Gold Bar Value Calculator
Find out how much a gold bar is worth based on its weight, purity, and the current spot price of gold. Works for any size — from 1 gram wafers to 400 oz London Good Delivery bars.
Wondering how much a gold bar is worth in 2026? The answer depends on three things: the bar's weight, its purity (often expressed in karats or fineness), and the live spot price of gold. A standard 1 oz .9999 fine bar at a spot price of $2,400/oz is worth about $2,400 in pure metal content, while a full 400 oz London Good Delivery bar at the same price holds roughly $960,000 of melt value. This calculator translates those variables into a concrete melt value plus an estimated retail price that includes typical dealer premiums.
Spot price moves every minute the markets are open, so two identical bars can have meaningfully different values just hours apart. Dealer premiums add another 1%–8% over melt, depending on bar size, brand (PAMP, Valcambi, Perth Mint, Credit Suisse), and whether you are buying or selling. Smaller bars carry higher premiums per ounce; a 1 gram bar can trade 30%+ over melt, while a kilo bar typically trades within 2% of spot. Enter your bar's specs below to see both numbers side by side.
How it works: Enter weight, choose the unit, set the purity, and input the current spot price. The calculator converts weight to troy ounces, multiplies by fineness and spot, then estimates retail value using bar-size-typical premiums.
Counterfeit gold bars are a real and growing problem; tungsten-core fakes can fool weight and visual inspection. For any purchase over $10,000, insist on assay-carded bars from a reputable dealer and consider XRF or ultrasonic verification. U.S. cash transactions of $10,000 or more trigger IRS Form 8300 reporting by the dealer; structuring payments to avoid this is itself a federal crime. Long-term capital gains on physical gold are taxed at up to 28% in the U.S. (collectibles rate), not the 15%–20% rate that applies to stocks — factor this into after-tax return calculations. Spot price is volatile: 1%–3% intraday moves are common, and during macro stress gold can swing 5%+ in a single session. Lock in price quotes with dealers before wiring funds.
How Much Is a Gold Bar Worth in 2026?
Gold bar values are driven by three numbers: weight in troy ounces, purity (fineness), and the live spot price per ounce. Everything else — dealer premium, brand, packaging — is a markup on top of that intrinsic value.
Approximate melt value by bar size (at $2,400/oz spot, .9999 fine)
| Bar size | Pure troy oz | Grams | Melt value | Typical retail premium |
|---|---|---|---|---|
| 1 gram | 0.0321 | 1.0 | $77 | 20%–40% |
| 1/10 oz | 0.0999 | 3.11 | $240 | 8%–15% |
| 1 oz | 0.9999 | 31.1 | $2,400 | 3%–6% |
| 10 oz | 9.999 | 311.0 | $24,000 | 2%–4% |
| 1 kilo (32.15 oz) | 32.147 | 1,000 | $77,153 | 1.5%–2.5% |
| 400 oz (London Good Delivery) | 400 | 12,441 | $960,000 | 0.5%–1.5% |
Major bar brands and typical premium tier (2026)
| Brand | Country | Typical sizes | Premium tier | Notes |
|---|---|---|---|---|
| PAMP Suisse | Switzerland | 1g – 1 kg | Higher | Veriscan assay; Lady Fortuna design popular. |
| Valcambi | Switzerland | 1g – 1 kg, CombiBar | Higher | CombiBar lets you snap off 1g pieces. |
| Perth Mint | Australia | 1g – 1 kg | Mid | Government-backed; certificate-card packaging. |
| Credit Suisse | Switzerland | 1 oz – 1 kg | Mid | Discontinued line; still widely traded. |
| Royal Canadian Mint | Canada | 1 oz – 400 oz | Mid | RCM-stamped LGD bars common in vaults. |
| Generic / no-brand | Various | 1 oz – 100 oz | Lower | Cheapest melt-adjacent option; verify assay. |
What Determines a Gold Bar's Price?
Three variables set the floor value of any gold bar. First, gross weight — the total mass stamped on the bar, expressed in grams, troy ounces, kilograms, or regional units like tola. Second, fineness — the proportion of that mass that is actually pure gold, expressed as a decimal like .9999 (99.99%) or as a karat figure (24K, 22K, 18K). Third, the spot price of gold, quoted in U.S. dollars per troy ounce on COMEX or LBMA. Multiply weight (in troy oz) × fineness × spot, and you get the bar's melt value — the irreducible metal content worth.
Why Smaller Bars Cost More per Ounce
A 1 gram PAMP bar at $2,400/oz spot has only about $77 of gold in it, yet it might retail for $105 — a 36% premium over melt. A 1 kilogram bar at the same spot has roughly $77,150 of gold and might retail for $78,700, just 2% over melt. Why? Refining, stamping, assay-card packaging, and dealer handling all cost a roughly fixed dollar amount per bar regardless of size. Spreading that fixed cost over 1 gram is expensive per ounce; spreading it over a kilo barely registers. Rule of thumb: if you're buying for pure metal exposure, buy the largest bar you can responsibly store and insure.
How Karat and Fineness Map to Each Other
Karat measures purity in 24ths. 24K is theoretically 100% pure, but in practice the highest commercial purity is .9999 fine (sometimes .99999, called five-nines). 22K equals .9166 fine (22/24), 18K equals .750 (18/24), and 14K is .5833. Investment-grade bullion bars are almost always .999 or .9999. If your bar is stamped 22K or lower, it is likely jewelry-grade rather than investment-grade — still valuable, but expect a different buyer pool and a lower premium structure. Always check both the karat stamp and the assay certificate when assessing a bar's purity.
Understanding the Calculator's Inputs and Edge Cases
The calculator converts your entered weight into troy ounces, multiplies by the fineness fraction, then multiplies by your spot price to get melt value. If you enter weight in grams, it divides by 31.1035 to convert. If you select 'Buying from a dealer', it adds a size-tiered premium (15% for sub-half-ounce, scaling down to 1.2% for 400-oz bars). 'Selling' applies a negative spread instead — dealers buy back below spot. 'Melt value only' strips all premiums and shows pure intrinsic value, useful if you're refining or comparing to scrap. Negative or zero inputs produce a zero result; the calculator does not extrapolate beyond plausible bar sizes.
How Spot Price Is Set and Where to Check It
Gold spot price is the price for immediate delivery of one troy ounce of .995-fine gold, set continuously by trading on COMEX (New York), LBMA (London), and the Shanghai Gold Exchange. The LBMA Gold Price fixing happens twice daily at 10:30 and 15:00 London time and is the global benchmark for institutional contracts. Retail-facing sources like Kitco, GoldPrice.org, and APMEX update continuously during market hours. For this calculator, use the latest available number — gold can move 1%–3% in a single day during volatile periods, which on a kilo bar is hundreds of dollars.
Common Mistakes to Avoid
First, do not confuse troy ounces with avoirdupois (regular) ounces — a troy ounce is 31.1 grams, about 10% heavier than the 28.35 g avoirdupois ounce. Always assume troy when dealing with bullion. Second, do not pay 1 oz premium pricing on a 1 oz bar that is actually 31.1 g of 22K alloy — that's only 28.5 g of pure gold. Third, beware of fake bars: tungsten has nearly identical density to gold and is the metal of choice for sophisticated counterfeits. Always buy assay-carded bars from reputable dealers, and consider an XRF or ultrasound test for large purchases over $10,000.
Tax and Reporting Considerations
In the U.S., gold bullion held over one year is taxed as a collectible at up to 28% federal capital gains, higher than the 15%–20% long-term rate on stocks. Cash purchases over $10,000 trigger an IRS Form 8300 dealer report. Sales of certain bar sizes — notably 1 kg, 100 oz, and any size of 0.995+ fine bars over the reporting threshold — may trigger a 1099-B from the dealer. Outside the U.S., VAT rules vary widely: investment-grade gold is VAT-exempt in the EU and UK but taxed in many other regions. Consult a tax professional before making large bullion transactions.
How This Calculator Works: Methodology & Parameter Explanations
Core formula:
Melt Value = (Weight × UnitToTroyOz) × Fineness × SpotPrice; Retail Value = Melt × (1 + Premium%)where:
Weight— Bar weight as stamped (user-selected)UnitToTroyOz— Conversion factor to troy ounces (oz t / unit)Fineness— Purity as a decimal (e.g. 0.9999)SpotPrice— Live gold spot price ($/troy oz)Premium%— Size-tiered dealer markup or discount (%)
How to apply: The melt value is the metal-content floor. To estimate what you'll actually pay (or receive), apply the size-tiered premium: smaller bars trade at higher premiums per ounce because refining and packaging costs are roughly fixed per bar. Compare retail value across two or three dealers before transacting.
Worked example: A 10 oz PAMP .9999 bar at a $2,500/oz spot price: melt = 10 × 0.9999 × $2,500 = $24,997.50. At a typical 3.5% buy-side premium, retail ≈ $25,872. If you sold the same bar to a dealer at a 1.5% buyback discount, you'd receive about $24,622 — a round-trip spread of $1,250.
Alternative formulas
Per-gram method: (Grams × Fineness × Spot) / 31.1035
When to use: When the bar is denominated in grams and you want to skip the troy-ounce conversion step mentally.
LBMA fix-based: Use AM or PM LBMA Gold Price instead of live spot
When to use: For institutional contracts and large transactions where the benchmark fixing is the agreed reference.
Parameter explanations
| Input | Unit | What it means | Impact on results |
|---|---|---|---|
| Bar weight | user-selected (g, oz t, kg, tola) | The raw mass stamped on the bar or its assay card. | Linear — doubling the weight doubles both melt and retail value. |
| Weight unit | — | The unit system the entered weight is in; converted internally to troy ounces. | Choosing grams when you meant troy ounces under-counts value by ~31x; always verify the stamp. |
| Purity / fineness | — | Fraction of the bar that is pure gold (24K = .9999, 22K = .9166, 18K = .750). | Linear multiplier. A 22K bar is worth ~92% of an otherwise identical 24K bar's melt. |
| Current spot price | $/troy oz | Live market price of one troy ounce of pure gold. | Linear — a 1% move in spot is a 1% move in both melt and retail value. |
| Buying or selling | — | Direction of the transaction; determines whether to add a premium or subtract a discount. | Switches premium sign and magnitude; the buy-sell spread is typically 3%–10% round-trip depending on size. |
Assumptions
Spot price is quoted in U.S. dollars per troy ounce, consistent with COMEX and LBMA conventions.
Premium tiers are typical 2026 market ranges, not dealer-specific quotes. — Premiums fluctuate with retail demand, mint supply, and brand. During buying frenzies (e.g. 2020, 2022), 1 oz bar premiums spiked from 4% to over 10%.
The headline number in the keyword ('how much is a gold bar') has no single correct answer. — Gold bars range from 1 gram (~$80) to 400 oz (~$960,000). The defaults shown are example values; enter your bar's actual specs for a real estimate.
Fineness mappings assume standard industry stamps; non-standard or counterfeit stamps require independent assay.
Tola and other regional units use their internationally recognized definitions (1 tola = 11.6638 g).
How to use this calculator
- Identify your bar's stamp — Read the weight, unit, and purity stamps on the bar itself or its assay card. PAMP and Valcambi bars show all three on the front.
- Look up the current spot price — Check Kitco, GoldPrice.org, or your brokerage for the live $/troy oz spot. Note the timestamp — gold moves intraday.
- Choose buy, sell, or melt — Pick the scenario that matches your situation. Melt shows the intrinsic floor; buy/sell apply size-typical premiums.
- Compare with 2–3 dealer quotes — Use the retail value as a sanity check, then call APMEX, JM Bullion, and a local coin shop for actual quotes before transacting.
- Plan storage and insurance — Any bar over a few thousand dollars should be stored in an insured vault or a bolted, fireproof safe with a rider on your homeowner's policy.