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Wasiyyah Islamic Will Calculator | Compute max one-third bequest

The Wasiyyah (Islamic Will) calculator works out the maximum permissible bequest — one-third of the net estate after debts and funeral costs — and how much remains for the legal heirs.

Last updated: June 2026 · Free · No sign-up required

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Results

Enter values above and click Calculate to see your result instantly.

Quick reference

Step$300k estate example
Estate$300,000
Less debts−$20,000
Less funeral costs−$5,000
Net distributable$275,000
Max wasiyyah (1/3)$91,666.67

description One-third rule

account_balance Debts first

family_restroom Heirs’ share

Interpretation guide

Order of settlementPriority
1. Funeral expensesFirst charge on the estate
2. Debts (incl. unpaid zakat/mahr)Before any distribution
3. Wasiyyah (≤ 1/3)To non-heirs only, by default
4. Fara’id sharesRemaining 2/3+ to Quranic heirs

lightbulb Worked example

Let's say you are using the Wasiyyah (Islamic Will) Calculator. The Wasiyyah (Islamic Will) calculator works out the maximum permissible bequest — one-third of the net estate after debts and funeral costs — and how much remains for the legal heirs. Enter the values that match your situation into the input fields and press calculate — using realistic numbers makes the result directly useful for you.

Result: The calculator instantly applies the formula Max bequest = (estate − debts − funeral) ÷ 3; heirs receive the remainder and returns the result with appropriate precision.

What this means: Read the result in the context of what you are measuring. The step-by-step breakdown lets you confirm the math and understand which input most affects the outcome.

Formula & methodology

Formula: Max bequest = (estate − debts − funeral) ÷ 3; heirs receive the remainder

The Wasiyyah (Islamic Will) Calculator is built on a well-established calculation method. It uses the formula Max bequest = (estate − debts − funeral) ÷ 3; heirs receive the remainder to turn your inputs into a reliable result. The Wasiyyah (Islamic Will) calculator works out the maximum permissible bequest — one-third of the net estate after debts and funeral costs — and how much remains for the legal heirs. The steps are shown on the page so you can follow the reasoning from input to output.

  1. Enter your gross estate, outstanding debts and expected funeral costs.
  2. The net estate is computed in the proper settlement order.
  3. Your intended bequest is compared with the one-third cap; any excess is flagged and the heirs’ share shown.

Worked example: $300,000 estate, $20,000 debts, $5,000 funeral → net $275,000; maximum wasiyyah $91,666.67. An intended $100,000 bequest exceeds the cap by $8,333 unless the heirs consent.

Authoritative source: timeanddate.com

Frequently asked questions

What is the one-third rule in Islamic wills?
From the hadith of Sa’d ibn Abi Waqqas: bequests are capped at one-third of the net estate — "a third, and a third is much". The remaining two-thirds must flow to the Quranic heirs under fara’id.
Can I leave wasiyyah to my children?
Yes — a bequest to an heir who already receives a fixed share is allowed, but the general rule is that you cannot combine a wasiyyah with their inheritance beyond one-third of the estate. The Quranic heirs' fixed shares come first; the wasiyyah is limited to one-third of what remains after debts, and it may go to non-heirs or charity.
What is deducted before the third is measured?
The Wasiyyah (Islamic Will) Calculator is free, private, and accurate: it runs entirely in your browser (no uploads, no accounts), applies the standard calculation, and explains each step so you can verify the result. The Wasiyyah (Islamic Will) calculator works out the maximum permissible bequest — one-third of the net estate after debts and funeral costs — and how much remains for the legal heirs. There is no limit on usage, and it works on any device.
What if my intended bequest exceeds one-third?
The bequest is capped at one-third of the estate after debts and funeral expenses. If your will leaves more than one-third, the excess requires the consent of the heirs; without their approval, the bequest is reduced to one-third. The calculator shows the one-third ceiling for your estate value so you can plan within it.
Do I still need a legal will document?
Yes — the calculator works out the Shariah-compliant distribution, but a legal will document is still necessary for it to take effect in your country's courts: it names the executor, covers burial wishes, witnesses, and format requirements, and ensures your assets are actually transferred according to your bequests. Use the calculator's shares to draft the will with a legal professional.
What does the Wasiyyah (Islamic Will) Calculator do?
The Wasiyyah (Islamic Will) calculator works out the maximum permissible bequest — one-third of the net estate after debts and funeral costs — and how much remains for the legal heirs. The calculator takes your inputs, applies the standard calculation, and returns a clear result so you can make an informed decision without doing the math by hand.
What formula does the Wasiyyah (Islamic Will) Calculator use?
It computes the estate after debts and funeral costs, calculates the one-third bequest ceiling (wasiyyah limit = estate ÷ 3), and then distributes the remaining two-thirds to the Quranic heirs by their fixed shares. Enter your assets, debts, and family structure and the tool returns each heir's share and the wasiyyah capacity.
Is the Wasiyyah (Islamic Will) Calculator free and private?
Yes — the Wasiyyah (Islamic Will) Calculator. There is no sign-up, no paywall, no trial, and no limit on how many calculations you can run. CalcaTools covers its costs with non-intrusive display advertising, so the calculator itself never asks for payment or restricts any feature.
How accurate is the Wasiyyah (Islamic Will) Calculator?
The Wasiyyah (Islamic Will) Calculator applies the standard formula: Max bequest = (estate − debts − funeral) ÷ 3; heirs receive the remainder. It is tested against published worked examples before launch and uses native double-precision arithmetic, so results are accurate to typical precision for the values you enter — with no intermediate rounding that could distort the answer.

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