How Much Is a Gold Bar Worth?

Spot price is the global benchmark — the current market price of one troy ounce of pure gold. It's set by trading on commodities exchanges and moves throughout the day. The spot price sets the floor: no gold bar is worth less than its weight in gold at this price.

Weight and purity determine how much gold is actually in the bar. Investment-grade gold bars are .999 fine (99.9% pure) or higher — most bars from major mints like PAMP Suisse, Valcambi, Perth Mint, and the Royal Canadian Mint are .9999 fine. At this purity, the math is simple: weight in troy ounces × spot price = spot value. Use our troy ounce converter to convert between grams and troy ounces.

Dealer premium is the markup above spot that you pay when buying. It covers minting, assaying, packaging, distribution, and the dealer's margin. Premiums scale inversely with size — a 1-gram bar might carry a 20–40% premium, while a kilo bar typically runs 1.5–3%.

Gold bars are produced in a range of sizes for different buyers. Most first-time investors start with a 1 oz bar; the sections below explain why — and when a different size makes more sense.

Small bars are the entry point. A 1-gram bar costs roughly the price of a nice dinner, making gold tangible and accessible. They're widely sold as gifts, collectible pieces, and first-time purchases.

The tradeoff is premiums. Manufacturing a 1-gram bar costs nearly the same as manufacturing a 1-ounce bar, but that cost is spread over far less gold. At 20–40% over spot, small gram bars are the least cost-efficient way to buy gold. They make more sense as gifts or keepsakes than as pure investments.

The 1 troy ounce bar is one of the most widely traded retail sizes. It hits a practical sweet spot: premiums are moderate (typically 3–6%), the bar is widely recognized, and reselling to virtually any bullion dealer is straightforward. One ounce is also the standard quoting unit for gold, so the bar's spot value is simply the spot price.

The 50g and 100g bars offer a step up in size with slightly lower premiums. They're less standard than 1 oz but widely available from mints like PAMP Suisse and Valcambi.

Large bars deliver the lowest retail premiums — typically 1.5–3% for a kilo bar. The capital requirement is significant (a kilo bar is worth $155,333.11 at the posted spot price), but the cost savings per ounce add up.

The 1 kilogram bar is the standard trading unit in many Asian gold markets and is favored by serious investors. At this size, storage and insurance become real considerations — a kilo bar doesn't fit in a sock drawer, and standard homeowner's insurance won't cover it.

The 400 troy ounce bar is the standard unit of the wholesale gold market. These are the bars stored in the vaults at the Bank of England, the New York Fed, and bullion banks worldwide.

The London Bullion Market Association (LBMA) sets the specification: each Good Delivery bar must weigh between 350 and 430 troy ounces, with a minimum fineness of .995 (not .999 — a detail many sources get wrong). Per LBMA standards, they measure approximately 255 × 81 × 37 mm with a trapezoidal cross-section, and weigh roughly 27.4 pounds (12.4 kg). At the posted spot price, a single 400 oz bar is worth $1,932,559.96.

These bars are not practical for individual investors. They trade between institutions, and once a bar leaves the LBMA chain of custody, it must typically be re-assayed before re-entering the wholesale market.

The prices in the table above are spot values — the worth of the pure gold content at the current market price. When you buy a gold bar, you'll pay more than spot. When you sell, you'll typically receive spot or slightly below.

Buying: Every dealer adds a premium to spot. For a 1 oz bar, expect 3–6% over spot. For smaller bars, the premium climbs sharply. A 1-gram bar with a spot value of $155.33 might cost $186.40 from a dealer — that's a ~20% premium. The premium covers the cost of turning raw gold into a minted, assayed, packaged product.

Selling: Reputable bullion dealers typically buy back standard bars at spot or a small percentage below. The buyback spread is narrower for widely recognized bars from major mints (PAMP Suisse, Valcambi, Perth Mint) and standard sizes (1 oz, 10 oz, 1 kg). Always get quotes from at least two dealers.

Bars vs. coins: Gold coins (American Eagles, Canadian Maple Leafs, Krugerrands) carry higher premiums than bars of the same weight — typically 5–10% for a 1 oz coin vs. 3–6% for a 1 oz bar. The extra cost reflects higher minting costs, legal tender status, and broader name recognition. For pure cost efficiency, bars win. For ease of resale and recognition, coins have an edge. Learn more about how melt value is calculated.

Gold is weighed in troy ounces, not the regular (avoirdupois) ounces on a kitchen scale. One troy ounce equals exactly 31.1034768 grams — about 9.7% heavier than a regular ounce at 28.35 grams.

When gold is quoted at a price "per ounce," it always means per troy ounce. Using the wrong ounce in a calculation throws the result off by about 10%. A "1 ounce" gold bar weighs 31.1 grams, not 28.35 grams.

Some dealers also quote prices in pennyweight (dwt), where 1 dwt = 1/20 of a troy ounce = 1.555 grams. Use our troy ounce converter to convert between troy ounces, grams, pennyweight, and other units.

Where to buy. Stick with established bullion dealers — APMEX, JM Bullion, SD Bullion, and local coin shops with solid reputations are common starting points. Look for transparent pricing (premium clearly stated), a published buyback policy, and bars from recognized mints (PAMP Suisse, Valcambi, Perth Mint, Royal Canadian Mint). If a price seems unusually low, be cautious — counterfeit bars exist.

Storage. A home safe works for smaller holdings, but standard homeowner's insurance policies typically have low sub-limits for precious metals — often well under the value of even a single 1 oz bar. Check your policy's scheduled property limits. A bank safe deposit box offers physical security but is not FDIC insured and is only accessible during business hours. Third-party vault services (Delaware Depository, Brink's, and others) provide allocated storage with full insurance, though fees and minimums vary by provider.

Insurance. If you store gold at home, you'll likely need a scheduled personal property rider on your homeowner's or renter's policy to cover the full value. Contact your insurer for exact costs and coverage limits — they vary. For larger holdings, professional vault storage with built-in insurance is often more practical than insuring a home safe.