Convert BTU to Kilojoules

Whether you need to express a value in kJ instead of BTU, this guide walks you through the exact steps. Energy conversions connect food nutrition labels (calories), electricity bills (kWh), and scientific measurements in joules or BTU.

Formula: Multiply the btu value by 1.05506. In equation form: kJ = BTU × 1.05506.

One btu equals approximately 1.05506 kJ. This means you can multiply any BTU value by 1.05506 to get the equivalent in kJ.

For instance, converting 5 BTU gives 5.2753 kJ. Try different values using the quick-value chips or type directly into the input field.

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 BTU to kJ conversions, or use the swap button to reverse the direction and convert kJ back to BTU.