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Convert BTU to Joules — Instantly

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

BTU to joules converter

Energy in BTU
⇄
Joules → J
Enter a value above to see the result
Formula joules = BTU × 1,055.05585262

Quick Reference

BTU to Joules Conversion Table

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

Common BTU to joule conversions from 0.1 BTU to 10,000 BTU
BTU Calculation Joules (J)
0.1 BTU 0.1 × 1,055.05585262 105.505585262 J
0.5 BTU 0.5 × 1,055.05585262 527.52792631 J
1 BTU 1 × 1,055.05585262 1,055.05585262 J
2 BTU 2 × 1,055.05585262 2,110.11170524 J
5 BTU 5 × 1,055.05585262 5,275.2792631 J
10 BTU 10 × 1,055.05585262 10,550.5585262 J
50 BTU 50 × 1,055.05585262 52,752.792631 J
100 BTU 100 × 1,055.05585262 105,505.585262 J
500 BTU 500 × 1,055.05585262 527,527.92631 J
1,000 BTU 1,000 × 1,055.05585262 1,055,055.85262 J
5,000 BTU 5,000 × 1,055.05585262 5,275,279.2631 J
10,000 BTU 10,000 × 1,055.05585262 10,550,558.5262 J

Step-by-Step

How to Convert BTU to Joules

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

The Formula

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

joules = BTU × 1,055.05585262

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

How to Turn BTU into Joules — Step by Step

1

Write down the BTU value

Identify the number of BTU you want to convert — for example, 10 BTU.

2

Multiply by 1,055.05585262

10 BTU × 1,055.05585262 = 10,550.5585262 joules. This gives you the equivalent energy in joules.

3

Label your answer

Always write the unit (J or joules) after the number so the result is clear and unambiguous.

BTU vs Joules

What Is the Difference Between BTU and Joules?

BTU and joules 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 BTU to joules, multiply the number of BTU by 1,055.05585262.

For example, 0.5 BTU = 527.52792631 J, 1 BTU = 1,055.05585262 J, and 10 BTU = 10,550.5585262 J.

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

Worked Examples

Sample BTU to Joule Calculations

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

0.5 BTU to joules

0.5 × 1,055.05585262 = 527.52792631 joules.

1 BTU to joules

1 × 1,055.05585262 = 1,055.05585262 joules.

2 BTU to joules

2 × 1,055.05585262 = 2,110.11170524 joules.

5 BTU to joules

5 × 1,055.05585262 = 5,275.2792631 joules.

10 BTU to joules

10 × 1,055.05585262 = 10,550.5585262 joules.

50 BTU to joules

50 × 1,055.05585262 = 52,752.792631 joules.

100 BTU to joules

100 × 1,055.05585262 = 105,505.585262 joules.

1,000 BTU to joules

1,000 × 1,055.05585262 = 1,055,055.85262 joules.

FAQ

Frequently Asked Questions

Everything you need to know about converting BTU to joules.