Energy Converter

Convert between chemical, electrical and physical energy units.

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Related Conversions
5 kcal to kJ 10 kcal to kJ 25 kcal to kJ 50 kcal to kJ 500 kcal to kJ 2,500 kcal to kJ 22,000 kcal to kJ 24,750 kcal to kJ 33,000 kcal to kJ 44,000 kcal to kJ 66,000 kcal to kJ 550,000 kcal to kJ
Reverse Conversions
5 kJ to kcal 25 kJ to kcal 500 kJ to kcal 5,000 kJ to kcal 10,000 kJ to kcal 22,000 kJ to kcal 24,750 kJ to kcal 33,000 kJ to kcal 44,000 kJ to kcal 50,000 kJ to kcal 55,000 kJ to kcal 275,000 kJ to kcal
More Energy Conversions
1 GJ to MJ 1 MJ to BTU 100 J to cal 1 GJ to kWh 2 GJ to MJ 2 MJ to BTU 100 kJ to kcal 1 MJ to kWh 10,000 J 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

Phone battery 40 kJ
Gasoline liter 34 MJ
100 W bulb for 1 hour 0.1 kWh
Slice of bread 330 kJ
Microwave 10 minutes 0.17 kWh
1 kWh 3.6 MJ

Formula

kJ = kcal × 4.184

Example

Example: convert 27500 kilocalories to kilojoules.

27500 kcal = 115060 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: 27500 kcal → 115060 kJ

Frequently Asked Questions

How much is 27500 kilocalories in kilojoules?

27500 kilocalories equals 115060 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.