Each Yugam is preceded by a period called a Sandhya, which is as many hundred years in length as there are thousands of years in that particular Yugam. Each Yugam is also followed by a period of time known as a Sandhyansa, which is also as many hundreds of years in length as there are thousands of years in the Yugam. In between these periods of time is the actual Yugam. Therefore, we have:

Krita-Yugam = 4000 divine years, Sandhya = 400 divine years, Sandhyansa = 400 divine years. Total = 4800 divine years x 360 days = 1,728,000 human years.

Treta-Yugam = 3000 divine years, Sandhya = 300 divine years, Sandhyansa = 300 divine years. Total = 3600 divine years x 360 days = 1,296,000 human years.

Dvapara-Yugam = 2000 divine years, Sandhya = 200 divine years, Sandhyansa = 200 divine years. Total = 2400 divine years x 360 days = 864,000 human years.

Kali-Yugam = 1000 divine years, Sandhya = 100 divine years, Sandhyansa = 100 divine years. Total = 1200 divine years x 360 days = 432,000 human years.

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Uma