Energy Converter

Convert between chemical, electrical and physical energy units.

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Related Conversions
25 kcal to kJ 50 kcal to kJ 100 kcal to kJ 500 kcal to kJ 513 kcal to kJ 559 kcal to kJ 932 kcal to kJ 1,864 kcal to kJ 4,660 kcal to kJ 5,000 kcal to kJ 9,320 kcal to kJ 10,000 kcal to kJ
Reverse Conversions
10 kJ to kcal 373 kJ to kcal 500 kJ to kcal 746 kJ to kcal 932 kJ to kcal 1,000 kJ to kcal 1,118 kJ to kcal 4,660 kJ to kcal 5,000 kJ to kcal 10,000 kJ to kcal 25,000 kJ to kcal 100,000 kJ to kcal
More Energy Conversions
100 J to cal 1 GJ to kWh 1 GJ to MJ 1 MJ to BTU 100 kJ to kcal 1 MJ to kWh 2 GJ to MJ 2 MJ to BTU 250 cal to J 1 kWh to cal

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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

1 kWh 3.6 MJ
100 W bulb for 1 hour 0.1 kWh
Match stick 1 kJ
Microwave 10 minutes 0.17 kWh
AA battery 10 kJ
Phone battery 40 kJ

Formula

kJ = kcal × 4.184

Example

Example: convert 466 kilocalories to kilojoules.

466 kcal = 1949.744 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: 466 kcal → 1949.744 kJ

Frequently Asked Questions

How much is 466 kilocalories in kilojoules?

466 kilocalories is about 1949.74 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.