Zakat calculations: the rate is not the nisab or the hawl
Dividing an amount by 40 is straightforward. Establishing what the amount represents—and whether the relevant conditions have been met—is a different task. A clear record of holdings, prices and dates is more useful than a precise figure built on an unknown assumption.
Separate arithmetic from checking the conditions
ZATCA’s individual-zakat guide includes nisab and a lunar hawl among the conditions for the covered holdings. It gives 85 g of pure gold and 595 g of pure silver, using the lower threshold for cash under its method. The lunar-hawl rate used here is 2.5%.
A cash percentage can be calculated without a metal price, but that does not establish whether the nisab was reached. Treat that result as a rate estimate, not a personal ruling that the amount is due.
References: ZATCA — Individual zakat guide, March 2023, pp. 12–15
Record what you need before adding it up
A short worksheet can record the asset type, amount owned, measurement unit and—where needed—the price source and date. Do not add grams of gold directly to a cash balance, or treat a price per ounce as a price per gram.
For gold, distinguish the item’s weight from its pure-gold content. Check its actual karat value rather than relying on a marketing description or a price with an unknown unit. Keep these assumptions with the result so it can be reviewed later.
Use a declared method without hiding disagreement
This calculator follows a no-debt-deduction convention for existing holdings. The cited reference acknowledges disagreement; this is not a claim of consensus or a ruling for your circumstances. If an actual repayment has reduced a balance, do not count money no longer held and then deduct the repayment again.
The scope is educational individual holdings, not a comprehensive company, crop or ownership assessment. If an asset’s inclusion or hawl is unclear, prepare the relevant facts for a qualified adviser instead of selecting inputs merely to obtain an answer.
References: Ibn Baz — Zakat when a debt exists; a declared jurisprudential view
What the number establishes—and what it does not
Suppose a cash balance is 12000 SAR. The rate calculation is 12000 ÷ 40 = 300 SAR. Without a nisab check, 300 remains a percentage estimate, not a finding that the conditions are satisfied.
For a separate purity example, 120 g of 18-karat gold contains 120 × 18 ÷ 24 = 90 g of pure gold. This supplies neither a market price nor a ruling about a particular item: it shows why weight, purity and monetary valuation need to stay distinct.