Islam sets out fixed shares of a person's estate — the farāʾiḍ, laid down in the Qur'an (Sūrah an-Nisāʾ). This calculator applies them across the usual heirs, working out who inherits, who is excluded by a closer heir, and each share.
Inheritance is a precise and weighty area of Islamic law. This calculator handles the standard heirs shown below and applies blocking (ḥajb), ʿawl and radd automatically. It follows the Ḥanafī position that the paternal grandfather blocks brothers and sisters, and does not apply the mushtaraka case — points on which schools differ. It also does not cover great-grandchildren, uncles, cousins, or distant kin (dhawū al-arḥām). For any real estate, please have the result checked by a qualified scholar or farāʾiḍ specialist. Treat it as a guide, not a ruling.
1 · The spouse
2 · Children & grandchildren
“Grandchildren” here means the children of a son. A son's line inherits only when there is no living son.
3 · Parents & grandparents
4 · Brothers & sisters
Full = same mother and father · Paternal = same father only · Maternal = same mother only. Each is treated differently in the law.
Estate value (optional)
The net estate after funeral costs, debts, and any bequest (up to one third) have been paid. Enter it to see each share as an amount.
The shares
Notes on the method
- First, three things come out of the estate — funeral expenses, then debts, then any bequest (waṣiyyah) of up to a third to non-heirs. What remains is what this tool divides.
- Fixed shares, then the residue. Qur'anic heirs (spouse, parents, daughters, grandmothers, certain sisters, maternal siblings) take their set fractions first; the residuary heirs (ʿaṣaba) — sons, a son's sons, the father or grandfather, then brothers — take what is left, a male taking the share of two females.
- Blocking (ḥajb). A closer heir can exclude a more distant one — a son blocks the grandchildren and all siblings; the father blocks the grandfather, grandmothers and siblings; the mother blocks the grandmothers, and so on. The calculator applies this for you, and lists anyone excluded.
- ʿAwl and radd. If the fixed shares add up to more than the whole, each is reduced in proportion (ʿawl). If they add up to less and there is no residuary heir, the surplus returns to the fixed-share heirs — except the spouse (radd).
Where schools differ this tool takes a position for consistency: the paternal grandfather is treated like the father and blocks brothers and sisters (Ḥanafī view), and the mushtaraka case is not applied. Great-grandchildren, uncles, cousins and distant kin are not covered. Always have a real estate checked by a specialist.
“Allah instructs you concerning your children…” (Qur'an 4:11). The laws of inheritance are among the few the Qur'an details precisely — a mercy and a trust. When in doubt, ask someone who knows.