Islamic Inheritance Calculator
Estimate inheritance shares for common family configurations under mainstream Sunni Fara'id.
This tool covers the surviving spouse, mother, father, sons, and daughters only — the family combinations where all four madhabs agree on the exact shares. Any other configuration is refused rather than guessed at. For the full picture on how and why Islamic inheritance law works the way it does, see our complete guide to Islamic inheritance law.
Calculate Estimated Shares
Enter the surviving family members below. Read the scope notice carefully before relying on any result.
Islamic Inheritance (Fara'id) Calculator
Estimate inheritance shares for the most common, universally-agreed family configurations under mainstream Sunni Fara'id.
The Principles Behind These Shares
Why the shares are calculated this way.
Islamic inheritance shares (Fara'id) are fixed by the Quran for certain heirs — including spouses, parents, and daughters — while other heirs, called asaba (residuary heirs, typically the closest surviving male relatives such as sons or fathers), receive whatever remains after the fixed shares are distributed. This structure is not arbitrary: it is built around financial responsibility. A husband, for instance, carries a legal duty to maintain his wife and children regardless of his own wealth, and a son who inherits alongside a sister is legally obligated to help provide for her.
FIXED SHARES (QURANIC HEIRS)
Spouses, mothers, and daughters (when no sons are present) receive a specific fraction of the estate set out directly in the Quran — 1/2, 1/4, 1/8, 1/3, or 1/6 depending on the configuration.
RESIDUARY HEIRS (ASABA)
Sons, and fathers when no son is present, absorb whatever remains after the fixed shares are paid out. This is what guarantees that every fraction of the estate is accounted for in a supported configuration.
Where this calculator declines to give an answer, it is because the entered heirs alone cannot fully account for 100% of the estate under these two mechanisms — meaning other relatives (or a specific scholarly ruling on a disputed case) would determine the remainder.
See the Underlying Logic
An interactive walkthrough of why shares differ the way they do.
Before or after using the calculator above, this scenario-based tool helps illustrate the reasoning behind specific share ratios — such as why a brother's larger share comes with a maintenance duty his sister does not carry.
The Inheritance Logic Tester
Islamic inheritance shares are determined by financial obligation, not gender. Answer three questions to see the logic in action.
Is this heir legally responsible for the financial maintenance of other family members? (e.g., a brother who must maintain his sister, or a husband who must provide for his wife)
Is this heir's share intended primarily for personal savings, or is it expected to fund the communal support of the household?
Which inheritance scenario are you examining?
Frequently Asked Questions
Common questions about this calculator.
Is this calculator a religious ruling (fatwa)?
No. This tool is an educational estimate based on the most common, universally-agreed Fara'id shares. It is not a substitute for a fatwa or for the guidance of a qualified Islamic inheritance scholar, who will consider your complete family situation before finalizing any distribution.
Why does the calculator refuse to give an answer for some family combinations?
Islamic inheritance law includes a small number of cases where classical scholars have historically applied more than one accepted method (such as the 'Umariyyatain' case of a spouse plus both parents with no children), or where the outcome depends on relatives this tool does not collect information about, such as siblings or grandparents. Rather than guess, the calculator tells you when this happens and directs you to a scholar.
Does this tool account for siblings, grandparents, or multiple wives?
It accounts for up to four surviving wives (their share is split equally between them), but it does not account for siblings, grandparents, or any other relatives beyond spouse, mother, father, sons, and daughters. If any of these other relatives survived the deceased, the actual shares will differ from what this tool shows.
Why does a son typically receive more than a daughter?
In configurations where sons are present, they inherit as 'residuary heirs' alongside daughters in a 2:1 ratio. This reflects the son's classical legal obligation to financially maintain dependents (including unmarried sisters and his own family) — an obligation the daughter's share does not carry. For more on this context, see our full guide on Islamic inheritance law.
Can a Muslim leave a will in addition to these fixed shares?
Yes. Islamic law permits a Wasiyyah (will) of up to one-third of the estate, which can be directed to non-heirs, charities, or causes of the deceased's choosing. The remaining two-thirds (or the whole estate, if no will is made) is distributed according to the fixed Fara'id shares.
Educational Notice — Please Read
This calculator is strictly educational. It covers only a limited, uncontested set of family configurations and does not consider siblings, grandparents, or other relatives. Islamic inheritance distribution has real financial and religious consequences — always confirm any actual estate distribution with a qualified Islamic inheritance (Fara'id) scholar or specialist before acting on it.
Explore more in our guides: