Convert Calories to Watt-hours

Whether you need to express a value in Wh instead of cal, 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.

To convert, multiply the calories value by 0.00116222. Written as an equation: Wh = cal × 0.00116222.

One calories equals approximately 0.001162 Wh. This means you can multiply any cal value by 0.001162 to get the equivalent in Wh.

Worked example: 10 cal = 0.011622 Wh. 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 cal to Wh conversions, or use the swap button to reverse the direction and convert Wh back to cal.