Energy Converter

Convert between chemical, electrical and physical energy units.

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Related Conversions
1 BTU to kJ 5 BTU to kJ 10 BTU to kJ 50 BTU to kJ 100 BTU to kJ 250 BTU to kJ 960 BTU to kJ 1,280 BTU to kJ 1,920 BTU to kJ 3,200 BTU to kJ 5,000 BTU to kJ 8,000 BTU to kJ
Reverse Conversions
1 kJ to BTU 10 kJ to BTU 25 kJ to BTU 250 kJ to BTU 720 kJ to BTU 880 kJ to BTU 960 kJ to BTU 1,000 kJ to BTU 1,280 kJ to BTU 3,200 kJ to BTU 5,000 kJ to BTU 100,000 kJ to BTU
More Energy Conversions
1 MJ to BTU 100 J to cal 1 GJ to kWh 1 GJ to MJ 2 MJ to BTU 100 kJ to kcal 1 MJ to kWh 2 GJ to MJ 10 BTU to J

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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

Food calorie 4184 J
Phone battery 40 kJ
Gasoline liter 34 MJ
Cup of coffee 5 kJ
Match stick 1 kJ
Boil 1 liter water 334 kJ

Formula

kJ = BTU × 1.055056

Example

Example: convert 800 British thermal units to kilojoules.

800 BTU = 844.0448 kJ

Conversion table

British thermal units (BTU) kilojoules (kJ)
1 BTU 1.055056 kJ
2 BTU 2.110112 kJ
5 BTU 5.27528 kJ
10 BTU 10.55056 kJ
20 BTU 21.10112 kJ
50 BTU 52.7528 kJ
100 BTU 105.5056 kJ

Explanation

These are both units.

How to convert British thermal units to kilojoules

  1. Start with the value in British thermal units (BTU).
  2. Multiply it by 1.055056.
  3. The result is the measurement in kilojoules (kJ).

Example: 800 BTU → 844.0448 kJ

Frequently Asked Questions

How much is 800 British thermal units in kilojoules?

800 British thermal units is about 844.045 kilojoules.

How many kilojoules is 1 British thermal unit?

1 British thermal unit equals 1.055056 kilojoules.

How many British thermal units is 1 kilojoule?

1 kilojoule equals 0.947816987913 British thermal units.

What is the difference between British thermal units 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 British thermal units 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 British thermal unit equal 1.055056 kilojoules?

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