Millibars (mbar) and kilopascals (kPa) are both ways to measure pressure. You’ll often see them used in fields like meteorology (weather forecasting) and engineering.
The relationship between them is pretty straightforward: 1 mbar equals 0.1 kPa.
This article will walk you through the conversion process, explain the concept of pressure a little more deeply, and touch on some of the ways these units are used in real-world applications.