The required value of Fitrana was described by the Prophet Mohammad (saw) peace be upon him as one saa. One saa is equivalent to four ‘madd’, which is translated as the amount one can have hold when their hands are together.
Every Muslim is obliged, if they have the means to do so, to pay the Fitrana before Eid al-Fitr. Adults should pay for themselves as well as children or others in their care unable to make the payment themselves.
Fitrana is a way to give thanks to God for having enabled us the strength to observe the obligatory fast, and to ensure that all people around the world, poor and all, are able to engage in the celebration and revelry of Eid al-fitr.
The Messenger of Allah (peace be upon him) ordained that Zakat ul Fitr is to purify the fasting person from indecent words or actions, and to provide food for the needy. It is accepted as Zakah for the person who gives it before the Eid prayer; but it is a mere sadaqah for the one who gives it after the prayer.