Declension table of ?purāṇakalpa

Masculine	Singular	Dual	Plural
Nominative	purāṇakalpaḥ	purāṇakalpau	purāṇakalpāḥ
Vocative	purāṇakalpa	purāṇakalpau	purāṇakalpāḥ
Accusative	purāṇakalpam	purāṇakalpau	purāṇakalpān
Instrumental	purāṇakalpena	purāṇakalpābhyām	purāṇakalpaiḥ purāṇakalpebhiḥ
Dative	purāṇakalpāya	purāṇakalpābhyām	purāṇakalpebhyaḥ
Ablative	purāṇakalpāt	purāṇakalpābhyām	purāṇakalpebhyaḥ
Genitive	purāṇakalpasya	purāṇakalpayoḥ	purāṇakalpānām
Locative	purāṇakalpe	purāṇakalpayoḥ	purāṇakalpeṣu

Compound purāṇakalpa -

Adverb -purāṇakalpam -purāṇakalpāt