Prayer: How Do I Calculate the Number of My Missed Daily, Āyāt, and Shortened Prayers?

Practical Laws of Islam as per the teachings of Imam Khamenei

Prayer: How Do I Calculate the Number of My Missed Daily, Āyāt, and Shortened Prayers?

English:

Question #536:

Most often I offered my prayers and performed the qaḍā’ of those which I missed either because I was asleep during their times or my body and clothes were najis and I failed to clean them due to laziness. Now, how could I calculate the number of the missed daily, āyāt, and shortened prayers due on me?

Answer #536:

It suffices to perform qaḍā’ of these prayers as much as you are certain you missed. Among them, perform some shortened and āyāt prayers as much as you are certain that they were shortened or āyāt prayers and offer the remaining as [normal] daily prayers. There is nothing else obligatory for you.

-Imam Khamenei, Practical Laws of Islam, Importance and Conditions of Prayer