Śrīmad-Bhāgavatam 3.11.19
SB 3.11.19
Open the full passageSanskrit
catvāri trīṇi dve caikaṁ kṛtādiṣu yathā-kramam saṅkhyātāni sahasrāṇi dvi-guṇāni śatāni ca
Translation
The duration of the Satya millennium equals 4,800 years of the years of the demigods; the duration of the Treta millennium equals 3600 years of the demigods; the duration of the Dvāpara millennium equals 2,400 years; and that of the Kali millennium is 1,200 years of the demigods.