Our foundation wants to know the quantity of half a sa', which is obligatory in Zakat al-Fitr, in grams according to an internationally recognized estimation and to what has been determined by the Islamic Research Assembly in Cairo. [Please] take into account that we follow the Hanafi school of jurisprudence.

It is established in Hanafi jurisprudence that the amount of Zakat al-Fitr is half a sa' of wheat, wheat flour, a mixture of wheat and barley flour, or raisins, or one sa' of dates or barley.
- A sa' is the measure of the region with the capacity of four mudds.
- A mudd is the measure of two open medium-sized handfuls; according to the Hanafis its amount equals two Iraqi ritls.
- According to the Hanafis, an Iraqi ritl is half a mann; a mann is 260 dirhams.
- According to the Hanafis, a dirham is three and one eighths of a gram (3.125).

Based on the above, according to the Hanafis, the mann is equivalent to 3.125×260= eight hundred and twelve and a half of a gram (812.5) which is also equivalent to two Iraqi ritls. Therefore, the measure of four mudds is: 4×812.5= three kilograms and a quarter (3.25).

Based on this and in reference to the question, according to the Hanafis, half a sa' fulfills the obligation of Zakat al-Fitr for whoever wants to give it out as wheat, wheat flour, a mixture of wheat and barley flour, or raisins which is equivalent to 1.625 kgs; One sa', which is equivalent to 3.250 kgs fulfills the obligation of Zakat al-Fitr for whoever wishes to give it out as dates or barley.
Allah knows best.