How many places still use the monarch system?

As of now, there are around 44 countries that recognize a monarch as the head of state, predominantly within the Commonwealth realms, such as the United Kingdom, Canada, Australia, and New Zealand. Additionally, there are several other nations with monarchies, including Saudi Arabia and Japan, which operate under different systems of governance. The monarch's role and powers vary significantly between constitutional monarchies, where they have limited power, and absolute monarchies, where they hold significant authority.