| Singular | Dual | Plural |
| Nominative |
कठोपनिषत्
kaṭhopaniṣat
|
कठोपनिषदौ
kaṭhopaniṣadau
|
कठोपनिषदः
kaṭhopaniṣadaḥ
|
| Vocative |
कठोपनिषत्
kaṭhopaniṣat
|
कठोपनिषदौ
kaṭhopaniṣadau
|
कठोपनिषदः
kaṭhopaniṣadaḥ
|
| Accusative |
कठोपनिषदम्
kaṭhopaniṣadam
|
कठोपनिषदौ
kaṭhopaniṣadau
|
कठोपनिषदः
kaṭhopaniṣadaḥ
|
| Instrumental |
कठोपनिषदा
kaṭhopaniṣadā
|
कठोपनिषद्भ्याम्
kaṭhopaniṣadbhyām
|
कठोपनिषद्भिः
kaṭhopaniṣadbhiḥ
|
| Dative |
कठोपनिषदे
kaṭhopaniṣade
|
कठोपनिषद्भ्याम्
kaṭhopaniṣadbhyām
|
कठोपनिषद्भ्यः
kaṭhopaniṣadbhyaḥ
|
| Ablative |
कठोपनिषदः
kaṭhopaniṣadaḥ
|
कठोपनिषद्भ्याम्
kaṭhopaniṣadbhyām
|
कठोपनिषद्भ्यः
kaṭhopaniṣadbhyaḥ
|
| Genitive |
कठोपनिषदः
kaṭhopaniṣadaḥ
|
कठोपनिषदोः
kaṭhopaniṣadoḥ
|
कठोपनिषदाम्
kaṭhopaniṣadām
|
| Locative |
कठोपनिषदि
kaṭhopaniṣadi
|
कठोपनिषदोः
kaṭhopaniṣadoḥ
|
कठोपनिषत्सु
kaṭhopaniṣatsu
|