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Convert Joules to BTU — Instantly

Convert joules to BTU instantly using the formula BTU = joules ÷ 1,055.05585262. Includes a calculator, conversion table, worked examples, and FAQs.

Joules to BTU converter

Energy in joules
⇄
Energy in BTU
Enter a value above to see the result
Formula BTU = joules ÷ 1,055.05585262

Quick Reference

Joules to BTU Conversion Table

Common joule to BTU conversions at a glance, using the International Table relationship 1 BTU = 1,055.05585262 J.

Common joules to BTU conversions from 0.1 J to 100,000 J
Joules (J) Calculation BTU
0.1 J 0.1 ÷ 1,055.05585262 0.000094781712031 BTU
0.5 J 0.5 ÷ 1,055.05585262 0.000473908560157 BTU
1 J 1 ÷ 1,055.05585262 0.000947817120313 BTU
10 J 10 ÷ 1,055.05585262 0.009478171203133 BTU
100 J 100 ÷ 1,055.05585262 0.094781712031332 BTU
500 J 500 ÷ 1,055.05585262 0.473908560156659 BTU
1,000 J 1,000 ÷ 1,055.05585262 0.947817120313317 BTU
1,055.05585262 J 1,055.05585262 ÷ 1,055.05585262 1 BTU
2,000 J 2,000 ÷ 1,055.05585262 1.895634240626634 BTU
5,000 J 5,000 ÷ 1,055.05585262 4.739085601566586 BTU
10,000 J 10,000 ÷ 1,055.05585262 9.478171203133172 BTU
100,000 J 100,000 ÷ 1,055.05585262 94.781712031331720 BTU

Step-by-Step

How to Convert Joules to BTU

Converting joules to BTU is simple when you use the correct conversion factor.

The Formula

Joules and BTU are both units of energy used in heating, thermodynamics, engineering, HVAC systems, fuel analysis, and appliance specifications. This page uses the International Table value 1 BTU = 1,055.05585262 joules.

BTU = joules ÷ 1,055.05585262

To convert BTU back to joules, multiply BTU by 1,055.05585262.

How to Turn Joules into BTU — Step by Step

1

Write down the joule value

Identify the number of joules you want to convert — for example, 1,000 J.

2

Divide by 1,055.05585262

1,000 J ÷ 1,055.05585262 = 0.947817120313 BTU. This gives you the equivalent energy in BTU.

3

Label your answer

Always write the unit (BTU) after the number so the result is clear and unambiguous.

Joules vs BTU

What Is the Difference Between Joules and BTU?

Joules and BTU are both units of energy. The joule is the standard SI unit of energy, while the British thermal unit is commonly used in heating, cooling, HVAC ratings, fuel analysis, and appliance specifications.

The relationship used on this page is: 1 BTU = 1,055.05585262 joules. To convert joules to BTU, divide the number of joules by 1,055.05585262.

For example, 1 J = 0.000947817120313 BTU, 1,000 J = 0.947817120313 BTU, and 1,055.05585262 J = 1 BTU.

This conversion is useful in thermodynamics, home energy analysis, engineering calculations, heater and air-conditioner specifications, fuel comparisons, and general energy comparisons.

Worked Examples

Sample Joules to BTU Calculations

Here is how to calculate joules to BTU for commonly searched values.

1 joule to BTU

1 ÷ 1,055.05585262 = 0.000947817120313 BTU.

10 joules to BTU

10 ÷ 1,055.05585262 = 0.009478171203133 BTU.

100 joules to BTU

100 ÷ 1,055.05585262 = 0.094781712031332 BTU.

500 joules to BTU

500 ÷ 1,055.05585262 = 0.473908560156659 BTU.

1,000 joules to BTU

1,000 ÷ 1,055.05585262 = 0.947817120313317 BTU.

1,055.05585262 joules to BTU

1,055.05585262 ÷ 1,055.05585262 = 1 BTU.

2,000 joules to BTU

2,000 ÷ 1,055.05585262 = 1.895634240626634 BTU.

10,000 joules to BTU

10,000 ÷ 1,055.05585262 = 9.478171203133172 BTU.

FAQ

Frequently Asked Questions

Everything you need to know about converting joules to BTU.