Energy Converter

Convert between chemical, electrical and physical energy units.

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Related Conversions
1 BTU to J 100 BTU to J 250 BTU to J 500 BTU to J 5,000 BTU to J 10,000 BTU to J 25,000 BTU to J 44,000 BTU to J 50,000 BTU to J 80,000 BTU to J 160,000 BTU to J 400,000 BTU to J
Reverse Conversions
10 J to BTU 25 J to BTU 250 J to BTU 500 J to BTU 2,500 J to BTU 10,000 J to BTU 36,000 J to BTU 44,000 J to BTU 64,000 J to BTU 80,000 J to BTU 100,000 J to BTU 800,000 J to BTU
More Energy Conversions
1 GJ to kWh 1 GJ to MJ 1 MJ to BTU 100 J to cal 1 MJ to kWh 2 GJ to MJ 2 MJ to BTU 100 kJ to kcal 1 kWh to cal 10,000 J to kJ

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Common Benchmarks

Food calorie 4184 J
1 kWh 3.6 MJ
Cup of coffee 5 kJ
Match stick 1 kJ
Phone battery 40 kJ
100 W bulb for 1 hour 0.1 kWh

Formula

J = BTU × 1055.056

Example

Example: convert 40000 British thermal units to joules.

40000 BTU = 42202240 J

Conversion table

British thermal units (BTU) joules (J)
1 BTU 1055.056 J
2 BTU 2110.112 J
5 BTU 5275.28 J
10 BTU 10550.56 J
20 BTU 21101.12 J
50 BTU 52752.8 J
100 BTU 105505.6 J

Explanation

These are both units.

How to convert British thermal units to joules

  1. Start with the value in British thermal units (BTU).
  2. Multiply it by 1055.056.
  3. The result is the measurement in joules (J).

Example: 40000 BTU → 42202240 J

Frequently Asked Questions

How much is 40000 British thermal units in joules?

40000 British thermal units equals 42202240 joules.

How many joules is 1 British thermal unit?

1 British thermal unit equals 1055.056 joules.

How many British thermal units is 1 joule?

1 joule equals 0.000947816988 British thermal units.

What is the difference between British thermal units 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 British thermal units 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 British thermal unit equal 1055.056 joules?

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