Inheritance calculator

Islamic inheritance is not open-ended discretion. It is a precise system set out in Surah an-Nisa, detailed by the Sunnah and refined by the rulings of the Companions. This calculator applies that system to the heirs you select and explains the reason behind every share, so you understand the ruling and not only the number.

Claims settled before any division

1. Funeral and burial costs.
2. Debts owed by the deceased, whether owed to people or to God, such as unpaid zakat and expiations.
3. A bequest, capped at one third of what remains after debts, and not valid for an heir unless the other heirs consent.
4. Whatever remains is the net estate divided among the heirs, and that is the amount this tool distributes.

Fixed sharers and residuaries

• Fixed sharers (ashab al-furud) receive stated fractions: one half, one quarter, one eighth, two thirds, one third, one sixth. Spouses, parents, daughters and sisters belong here.
• Residuaries (asaba) take what remains, in order of closeness: son, son's son, father, grandfather, brothers, their sons, uncles, then their sons.
• One heir can combine both, like a father alongside daughters who takes a fixed sixth plus the residue.

Blocking: why some relatives receive nothing

A nearer heir excludes a more distant one. A son blocks the son's sons, the father blocks the grandfather and the siblings, the mother blocks the grandmothers, and surviving children block the maternal half siblings. Blocking can also be partial rather than total, as when a husband's half drops to a quarter because children survive. That is why the tool lists separately everyone who does not inherit in your case, with the reason.

Awl and radd

When the fixed shares add up to more than the whole estate the case undergoes awl and every share is scaled down proportionally, as in the classic husband, two sisters and mother case. When a surplus remains and there is no residuary, the surplus returns (radd) to the fixed sharers other than the spouse. The tool flags both situations and shows the base of the case.

The hard cases this tool covers

• The two Umariyyatan: the mother takes one third of the remainder after the spouse's share when the father survives.
• Grandfather with siblings: we follow Zayd ibn Thabit, adopted by the majority, giving the grandfather the best of sharing, one third of the remainder, or one sixth of the estate, and we note Abu Hanifa's differing view.
• Musharraka (Himariyya): full siblings share the third with maternal siblings, following Umar's judgment.
• Akdariyya: husband, mother, grandfather and a sister, settled on a base of twenty seven.

This is an educational tool that follows the majority juristic view. It is not a fatwa and not legal or financial advice. Real estates can involve endowments, companies, property and local family law, so consult a competent court or a recognised fatwa body before acting. See also our disclaimer.