To become a dentist in Qatar, you will need to complete a dental education program and obtain the necessary licensure. The time it takes to become a dentist in Qatar depends on the type of dental program you choose and your individual circumstances. Here are the general steps to becoming a dentist in Qatar and the time it takes to complete each step:

1. Obtain a high school diploma or equivalent: To qualify for a dental program, you will need to have a high school diploma or equivalent. This typically takes 12 years to complete.

2. Complete a dental education program: You can choose to complete a diploma, bachelor's, or master's degree dental program. The time it takes to complete each program varies, with diploma programs taking 2-3 years, bachelor's degree programs taking 4 years, and master's degree programs taking 2-3 years.

3. Obtain a dental license: To practice dentistry in Qatar, you will need to obtain a dental license from the Ministry of Public Health. The process of obtaining a license may take several weeks to a few months.

Overall, the time it takes to become a dentist in Qatar ranges from 2-7 years, depending on the type of dental program you choose and the time it takes to obtain a dental license. It's important to note that the process may also vary depending on individual circumstances, such as prior education or experience in the dental field.