Quick Answer
A zakat calculator totals your zakatable assets (cash, gold, silver, investments, business inventory and receivables), subtracts eligible debts, checks whether the net amount meets the Nisab threshold, and applies the fixed 2.5% rate: Zakat = (Total Assets − Debts) × 0.025. Nisab is the market value of 612.36 g of silver (recommended) or 87.48 g of gold.
The Zakat Calculation Rule
Zakat is charged at 2.5% of net zakatable wealth, which is exactly one fortieth. The calculator aggregates your cash, gold, silver, investments and business assets, subtracts debts payable within the next 12 months, and compares the result to the Nisab threshold. Below Nisab, nothing is due. At or above it, 2.5% applies.
Payable only when that net figure is greater than or equal to Nisab. The calculator floors net wealth at zero, so debts larger than assets produce no liability rather than a negative one.
The rate is fixed and never varies with the amount. If you know the Zakat you paid and want to recover the wealth it was charged on, that is a reverse percentage problem — multiply by 40.
What Nisab Is, and Which Standard Applies to You
Nisab is the minimum wealth you must hold before Zakat becomes obligatory. It is not defined as a sum of money — it is defined as a weight of metal, and converted to your currency at today’s price. That is why the threshold moves every day, and why the calculator asks for a gold or silver price even if you hold neither.
Two weights are used, both confirmed by the National Zakat Foundation’s Nisab guidance:
| Nisab standard | Grams | Tola | Troy ounces | When it applies |
|---|---|---|---|---|
| Silver (the calculator’s default) | 612.36 g | 52.5 | 19.6878 | Any mix of assets — cash, gold, silver, business stock, investments |
| Gold | 87.48 g | 7.5 | 2.8125 | Only when your zakatable wealth is purely gold and nothing else |
The tola figures are not rounded conveniences. The calculator uses 1 tola = 11.664 g, and at that rate the gold Nisab is exactly 7.5 tola and the silver Nisab is exactly 52.5 tola — which is why those two numbers are quoted verbatim across South Asia. The troy-ounce equivalents, by contrast, land on nothing memorable.
Why the silver Nisab is exactly seven times the gold one
Divide 612.36 by 87.48 and you get 7, with no remainder. That is not a coincidence of rounding. The classical Nisab is 20 gold dinars or 200 silver dirhams — a coin count ratio of 1:10 — and the dirham was struck at exactly seven tenths of a mithqal, the dinar’s weight. Ten dirhams weighed exactly seven mithqals.
| Quantity | Gold | Silver | Ratio |
|---|---|---|---|
| Coins in the Nisab | 20 dinars | 200 dirhams | 1 : 10 |
| Weight per coin | 4.374 g (mithqal) | 3.0618 g (dirham) | 1 : 0.7 exactly |
| Total weight | 87.48 g | 612.36 g | 1 : 7 exactly |
| Alternative scholarly weights | 85 g | 595 g | 1 : 7 exactly |
The last row is the real test. NZF publishes a second opinion of 85 g and 595 g, and 595 ÷ 85 is also exactly 7 — because both pairs descend from the same 7:10 coin rule. The two opinions disagree about absolute weight by 2.92%, but they cannot disagree about the ratio.
The two standards only agree when gold costs seven times silver
Because the weight ratio is fixed at 7, the money value of the two thresholds depends on one thing only — the gold-to-silver price ratio. Call that ratio R. The gold Nisab is worth R ÷ 7 times the silver Nisab, whatever the actual prices are. At R = 7 the two standards are identical. Above it, they diverge fast.
| Gold : silver price ratio | Gold Nisab ÷ silver Nisab | Effect on who owes Zakat |
|---|---|---|
| 7 | 1.000× | The two standards are the same threshold |
| 20 | 2.857× | Gold standard excludes 2.9× more wealth |
| 40 | 5.714× | |
| 60 | 8.571× | |
| 80 | 11.429× | |
| 90 | 12.857× | Gold Nisab is nearly 13× the silver one |
| 100 | 14.286× |
Check the current ratio against the LBMA precious metal price benchmarks and divide by 7 to see how far apart the two thresholds sit today. Modern ratios have run far above 7 for a very long time, which is precisely why the silver standard is the safer default: it sets a much lower bar, brings more wealth into the obligation, and benefits recipients.
How to Use the Zakat Calculator
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Pick your currency and Nisab standard
Nine currencies are supported: PKR, USD, GBP, EUR, SAR, AED, INR, BDT and MYR. Leave the Nisab standard on Silver unless your wealth is purely gold. Today’s gold and silver prices fill in automatically where available.
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Switch on only the categories you actually have
Tap the chips for Cash & Savings, Gold, Silver, Investments, Business or Debts. Sections you do not switch on stay hidden, and switching one off clears its values so a forgotten figure cannot quietly inflate your total.
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Set the unit and the purity before entering a weight
For gold and silver, choose Grams, Tola or Ounces, then set Purity — 24K for bullion and coins, 22K or 18K for most jewellery, Sterling for silverware. Enter the weight and the pure-metal price for that unit. A live hint shows the pure equivalent your holding is actually valued at.
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Read the results panel
It shows total assets, total deductions, net zakatable wealth, your Nisab threshold and the 2.5% figure. The status pill states plainly whether you are above Nisab, below it, or still missing a metal price.
What Counts as Zakatable Wealth
The calculator’s six sections map to the categories scholars treat as zakatable. Enter the market value on your Hawl date, not the price you paid.
| Section | What belongs in it | What does not |
|---|---|---|
| Cash & Savings | Cash in hand, all bank balances in every currency, prize bonds, savings certificates | — |
| Gold | All gold you own by weight — bars, coins, jewellery | Gold-coloured or plated items |
| Silver | All silver you own by weight | Stainless steel, plated cutlery |
| Investments | Stocks, mutual funds, ETFs, crypto — and the balance of a 401k, RRSP, ISA or workplace pension you can access | — |
| Business & Property | Stock-in-trade at resale value, plus receivables you expect to collect and rent already received | Machinery, vehicles, office equipment, the premises |
| Debts | Deducted, not added — see below | — |
Two distinctions do most of the work here. Business inventory is valued at resale price, not cost price, and the tools you trade with are never zakatable — only the goods you trade in. A delivery van is exempt; the stock inside it is not. Your home is exempt; a flat bought to resell is stock.
Which Debts You Can Deduct
Only debts payable within the next 12 months reduce your zakatable wealth. Credit-card balances, personal loans and outstanding bills come off in full. Long-term financing does not.
For a mortgage or any multi-year facility, deduct the next 12 months of instalments only — not the outstanding balance. The reason is structural: allowing the full balance of a 25-year mortgage would cancel the obligation for as long as the mortgage ran, which is not what the deduction is for. If you are unsure what twelve months of instalments actually comes to, work the monthly figure out with the EMI calculator and multiply by twelve.
Doubtful or disputed receivables work the other way: you may leave them out of your assets until they are actually collected.
Worked Examples
Currency is irrelevant to the arithmetic, so these use plain units. Where a silver price is needed it is stated.
1. A straightforward year
Assets of 20,000 and deductible debts of 3,000 give net wealth of 17,000. With silver at 1.05 per gram, Nisab is 612.36 × 1.05 = 642.98. Net wealth clears it comfortably, so Zakat is 17,000 × 2.5% = 425.00.
2. Debts can push you below Nisab
With silver at 1.00 per gram, Nisab is 612.36. Someone holding 700 is above the threshold and would owe 17.50. Add a deductible debt of 200 and net wealth becomes 500 — below Nisab, and Zakat falls to zero, not to a smaller amount. The comparison is always made against the net figure, never the gross one.
3. The same person, two standards, two answers
Take 5,000 of wealth, with silver at 1.00 per gram and gold at 90 — a price ratio of 90.
| Standard | Nisab threshold | Above it? | Zakat due |
|---|---|---|---|
| Silver (612.36 g) | 612.36 | Yes | 125.00 |
| Gold (87.48 g) | 7,873.20 | No | 0.00 |
The gold threshold is 12.857× higher — exactly 90 ÷ 7 — and it takes the same person from owing 125 to owing nothing. This is the choice the Nisab Standard selector is making on your behalf.
4. The threshold is a cliff, not a ramp
Zakat applies to your whole net wealth once you meet Nisab, not to the amount by which you exceed it. With Nisab at 612.36, net wealth of 611.36 owes nothing, while net wealth of 612.36 owes 15.31. One unit of wealth changes the bill by 15.31.
Charging only the excess would have produced 0.025 at that same point — 612.36 times smaller. It is a common misreading, and it is worth knowing which way the calculator resolves it.
Grams, Tola and Ounces
The calculator converts with 1 tola = 11.664 g and 1 troy ounce = 31.1035 g. Selecting a unit relabels the price field and rescales the Nisab together, so a per-tola price and a tola weight stay consistent — the silver Nisab simply becomes 52.5 × the per-tola price, and the gold Nisab 7.5 × it.
| Entered | In grams | Note |
|---|---|---|
| 5 tola | 58.32 g | Below the gold Nisab |
| 7.5 tola | 87.48 g | Exactly the gold Nisab |
| 10 tola | 116.64 g | Above it |
| 52.5 tola | 612.36 g | Exactly the silver Nisab |
The trap is the unit toggle itself. Type a tola count while the toggle still reads Grams and the holding is understated by a factor of 11.664; do it with ounces and the factor is 31.1035. Neither produces an error — the total simply comes out far too low. Set the unit first, then read the live gram hint under the weight field to confirm.
Purity — set it before you enter a weight
Nisab is defined on pure metal, and the price that fills in automatically is the pure spot price. Jewellery is rarely pure, so the calculator carries a Purity control: pick your carat and it converts your weight to its pure equivalent before valuing it. Carat is simply parts of gold in 24, so 22K is 22 ÷ 24.
| Purity | Gold content | Less metal than pure | Overstated by, if you skip it |
|---|---|---|---|
| 24K — pure | 100% | — | — |
| 22K | 91.7% | 8.33% | 9.09% |
| 21K | 87.5% | 12.5% | 14.29% |
| 18K | 75% | 25% | 33.33% |
| 14K | 58.3% | 41.67% | 71.43% |
When Zakat Is Due
Zakat falls due once your wealth has stayed at or above Nisab for one full lunar year — the Hawl. Your Hawl date is the anniversary of the day your wealth first reached Nisab, and you value everything as it stands on that date. Dips during the year do not reset the clock as long as you are at or above Nisab at both ends.
The lunar year runs about 354.37 days against the Gregorian 365.2425, a difference of roughly 10.9 days each year. Anchoring your Hawl to a fixed Gregorian date therefore drifts, and the drift compounds: 33 Gregorian years contain 34.01 lunar years. A payer who quietly switches to “every 1 March” skips a full year’s Zakat roughly once every 33 years.
