Kāla-vibhāga: The Divisions of Time from Atom to Brahmā, and the Lord Beyond Time
चत्वारि त्रीणि द्वै चैकं कृतादिषु यथाक्रमम् । संख्यातानि सहस्राणि द्विगुणानि शतानि च ॥ १९ ॥
catvāri trīṇi dve caikaṁ kṛtādiṣu yathā-kramam saṅkhyātāni sahasrāṇi dvi-guṇāni śatāni ca
តាមលំដាប់ ក្រឹតយុគមាន ៤ ពាន់, ត្រេតាមាន ៣ ពាន់, ទ្វាបរមាន ២ ពាន់, កលិមាន ១ ពាន់ ហើយចំនួនរយគឺទ្វេគុណ។ ដូច្នេះ ក្រឹត ៤,៨០០; ត្រេតា ៣,៦០០; ទ្វាបរ ២,៤០០; កលិ ១,២០០ ឆ្នាំទេវតា។
As aforementioned, one year of the demigods is equal to 360 years of the human beings. The duration of the Satya-yuga is therefore 4,800 × 360, or 1,728,000 years. The duration of the Tretā-yuga is 3,600 × 360, or 1,296,000 years. The duration of the Dvāpara-yuga is 2,400 × 360, or 864,000 years. And the last, the Kali-yuga, is 1,200 × 360, or 432,000 years.
This verse states that Satya, Tretā, Dvāpara, and Kali are proportioned 4:3:2:1, counted in thousands, with the related hundreds (the transitional portions) described as doubled as well.
In this section on cosmic time, Śukadeva explains the structured flow of creation and degradation, helping the listener understand how dharma and human conditions change across yugas within the Lord’s cosmic administration.
Knowing that Kali-yuga is characterized by reduced virtue encourages a devotee to prioritize sādhana—hearing and chanting, truthfulness, compassion, and steady devotion—rather than relying on external conditions for spiritual progress.