Islamic Inheritance Calculator (حاسبة المواريث) - Quranic Shares (الفرائض) for Spouse, Children, Parents

What is the Islamic inheritance calculator?

This calculator computes the distribution of a Muslim's estate (الميراث) according to the Quranic rules of inheritance (الفرائض). Enter the total estate value (after funeral costs, debts, and bequests up to 1/3) and which heirs are alive; the calculator returns each heir's share as a fraction of the estate AND the absolute amount in your currency, plus the per-person amount when an heir type has multiple people (e.g., 3 sons). It handles the special cases of Al-Awl (proportional reduction when shares overflow), Al-Radd (proportional return when shares underflow with no Asabah), and Umariyatan (the spouse+father+mother special rule).

The six Quranic shares (الفروض المقدرة)

Islam prescribes exactly six fixed shares in the Quran: 1/2, 1/4, 1/8, 2/3, 1/3, and 1/6. (1) Husband: 1/2 if no descendants, 1/4 with descendants. (2) Wife: 1/4 if no descendants, 1/8 with descendants. (3) Mother: 1/3 if no descendants and fewer than 2 siblings, otherwise 1/6. (4) Father: 1/6 (always when descendants exist) plus residue (Asabah) if only daughters or no descendants. (5) One daughter (no son): 1/2. Two or more daughters (no son): 2/3 collectively. (6) Full sisters (when no son/daughter/father): 1/2 (one) or 2/3 (two or more), or join brothers as Asabah at 2:1.

Asabah - the residuary heirs

After the Furudh holders take their fixed shares, the remainder (residue / تركة عاصبة) goes to the Asabah - male relatives in priority order: (1) Sons (with daughters joining at 2:1 ratio - the daughter takes Asabah residue alongside, NOT her separate Furudh of 1/2 or 2/3). (2) Father - if no male descendants. He takes his 1/6 Furudh PLUS the residue when only daughters exist. (3) Full brothers (with sisters at 2:1) - only when no descendants AND no father. The 2:1 male:female ratio is documented in Surat al-Nisa' verse 11 (للذكر مثل حظ الأنثيين).

Al-Awl and Al-Radd (العول والردّ)

Al-Awl (العول, 'overflow'): occurs when the sum of fixed shares exceeds 1 (i.e., the heirs are entitled to MORE than 100% of the estate). The classic example: husband + 2+ daughters + father + mother = 1/4 + 2/3 + 1/6 + 1/6 = 1.25. The Awl rule (introduced by Umar ibn al-Khattab and adopted by all four Sunni schools) proportionally reduces all shares so the total equals 1. Al-Radd (الردّ, 'return'): the opposite - shares total less than 1 with no Asabah residuary. The remainder is returned to non-spouse Furudh holders in proportion. The spouse does not participate in Radd per the majority view.

The Umariyatan special case (العمريتان / الغراويتان)

When the only heirs are: spouse (husband or wife) + father + mother (no descendants, fewer than 2 siblings), Umar ibn al-Khattab ruled that the mother takes 1/3 of the REMAINDER after the spouse's share, not 1/3 of the whole estate. This keeps the father's share equal to twice the mother's (preserving the 2:1 ratio of male:female parents). Adopted by all four Sunni schools. Example with husband: husband 1/2, then of the remaining 1/2: mother gets 1/3 × 1/2 = 1/6, father gets 2/3 × 1/2 = 1/3 (= 2× mother). Total: 1/2 + 1/6 + 1/3 = 1 ✓.

Order before distribution: funeral → debts → bequest → Furudh

Before the Quranic shares are calculated, four things come off the top in this order: (1) Funeral and burial expenses (التجهيز والتكفين). (2) All outstanding debts owed by the deceased (الديون). (3) Any valid bequest (الوصية) - but capped at 1/3 of the remaining estate AND cannot be given to a Quranic heir without the consent of other heirs (Surat al-Baqarah 180, plus Prophet's hadith). What remains after these three is the Tarikah (تركة) - that's what you enter as the 'Estate' in this calculator. Bequests to non-heirs in excess of 1/3 are reduced to 1/3 unless heirs unanimously consent.

Scope and limitations

Heirs supported: spouse, sons, daughters, father, mother, full brothers, full sisters. NOT yet supported: grandparents when parents alive or absent in complex configurations, paternal half-siblings, maternal half-siblings (different rules - take 1/6 (one) or 1/3 (two+) regardless of sex), grandchildren through son, all distant relatives (Dhawu al-Arham like uncles/aunts/cousins), the Mushtarakah case where maternal and full siblings share the same Furudh, the Akdariyah case (specific to Hanbali/Maliki involving grandfather + grandmother + sister), and Shi'a Ja'fari rules. The calculator is for educational and planning use; for binding distributions, consult Saudi Ministry of Justice's Mawarith service or a qualified Sharia scholar.

Related calculators on HisabWeb

Zakat Calculator - for the obligatory 2.5% annual charity on wealth (separate from inheritance). Tafqit (Number to Arabic Words) - useful for writing inheritance amounts on legal documents and waqf paperwork. Saudi Net Salary Calculator and End of Service Gratuity Calculator - to compute the deceased's outstanding entitlements that should be added to the estate. Date Difference Calculator - for tracking the Iddah period and other Sharia-relevant durations.

Frequently asked questions

After paying funeral costs, debts, and bequests (up to 1/3 to non-heirs), the remaining estate (Tarikah) is distributed: (1) Fixed Quranic shares (Furudh) go to spouse, parents, daughters (if no sons), and sisters (in some cases). Six fractions are used: 1/2, 1/4, 1/8, 2/3, 1/3, 1/6. (2) The remainder (Asabah) goes to male relatives in priority order: sons first, then father, then full brothers. Daughters join sons and sisters join brothers at a 2:1 male:female ratio. (3) Two special adjustments: Al-Awl (proportional reduction if shares exceed 1) and Al-Radd (proportional return if shares are less than 1 with no Asabah).

The wife receives 1/4 of the estate if her husband died WITHOUT descendants (no sons or daughters from any marriage). She receives 1/8 if there ARE descendants. If there are multiple wives, they share the 1/4 or 1/8 equally between them (so each of 2 wives gets 1/16 if there are children). The rest of the estate goes to children, parents, and Asabah relatives.

One daughter alone (with no sons): she receives 1/2 of the estate as her Quranic share, with the remainder going to other heirs (father as Asabah, mother 1/6, spouse if any). Two or more daughters (no sons): they SHARE 2/3 of the estate equally between them, with the remainder going to other heirs. If there are sons, daughters do NOT take a fixed share - instead they join the sons in taking the Asabah residue at a 2:1 ratio (each son gets twice what each daughter gets).

Al-Awl applies when the sum of fixed Quranic shares exceeds the whole estate (i.e., overlapping claims add to more than 100%). Classic case: husband + 2+ daughters + father + mother = 1/4 + 2/3 + 1/6 + 1/6 = 5/4 = 1.25. The remedy (introduced by Umar ibn al-Khattab and adopted by all four Sunni schools): proportionally reduce every share. In this case, multiply each share by 4/5 so the total becomes 1.0. So the husband gets 1/4 × 4/5 = 1/5, daughters 2/3 × 4/5 = 8/15, etc.

Yes, with strict limits. A Muslim may make a bequest (Wasiyya) of UP TO 1/3 of the estate to non-heirs (charity, friends, anyone not in the Quranic heir list). Bequests to existing Quranic heirs are NOT allowed unless the other heirs all consent (since the Quran already specifies their shares). Funeral costs, debts, and the bequest (up to 1/3) come off the top BEFORE the fixed shares are calculated. The HisabWeb calculator's 'Estate value' input is the amount AFTER these deductions.