Scuba diving is a global sport, welcoming participants from all over the world. When comparing scuba diving in different countries, we need to take into consideration that some aspects change along the way, and one of the main things that changes from country to country is units of measurement. For example, when traveling, we have to convert miles to kilometers, pounds to kilograms, and Celsius to Fahrenheit. The numbers change but the physical measurements are the same. Bar or PSI is one additional measurement change scuba divers sometimes encounter. Below, we’ll explore how these units of measurement compare.