Islamic Inheritance (Mirath) Calculator
Work out how an estate is divided under Sunni Islamic inheritance law. Enter the surviving family members below and get an instant, share-by-share breakdown.
Surviving Heirs
Distribution
The logic behind the numbers
Sunni inheritance law divides heirs into two broad groups, applied in a fixed order.
Ashab al-Furud — Fixed-share heirs
Heirs assigned an exact Qur’anic fraction — such as a spouse’s ¼ or ⅛, or a mother’s ⅙ or ⅓ — regardless of the estate size. These shares are calculated first.
Asaba — Residuary heirs
Sons, and in some cases a father or brothers, inherit whatever remains after the fixed shares are paid — sometimes the entire estate if no fixed-share heirs exist.
Hajb — Exclusion
Closer relatives block more distant ones. A surviving son, for example, excludes siblings entirely, since inheritance flows first through direct descendants.
Awl & Radd — Adjustments
If fixed shares add up to more than the whole estate, every share is scaled down proportionally (Awl). If they add up to less and no residuary heir exists, the leftover is returned proportionally to the fixed-share heirs (Radd).
Does this replace a scholar or a lawyer?
No. This tool is for education and estimation. Real estates often involve details — a missing heir, disputed paternity, a will, jointly-owned property, or heirs this calculator doesn’t cover (grandparents, grandchildren, etc.) — that change the outcome. Always confirm the final distribution with a qualified Islamic scholar, and follow your country’s legal process for probate.
What should be subtracted from the estate before calculating?
Funeral and burial costs, any outstanding debts of the deceased, and any bequest (wasiyyah) — which cannot exceed one third of the estate and cannot be left to an heir who already inherits by Faraid. What remains after that is the amount this calculator divides.
Why did a sibling I entered receive nothing?
Siblings are excluded entirely if the deceased has a surviving son or father — inheritance passes through the closer relative first. Paternal (consanguine) siblings are also excluded if a full brother survives.
Why do sons get double what daughters get?
Where children inherit as residuary heirs together, the Qur’an (4:11) specifies a 2:1 ratio between sons and daughters. This is tied to differing financial responsibilities in the Islamic legal framework — a son carries the sole duty of maintenance for a wife and family, while a woman’s wealth remains hers alone under no obligation to spend it on others.