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Sadaqah Jariyah Calculator | Project Long-Term Impact of Charity

A Sadaqah Jariyah Calculator projects the long-term spiritual and material impact of recurring or one-off charity. Based on the hadith of three continuing rewards after death (Sahih Muslim 1631).

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

$

Set 99 to estimate a lifetime gift.

Results

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

Quick reference

ProjectUnit cost (est.)
Water well$800
Quran copy$10
Orphan month$50
Student month$120
Tree planted$1
Medical consult$25

info Sadaqah Jariyah Calculator

Free islamic calculator — enter your numbers and get an instant, accurate result.

info Private by design

Everything runs locally in your browser. No uploads, no accounts, no tracking.

info Works everywhere

Fully responsive and mobile-friendly — calculate on any device, any time.

info Educational

Includes the formula and step-by-step explanation so you understand the math, not just the answer.

Interpretation guide

$50/month becomesOver
$6,000 → 7 wells10 years
$15,000 → 18 wells25 years
$24,000 → 30 wells40 years

lightbulb Worked example

Let's say you are using the Sadaqah Jariyah Calculator. A Sadaqah Jariyah Calculator projects the long-term spiritual and material impact of recurring or one-off charity. Based on the hadith of three continuing rewards after death (Sahih Muslim 1631). 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 Lifetime total = amount × payments/yr × years; impact units = ⌊total ÷ unit cost⌋ 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: Lifetime total = amount × payments/yr × years; impact units = ⌊total ÷ unit cost⌋

The Sadaqah Jariyah Calculator is built on a well-established calculation method. It uses the formula Lifetime total = amount × payments/yr × years; impact units = ⌊total ÷ unit cost⌋ to turn your inputs into a reliable result. A Sadaqah Jariyah Calculator projects the long-term spiritual and material impact of recurring or one-off charity. Based on the hadith of three continuing rewards after death (Sahih Muslim 1631). The steps are shown on the page so you can follow the reasoning from input to output.

  1. Enter your giving amount, frequency (monthly/quarterly/annual/one-off) and time horizon.
  2. The lifetime total is computed and converted into whole units of your chosen project type.

Worked example: $50 monthly for 25 years = $15,000 ≈ 18 water wells — each serving ~1,000 people for a decade or more, with reward continuing as long as the benefit flows.

Authoritative source: Sahih Muslim 1631 — Continuing Charity

Frequently asked questions

What is Sadaqah Jariyah?
Sadaqah Jariyah is ongoing charity whose reward continues after the donation itself, based on the hadith that three deeds continue after death: ongoing charity, beneficial knowledge, and a righteous child. Examples include building a well or school, planting trees, or funding an endowment. The calculator projects the lifetime total of recurring giving and translates it into impact units.
What counts as Sadaqah Jariyah vs ordinary sadaqah?
The Sadaqah Jariyah 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. A Sadaqah Jariyah Calculator projects the long-term spiritual and material impact of recurring or one-off charity. Based on the hadith of three continuing rewards after death (Sahih Muslim 1631). There is no limit on usage, and it works on any device.
How much does a water well cost?
Yes — the Sadaqah Jariyah 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.
Is Sadaqah Jariyah the same as zakat?
No — zakat is the obligatory annual wealth tax of 2.5% with fixed rules, timing, and recipients. Sadaqah Jariyah is voluntary ongoing charity, given at any time in any amount, whose reward continues beyond the donation — like a well, school, or endowment. One is a duty, the other a recommended act of worship with compounding reward.
Can I give Sadaqah Jariyah on behalf of someone deceased?
Yes — scholars agree that charity given on behalf of a deceased person reaches them, based on hadiths such as the man who asked the Prophet whether giving charity for his deceased mother would benefit her and was told it would. Ongoing projects like water wells or Quran distributions made in their name are among the most recommended forms.
What makes charity “jariyah” — ongoing — rather than one-off?
The hadith of three continuing rewards (Sahih Muslim 1631) names ongoing charity, beneficial knowledge, and a righteous child who prays for one. A water well or a funded student's education keeps benefiting after the giver is gone; a single meal, while virtuous, doesn't compound the same way. The ongoing kind is what's projected.
How are “impact units” estimated?
By dividing the projected lifetime giving by a per-unit cost supplied by you — e.g., $50 per water filter or $200 per student's school year. Total ÷ unit cost = units funded. The figure is only as honest as the unit cost entered, so use real figures from the charity.
Does giving small amounts regularly beat one large donation?
In total impact, the lifetime sum is what matters — $10/month for 20 years is $24,000 regardless of rhythm. Regular giving has the practical edge of habit and of funding charities' ongoing costs. The lifetime total makes different giving patterns comparable.
Is projected impact the same as guaranteed reward?
No — material impact (meals, wells, students) is projected from the giving plan; spiritual reward rests on sincerity and divine acceptance, which no formula measures. Treat the numbers as planning figures for generosity, not as a ledger of the unseen.

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