Energy Converter

Convert between chemical, electrical and physical energy units.

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Related Conversions
1 kJ to J 250 kJ to J 500 kJ to J 980 kJ to J 1,069 kJ to J 1,426 kJ to J 1,782 kJ to J 2,138 kJ to J 10,000 kJ to J 17,820 kJ to J 25,000 kJ to J 100,000 kJ to J
Reverse Conversions
5 J to kJ 10 J to kJ 100 J to kJ 713 J to kJ 980 J to kJ 1,000 J to kJ 1,069 J to kJ 1,782 J to kJ 5,000 J to kJ 8,910 J to kJ 25,000 J to kJ 100,000 J to kJ
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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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
Match stick 1 kJ
Laptop full charge 200 kJ
Microwave 10 minutes 0.17 kWh

Formula

J = kJ × 1000

Example

Example: convert 891 kilojoules to joules.

891 kJ = 891000 J

Conversion table

kilojoules (kJ) joules (J)
1 kJ 1000 J
2 kJ 2000 J
5 kJ 5000 J
10 kJ 10000 J
20 kJ 20000 J
50 kJ 50000 J
100 kJ 100000 J

Explanation

These are both units.

How to convert kilojoules to joules

  1. Start with the value in kilojoules (kJ).
  2. Multiply it by 1000.
  3. The result is the measurement in joules (J).

Example: 891 kJ → 891000 J

Frequently Asked Questions

How much is 891 kilojoules in joules?

891 kilojoules equals 891000 joules.

How many joules is 1 kilojoule?

1 kilojoule equals 1000 joules.

How many kilojoules is 1 joule?

1 joule equals 0.001 kilojoules.

What is the difference between kilojoules and joules?

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 kilojoules and joules 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 kilojoule equal 1000 joules?

Because the “kilo-” prefix means 1000. One kilojoule equals 1000 joules.