Satya Yuga is the first of four yugas in Hinduism. The
duration or number of years in Satya Yuga is calculated differently – one has
to convert the years of devas into the years of the human beings.
The Duration of Satya Yuga is 1,728,000 human years.
Satya Yuga is the golden age.
Its duration is 4, 800 years of the Gods.
An year of the gods is equal to 360 years of human beings.
Thus the duration of Satya Yuga is 1.728 million years.