Sadaqatul-Fitr is 1.75 Kilograms of wheat or its value in money. This amount is prescribed for paying Sadaqatul-Fitr for one person only. If a person has some minor children, the same amount must be paid on behalf of each one of them separately.
It is Sunnah that
the Sadaqatul-Fitr is paid before performing the Eid prayer. It can also be paid before the day of Eid, but it is not advisable to delay it up to the performance of Eid prayer. However, if a person has failed to pay prior to the times mentioned, they should pay it as soon as possible. Sadaqatul-Fitr is spent on those eligible for Zakat donations.