This is the single most asked question about Islamic inheritance, and it is usually asked about a rule that is stated more broadly than it exists. There is no general principle that a woman inherits half of a man. There is a specific rule, in a specific configuration, and outside it the scheme does something else entirely.
Where the rule actually applies
The verse is 4:11, and its subject is children inheriting together: where a deceased person leaves both sons and daughters, they take the residue in a two-to-one ratio. The same ratio governs full and consanguine siblings inheriting together in the absence of descendants.
That is close to the whole of it. Run the other configurations and the picture is not what the question assumes:
- A mother and a father, where the deceased left children: each takes exactly one sixth. The same share, not half.
- Uterine siblings — those related through the mother alone — share equally regardless of sex, by the plain text of 4:12.
- A daughter with no brothers takes half the estate on her own, and two or more daughters take two thirds between them. In many families that is more than any other single claimant receives.
- A wife inherits from her husband and a husband from his wife, but a wife whose husband dies also keeps her mahr and her own property entirely, having owed nothing towards the household from either.
- A grandmother inherits where a grandfather in the equivalent position may not, depending on the configuration.
Work through a few real families in the calculator and the pattern becomes visible: the two-to-one ratio governs one relationship among many, and a great deal of the scheme is either equal or favours the woman.
The reasoning that is given for it
Where the ratio does apply, the classical explanation is not about the worth of the heirs. It is about what each share is obliged to carry.
Under the same body of law, a man owes the mahr at marriage, owes the complete maintenance of his wife — housing, food, clothing, medical care — owes the maintenance of his children, and owes support to his parents and often his unmarried sisters if they need it. None of that is discharged from his wife's wealth, and he cannot require her to contribute a penny of it even if she is the wealthier of the two.
A woman's property, by contrast, is hers alone. Her earnings are hers, her inheritance is hers, her mahr is hers, and she owes no maintenance from any of it — not to her husband, not to her children, not to her household. She may spend it entirely on herself, and if she chooses to contribute to the household that is a gift rather than a duty.
So the two shares are not comparable amounts. His is a gross figure with claims already attached; hers is net. That is the argument, and it is worth understanding on its own terms before agreeing or disagreeing with it.
The honest part
The rationale describes a system of obligations working as designed. Whether it is working that way in a particular family in 2026 is a separate question, and the answer is often no. Plenty of Muslim women support households. Plenty of Muslim men do not maintain their sisters. A rationale that assumes the obligations are being met does not automatically fit a case where they are not.
Contemporary scholars have discussed this, and the range of response is narrower than people expect. The shares themselves are given in the text with named fractions, so the overwhelming majority hold they are not open to revision by changed circumstance — a rule stated numerically in revelation is not treated as a rule of thumb. What is open is everything the scheme deliberately leaves open.
What is open
Two doors are wide, and most people asking this question do not know they are there.
The first is the bequest. Up to a third of the estate may be directed by will to anyone who is not already an heir — an unmarried daughter's guardian, a charity, a foster child, a relative the scheme does not reach. It cannot be used to top up an heir's share, which is precisely the rule that keeps the third from swallowing the scheme, but it is a third of the estate placed entirely at your discretion.
The second is the lifetime gift. Property given away while you are alive is simply not part of the estate when you die, and a parent who wishes to provide more for a particular child in their lifetime may do so. The caution attached is real and often missed: the majority position holds that gifts among children should be even-handed, on the strength of the hadith of Nu'man ibn Bashir, whose father was told to take back a gift made to him alone. A gift with a reason — a child with a disability, a child who has been supporting you — is treated differently from a gift that simply prefers one child.
Between the two, a person who wants a particular daughter provided for has means. What they cannot do is rewrite the fixed shares and call the result an Islamic distribution.
This is not a fatwa. It sets out the positions scholars hold and where they part, so that you know what you are asking about. Your own case turns on facts a page cannot see — put it to someone qualified.