Yes, this calculator follows Quranic inheritance rules and traditional Islamic jurisprudence. However, complex cases may require consultation with a qualified Islamic scholar.

Fixed shares are specified in the Quran (1/2, 1/3, 1/4, 1/6, 1/8). Remainder goes to male agnates (Asaba) when fixed shares don't exhaust the estate.

A son receives double the share of a daughter. For example: if there are 2 sons and 1 daughter, the estate is divided into 5 parts (2+2+1), each son gets 2/5, daughter gets 1/5.

In case of 'Awl' (increase), all shares are proportionally reduced so they total exactly 1.

If no male agnates exist, the leftover returns (Radd) to fixed-share heirs proportionally, except spouse.

Generally, grandchildren do not inherit if their parents (the deceased's children) are alive. They inherit only if their parent predeceased the grandparent.