There are dozens of symbols and abstract designs meaning calm. Getting a tattoo meaning calm likely means that you have a great deal of disruption in your life. For some, it can be a chronic mental illness that causes their minds to live in unrest, requiring displayed reminders to calm yourself. A simple yin and yang symbol is the most common symbol for calm. What is great about the yin and yang is that you can hide other images within it, meaning each circle could be reminders for what you need to be calm about.