Islamic Inheritance Calculator
Simplified Mirath (faraid) share estimate for spouse, parents, sons and daughters.
What does the undefined do?
It estimates the main faraid shares, spouse, mother, father and children, from the net estate, so you can see roughly how the estate divides before consulting a scholar.
- Inputs: the net estate, the spouse, the number of sons and daughters, and whether the parents are alive.
- Output: the shares for the spouse and children in money, plus a percentage breakdown.
- Method: fixed Quranic shares for the spouse, mother and father, with the residue split among children at two shares for a son to one for a daughter.
Quick answer
With a wife, one son and both parents alive, a net estate of 100,000 divides roughly as spouse 12,500, mother 16,667, father 16,667 and the son 54,167. A qualified scholar should confirm the final shares.
What This Calculator Really Does
Islamic inheritance, or faraid, is a precise system. Some heirs take fixed shares set out in the Quran, and the rest is distributed as residue to the closest male relatives. This tool models the most common case: a spouse, a mother, a father and children. The spouse takes one quarter or one eighth depending on whether there are children, the mother takes one third or one sixth on the same basis, and the father takes one sixth when there are sons or becomes a residuary heir when there are none. The children then share the residue, with each son receiving twice the share of each daughter. It is deliberately simple: real faraid also covers grandfathers, grandmothers, siblings, awl (proportional reduction) and radd (return of surplus), so use this as an overview and confirm with a scholar.
The formula it uses
Spouse share = 1/4 (husband, no children), 1/8 (wife, children), 1/2 (husband, no children), 1/4 (wife, no children). Mother = 1/3 with no children, 1/6 with children. Father = 1/6 when there are sons, else residuary. Residue = 1 minus the fixed shares, split among children so each son gets two units and each daughter one.
Worked example with real numbers
A net estate of 100,000 with a wife, one son, and both parents alive. The wife takes one eighth, 12,500. The mother takes one sixth, 16,667. The father takes one sixth, 16,667. The residue is 54,166 and the single son takes all of it, giving spouse 12,500 and the son 54,167 with rounding.
Common mistakes to avoid
- Distributing the gross estate before debts and funeral costs, which must be paid first.
- Ignoring a valid will, which can only cover up to one third of the estate.
- Assuming this simplified model matches every family, when grandparents, siblings and awl change the outcome.
Assumptions and limitations
Debts, funeral costs and any wasiyyah up to one third are assumed already deducted from the net estate you enter. Only spouse, parents and children are modelled, with no awl, radd, grandparents or siblings.
Disclaimer
This is an educational estimate, not a legal or religious ruling. Faraid has many cases this model does not cover, so confirm the final distribution with a qualified Islamic scholar or an authorised inheritance office.
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- Zakat Calculator — the other major Islamic financial calculation
- Inheritance and Estate Calculator
- Child Support Split Calculator
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Frequently Asked Questions
How is the undefined calculated?
Fixed Quranic shares are assigned to the spouse, mother and father, then the remaining residue is divided among the children at two shares for a son to one for a daughter. The steps panel lists each stage.
What do I need to use the undefined?
The net estate after debts, the spouse, the number of sons and daughters, and whether each parent is alive.
What does the result from the undefined show?
The spouse and children shares in money, plus a percentage breakdown of every modelled heir.
What is the difference between fixed shares and residue?
Fixed shares are set amounts named in the Quran, such as the spouse one quarter or one eighth. Residue is whatever remains, and it goes to the closest male relatives or is shared among the children.
Does a will override faraid?
Only within limits. A Muslim may bequeath up to one third of the estate to non-heirs, while the rest follows faraid rules.
Is the undefined really free?
Yes — 100 percent free, no sign-up, and everything runs in your browser.