practical unit depends on the magnitude.

Why does 1 kilocalorie equal 4.184 kilojoules?

Because the units are defined with a fixed relationship. To convert kilocalories to kilojoules, multiply by that factor.