How long does it take to complete a PhD program in different countries?

PhD program duration is different for each country and university in the world. For example, In India PhD can be completed in 3 to 6 years, while on the other hand, in countries like USA, UK, PhD can be completed in 3 to 4 years. In countries like Canada, PhD can be completed in 3 to 6 years. In Australia and Japan, PhD can be completed in 3 years. In Denmark, PhD course duration is of 1 to 1.5 years. In Germany, PhD course can be completed in 2 to 6 years, depending on the course specialization.