Zakat is one of the five pillars of Islam and an act of worship as much as a transfer of wealth. The arithmetic is straightforward: qualifying assets are added up, certain liabilities deducted, the remainder compared with the nisab threshold, and if it exceeds that threshold a proportion — conventionally a fortieth, or 2.5 percent — becomes due after a full lunar year. The zakat calculator above performs that arithmetic. What it does not do, and what no calculator can do, is decide the questions on which scholars genuinely differ.
Arb Digital takes the same approach here as on any page where authority matters: the tool computes, it does not rule. Every point where recognised scholars hold different positions — the nisab standard, long-term debt, pensions and worn jewellery — appears as something you set, with the reasoning behind each option written out. The defaults follow widely used institutional practice and are named as such, not presented as the answer.
What This Zakat Calculator Does
It totals the asset classes on which zakat is generally agreed to fall: cash and bank balances, gold and silver by weight at a price you enter, trade goods held for resale at what they would sell for, debts owed to you that you expect to recover, and the share of investments and pensions you consider to be in your possession. It then deducts the liabilities you select, compares the net figure against the nisab, and applies the rate.
The gold and silver prices are inputs, never fetched or fixed. The values loaded on the page are placeholders that let you see a worked example immediately; they are not market rates and should be replaced with today's price per gram from a source you trust before the result means anything. This is the same treatment used by our gold melt value calculator, and for the same reason: a stale precious metal price silently produces a wrong answer.
The scope is limited to zakat on wealth. Zakat al-fitr, the separate obligation tied to the end of Ramadan, is a fixed measure of staple food per person rather than a percentage of wealth. Agricultural produce and livestock have their own thresholds and rates, which are outside what a general calculator can represent responsibly.
How to Use It
- Set the nisab standard you follow. Silver is the default because the lower threshold is the more widely recommended institutional position. Both gold figures in the list are in current use, and you can enter a custom weight if your local authority publishes one.
- Replace both metal prices with today's price per gram. The nisab value moves with the metal price, so this step is not optional.
- Enter your assets on your zakat anniversary — the date one lunar year after your wealth first reached nisab. Zakat is assessed on what you hold on that date, not on an average across the year.
- Choose how pensions, investments and long-term debt are treated. These are the settings where positions differ most, and the hints beside each explain what the alternatives are.
- Read the net figure against the nisab. If net zakatable wealth is below the threshold, no zakat is due on wealth for that year, and the tool says so rather than returning a number.
The Calculation, Step by Step
The nisab value is a weight of metal multiplied by a price:
Nisab = nisab weight in grams × price per gram of the chosen metal
The obligation itself is:
Zakat = (zakatable assets − deductible liabilities) × rate, if that net figure is at or above the nisab
Work through the values loaded above. On the silver standard, 612.36 grams at a placeholder price of 1.00 per gram gives a nisab of 612.36. Assets are 8,000 in cash, 50 grams of gold at 80.00 per gram which is 4,000, 200 grams of silver at 1.00 which is 200, trade stock of 3,000, recoverable debts of 1,200, and 6,000 of investments counted in full. That totals 22,400.
Deductions are 1,400 of bills due now, plus twelve months of a 500 monthly instalment on the long-term debt, which is 6,000. Total deductions are 7,400, so net zakatable wealth is 15,000. That is comfortably above the nisab of 612.36, so zakat is due at 2.5 percent: 15,000 × 0.025 = 375.00.
Change one setting and the answer changes honestly. Deducting the full 20,000 balance would take net wealth to 1,000 and zakat to 25.00; deducting nothing for long-term debt gives 21,000 and zakat of 525.00. That spread is not a flaw in the tool. It is the actual range of scholarly opinion, which is why the setting is visible rather than buried.
Gold or Silver Nisab, and Why It Matters
The nisab was set as a weight of metal, not as a sum of money, and the two metals have drifted enormously apart in relative value since. The commonly cited weights are 87.48 grams of gold and 612.36 grams of silver, published by Islamic Relief Worldwide in its explanation of nisab, which also records that most scholars advise using the silver figure because the resulting threshold is lower and therefore brings more wealth into the obligation.
The counter-argument is set out by the Zakat Foundation of America's summary of nisab and calculation, which uses roughly 85 grams of gold and argues that the gold measure is the more stable and more just representation of the wealth level the threshold was meant to identify. Both are serious positions held by serious institutions, and the practical difference is large: at any recent price relationship, the silver threshold is a small fraction of the gold one.
No arithmetic resolves this, which is why the calculator offers both. If your local mosque, national zakat body or the scholar you follow publishes a figure, use that; the custom option exists for that case. Our grams to ounces converter and weight converter help if your holdings are recorded in troy ounces.
The Lunar Year and When Zakat Falls Due
Zakat on wealth is not a calendar-year tax. It becomes due when wealth has been held at or above the nisab for one full lunar year, and the anniversary of that date is your zakat date thereafter. The lunar year is about eleven days shorter than the solar year, so the date moves earlier each Gregorian year, and anyone tracking it against a fixed date in a diary will drift out of alignment within a decade.
The condition applies to the threshold, not to every individual coin. Wealth that dips below nisab briefly and recovers does not usually restart the year in the majority view; wealth that falls below and stays there does. What matters is the position on the anniversary date, which is why the tool asks for balances on a date rather than averages. An individual circumstance — an inheritance received mid-year, a business wound up, a debt written off — needs a person rather than a page.
Debts, Pensions and Business Assets
Trade goods are the least contested of the three. Stock held for resale is zakatable at what it would fetch, not at what it cost, and that includes raw materials and work in progress. Fixed assets used to run the business rather than to be sold — premises, vehicles, machinery — are generally not zakatable, on the reasoning that zakat falls on growing wealth rather than on the tools that produce it.
Debts are the widest divergence. The narrow position deducts only what is actually payable now, on the basis that a mortgage running for twenty more years does not reduce this year's wealth. A widely used contemporary position deducts the instalments falling due in the coming twelve months, which is the default here. A third position deducts the entire outstanding balance, which can eliminate the obligation for anyone with a large mortgage — and it is precisely because that consequence is so significant that the setting should be a considered choice rather than a default someone else made for you.
Pensions turn on whether the wealth is in your possession. Where a fund cannot be accessed for decades and its final value is unknown, one view is that it is not yet yours to give and becomes zakatable when received. Another counts the accessible portion, and a third counts the whole valuation annually. The percentage field lets you apply whichever you follow. If you also give beyond the obligation, our percentage calculator handles voluntary sadaqah quickly, and the tithe calculator covers the flat proportional giving used in other faith traditions, which works on income rather than on accumulated wealth and has no threshold.
Arb Digital publishes hundreds of free calculators across finance, food, health and maths — no sign-up, no limits. If the one you need is missing, tell us and we will look at building it.
Browse All Free Tools Suggest a ToolCommon Mistakes to Avoid
- Leaving the metal prices at their placeholder values — the nisab is a weight of metal, so a stale price produces a wrong threshold and can put you on the wrong side of it.
- Valuing trade stock at cost — goods held for resale are assessed at their resale value, which is usually the higher figure.
- Tracking the zakat date against a Gregorian anniversary — the lunar year is about eleven days shorter, so a fixed calendar date drifts out of alignment year after year.
- Deducting the whole of a long-term mortgage without checking the position you follow — this single choice can change the obligation by an order of magnitude, and it is not the majority contemporary view.
- Counting a debt you will not recover — money owed to you is included only where recovery is reasonably expected.
Related Free Tools From Arb Digital
Value metal holdings by weight and purity with the gold melt value calculator, convert unit records with the weight converter or the grams to ounces converter, and work out proportions quickly with the percentage calculator. The tithe calculator covers proportional giving on income, the budget calculator and savings rate calculator help with planning around a recurring annual obligation, and the free online tools hub lists everything else.
Frequently Asked Questions
Nisab is the minimum level of wealth at which zakat becomes due. It is defined as a weight of metal rather than a sum of money, commonly cited as 87.48 grams of gold or 612.36 grams of silver, so its cash value is that weight multiplied by the current price per gram of the metal you are using.
Recognised institutions differ. Many advise the silver standard because the lower threshold brings more wealth into the obligation, while others hold that the gold standard better represents the level of wealth originally intended. The calculator offers both and a custom weight, and the position you follow is a matter for your scholar or local authority.
The rate on monetary wealth, trade goods and precious metals is conventionally a fortieth, which is 2.5 percent, assessed after a full lunar year of holding wealth at or above nisab. Other categories such as agricultural produce carry different rates, which this page does not cover.
This is one of the widest differences of opinion. A common contemporary position deducts only the instalments falling due in the coming twelve months. A narrower reading deducts only debts payable immediately, and a broader one deducts the full outstanding balance. The calculator exposes all three because the choice changes the result substantially.
Views differ. One position is that wealth you cannot access is not yet in your possession, so it becomes zakatable when received. Another counts the accessible portion only, and a third counts the full valuation each year. The percentage field lets you apply the ruling you follow rather than one chosen for you.
Scholars differ here too. The Hanafi position includes gold and silver jewellery regardless of whether it is worn, while several other schools exempt items in regular personal use. Enter only the weight you consider zakatable under the position you follow.
No zakat on wealth is due for that year, and the calculator says so rather than returning a figure. The obligation resumes when wealth reaches the threshold again and a full lunar year has passed while it remained at or above that level.
No. Zakat al-fitr is a separate obligation tied to the end of Ramadan and is set as a fixed measure of staple food per household member rather than a percentage of wealth, so it is not modelled here.
This page performs arithmetic on figures and positions you supply and is provided for general reference only. It is not a religious ruling, and it is not financial or tax advice. Rulings on nisab, debts, pensions, jewellery and business assets differ between schools of thought and between scholars, and an individual case is settled by a qualified scholar or your local zakat authority, not by a calculator.
