Simulate the distribution of your estate according to Islamic Inheritance with Mirathly - a free Islamic Inheritance calculator.
Why Mirathly?
When I first started building the MuslimMoney Will Kit, I benefitted tremendously from calculators from ShariaWiz and ILMSummit. I’ve recommended those calculators and continue to do so.
So why build another calculator?
My motivation for creating the Mirathly - Islamic Inheritance Calculator was born from a specific need. I wanted to build a tool that wasn't just a calculator, but a direct companion to the process of creating a will.
I envisioned a tool that did three things exceptionally well:
- Run Quick Simulations: When you’re planning your will, you often just want to run some rough numbers. I wanted a tool where you could easily plug in an estate value and instantly see the dollar-value distribution for each heir. This helps make the abstract fractions of inheritance tangible and real.
- Act as a Teaching Tool: The rules of Mawarith are a beautiful and deep part of our tradition. I wanted to give users a "peek behind the curtain" to understand how these calculations work. Mirathly does this by showing you the specific rules applied in your scenario (Fard, Ta'sib, etc.) and providing clear, simple explanations of core Islamic inheritance concepts and even the rules for each specific heir.
- Bridge the Gap to the Will Template: Most importantly, Mirathly was designed to integrate directly with the MuslimMoney Will Kit by providing a "Schedule A Case Match," which tells you the exact clause to use in your will, taking the guesswork out of the process.
Making Mirathly Accurate
In 2021, the Journal of Islamic Thought and Civilization (JITC), published “An Appraisal of Online Inheritance Calculators.” The paper uses 20 specific inheritance scenarios to test the accuracy of calculators.
I ran Mirathly through each of the tests and here were the results:
Mirathly achieved 100% accuracy for all in-scope calculations.
The table below shows a case-by-case breakdown of its performance.
Test # | Scenario Summary | Principle Tested | 🧮 Mirathly Result | Notes |
1 | Husband, Parents, Sons | Standard Distribution | âś… Pass | |
2 | Wife, Uterine Brother, Full Brother | Standard Distribution | âś… Pass | |
3 | Parents, Wife, Daughter | Residuary Share for Father | âś… Pass | |
4 | Father, Daughter, Son's Daughter | Residuary Share for Father | âś… Pass | |
5 | Husband, Uterine Brothers, Full Sisters | 'Awl (Reduction) | âś… Pass | |
6 | Wife, Mother, Sisters | 'Awl (Reduction) | âś… Pass | |
7 | Parents, Wife, Daughter, Son's Daughter | 'Awl (Reduction) | âś… Pass | |
8 | Father, Son, Other Relatives | Hajb (Blocking) | âś… Pass | |
9 | Wife, Daughter, Full Sister, Paternal Cousin | Hajb (Blocking) | âś… Pass | |
10 | Daughter, Son's Daughter, Mother, Sister | Hajb (Blocking) | âś… Pass | |
11 | Grandmother, Daughter, Son's Daughter | Radd (Return) | âś… Pass | |
12 | Husband, Two Daughters | Radd (Return) | âś… Pass | |
13 | Husband, Maternal Uncle | Dhawil Arham | N/A | Follows the Maliki, Shafi’i and Hanbali position |
14 | Daughter's Son, Sister's Son | Dhawil Arham | N/A | Follows the Maliki, Shafi’i and Hanbali position |
15 | Wife, Father, Mother | Umariyyatan | âś… Pass | |
16 | Husband, Father, Mother | Umariyyatan | âś… Pass | |
17 | Husband, Mother, Grandfather | Grandfather & Parents | âś… Pass | |
18 | Husband, Mother, Uterine & Full Brothers | Himariyya | âś… Pass | Follows the Maliki/Shafi'i position |
19 | Mother, Full Sister, Grandfather | Grandfather & Siblings | âś… Pass | Follows the Maliki, Shafi'i, Hanbali position |
20 | Husband, Mother, Full Sister, Grandfather | Al-Akdariyya | âś… Pass |
If you happen to find an error or a bug in the calculator, please let me know!
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Written by Farooq Maseehuddin
Farooq Maseehuddin is the founder of MuslimMoney.co, a Canadian platform dedicated to helping Muslims take control of their personal finances.
He teaches across a range of topics including budgeting, investing, financial planning, Islamic inheritance, money conversations in families, and how to teach kids about money—all through both practical tools and traditional Islamic guidance.
Farooq holds a B.Ed. and M.Ed. from the University of Alberta and has spent nearly two decades as a high school teacher and Muslim community organizer.