Convert Joules to BTU

Converting Joules (J) to BTU (BTU) is a common task in energy measurements. Energy conversions connect food nutrition labels (calories), electricity bills (kWh), and scientific measurements in joules or BTU.

To convert, multiply the joules value by 0.000947813. Written as an equation: BTU = J × 0.000947813.

One joules equals approximately 0.000948 BTU. This means you can multiply any J value by 0.000948 to get the equivalent in BTU.

Worked example: 10 J = 0.009478 BTU. Enter your own value in the converter above for instant results.

Common mistake: Food calories on nutrition labels are actually kilocalories (kcal), which confuses many people when comparing to joules or watt-hours.

Bookmark this page for quick J to BTU conversions, or use the swap button to reverse the direction and convert BTU back to J.