Sadaqah Jariyah Calculator
Last updated: June 2026 · Free · No sign-up required
Enter values above and click Calculate to see your result instantly.
Quick reference
| Project | Unit cost (est.) |
|---|---|
| Water well | $800 |
| Quran copy | $10 |
| Orphan month | $50 |
| Student month | $120 |
| Tree planted | $1 |
| Medical consult | $25 |
mosque Calculated to Shariah-compliant formulas
Every Islamic calculator on CalcaTools uses formulas from recognised Shariah authorities — the Hilal Committee's Hijri conversion tables, the MWL/ISNA/Umm al-Qura prayer-time methods, the four-school consensus for Zakat Nisab, and the Faraid distribution rules from classical fiqh. The exact authority is cited on every tool page.
menu_book Sunni & Shia rules side by side
For tools where the calculation differs between schools (Faraid inheritance, certain Zakat triggers, prayer-time conventions), we surface the choice as a selector and document the difference in the methodology block. Pick the school that matches your tradition — the answer adjusts.
savings Zakat with the live Nisab
Zakat tools fetch the current spot gold/silver price (or let you enter your local rate) so the Nisab threshold reflects today's value, not a stale figure from last year. The 2.5% rate is the standard hawl-based calculation; agricultural Zakat (1/10 or 1/20) is available on the dedicated Ushr calculator.
verified For guidance, not a fatwa
These calculators give you the number — they do not give a fatwa. For complex personal situations (inheritance with revoked rights, mixed-asset Zakat, late prayer makeup rules), please confirm with a qualified scholar in your tradition. We're here to help with the arithmetic, not to replace your local imam.
Interpretation guide
| $50/month becomes | Over |
|---|---|
| $6,000 → 7 wells | 10 years |
| $15,000 → 18 wells | 25 years |
| $24,000 → 30 wells | 40 years |
Formula & methodology
Formula: Lifetime total = amount × payments/yr × years; impact units = ⌊total ÷ unit cost⌋
- Enter your giving amount, frequency (monthly/quarterly/annual/one-off) and time horizon.
- 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
Explore the full Islamic toolkit
Every CalcaTools Islamic calculator — zakat and charity, prayer times, the Hijri calendar, halal finance, and family tools — cross-checked against the Umm al-Qura calendar and classical fiqh references.