Bhāgavatam Mahimā — The Glory, Measure, Transmission, and Gift of Śrīmad-Bhāgavatam
ब्राह्मं दशसहस्राणि पाद्मं पञ्चोनषष्टि च । श्रीवैष्णवं त्रयोविंशच्चतुर्विंशति शैवकम् ॥ ४ ॥ दशाष्टौ श्रीभागवतं नारदं पञ्चविंशति । मार्कण्डं नव वाह्नं च दशपञ्च चतु:शतम् ॥ ५ ॥ चतुर्दश भविष्यं स्यात्तथा पञ्चशतानि च । दशाष्टौ ब्रह्मवैवर्तं लैङ्गमेकादशैव तु ॥ ६ ॥ चतुर्विंशति वाराहमेकाशीतिसहस्रकम् । स्कान्दं शतं तथा चैकं वामनं दश कीर्तितम् ॥ ७ ॥ कौर्मं सप्तदशाख्यातं मात्स्यं तत्तु चतुर्दश । एकोनविंशत्सौपर्णं ब्रह्माण्डं द्वादशैव तु ॥ ८ ॥ एवं पुराणसन्दोहश्चतुर्लक्ष उदाहृत: । तत्राष्टदशसाहस्रं श्रीभागवतमिष्यते ॥ ९ ॥
brāhmaṁ daśa sahasrāṇi pādmaṁ pañcona-ṣaṣṭi ca śrī-vaiṣṇavaṁ trayo-viṁśac catur-viṁśati śaivakam
The Brahma Purāṇa consists of ten thousand verses; the Padma Purāṇa of fifty-five thousand; the Śrī Viṣṇu Purāṇa of twenty-three thousand; the Śiva Purāṇa of twenty-four thousand; and the Śrīmad-Bhāgavatam of eighteen thousand. The Nārada Purāṇa has twenty-five thousand verses; the Mārkaṇḍeya Purāṇa nine thousand; the Agni Purāṇa fifteen thousand four hundred; the Bhaviṣya Purāṇa fourteen thousand five hundred; the Brahma-vaivarta Purāṇa eighteen thousand; and the Liṅga Purāṇa eleven thousand. The Varāha Purāṇa contains twenty-four thousand; the Skanda Purāṇa eighty-one thousand one hundred; the Vāmana Purāṇa ten thousand; the Kūrma Purāṇa seventeen thousand; the Matsya Purāṇa fourteen thousand; the Garuḍa Purāṇa nineteen thousand; and the Brahmāṇḍa Purāṇa twelve thousand. Thus the total of all Purāṇas is declared to be four hundred thousand verses; and of these, eighteen thousand belong, once again, to the beautiful Bhāgavatam.
Śrīla Jīva Gosvāmī has quoted from the Matsya Purāṇa as follows:
This verse states that Śrīmad Bhāgavatam is accepted as having eighteen thousand verses.
It declares that the combined Purāṇas are traditionally said to total four hundred thousand verses.
It helps a seeker prioritize study—recognizing Śrīmad Bhāgavatam as a distinct, complete Purāṇa within the larger Purāṇic tradition and approaching it with focused reverence and consistency.