How Much Does a Gold Bar Weigh?
The standard Good Delivery gold bar weighs 400 troy ounces (27.4 lbs / 12.4 kg). Gold bars for individual investors range from 1 gram to 1 kilogram. Gold is one of the densest metals on earth at 19.32 g/cm³ — a single troy ounce bar is only about the size of a credit card but 1.6 mm thick.
Gold Spot Price
Per troy ounce · updated hourly via Metals-API
400 oz Bar Value
Standard Good Delivery bar (27.4 lbs)
1 kg Bar Value
Most popular institutional investor bar
Gold Bar Weight Chart — Complete Size Guide
All 12 standard gold bar sizes with weights in every unit and live spot-price valuations.
| Bar Size | Troy Oz | Grams | Kilograms | Pounds | Current Price |
|---|---|---|---|---|---|
| 1 Gram | 0.032 | 1 | 0.001 | 0.002 | $149.58 |
| 2.5 Gram | 0.080 | 2.5 | 0.003 | 0.006 | $373.96 |
| 5 Gram | 0.161 | 5 | 0.005 | 0.011 | $752.59 |
| 10 Gram | 0.321 | 10 | 0.010 | 0.022 | $1,500.50 |
| 20 Gram | 0.643 | 20 | 0.020 | 0.044 | $3,005.67 |
| 1 Troy OzPOPULAR | 1.000 | 31.1 | 0.031 | 0.069 | $4,674.45 |
| 50 Gram | 1.607 | 50 | 0.050 | 0.110 | $7,511.84 |
| 100 Gram | 3.215 | 100 | 0.100 | 0.220 | $15,028.35 |
| 10 Troy Oz | 10.000 | 311 | 0.311 | 0.686 | $46,744.49 |
| 1 KilogramPOPULAR | 32.150 | 1,000 | 1.000 | 2.205 | $150,283.52 |
| 100 Troy Oz | 100.000 | 3,110 | 3.110 | 6.857 | $467,444.86 |
| 400 Troy OzGood Delivery | 400.000 | 12,441 | 12.441 | 27.430 | $1,869,779.44 |
Prices based on spot gold price $4,674.45/oz · Last updated Apr 5, 2026 via Metals-API
How Much Does the Standard Bank Gold Bar Weigh?
The LBMA Good Delivery bar — the gold standard of gold bars.
The standard bank gold bar — officially known as the LBMA Good Delivery bar — weighs approximately 400 troy ounces (12.4 kg / 27.4 lbs). The London Bullion Market Association permits an acceptable weight range of 350 to 430 fine troy ounces, with a minimum fineness of 99.5% pure gold.
Each bar must carry four mandatory markings: the refiner's hallmark, the bar's serial number, the assay (fineness) stamp, and the year of manufacture. These bars are held by central banks, sovereign wealth funds, and institutional bullion dealers. They are not typically sold directly to individual investors due to their cost (currently approximately $1,869,779.44) and the specialized secure storage they require.
Gold Bar Sizes for Investors (1 Gram to 1 Kilo)
Common retail sizes with everyday object comparisons and buying guidance.
Everyday Weight Comparisons
1 gram
Weighs about as much as: A standard paperclip
Typical premium: 15–30% over spot
1 troy ounce (31.1g)
Weighs about as much as: A slice of bread
Typical premium: 2–4% over spot
100 grams
Weighs about as much as: A smartphone
Typical premium: 1–3% over spot
1 kilogram (2.2 lbs)
Weighs about as much as: A 1-liter bottle of water
Typical premium: 1–2% over spot
Which Size Should You Buy?
Budget Under $5,000
10g or 20g bars
Accessible entry point with moderate premiums (5–8%).
Budget $5,000–$50,000
1 oz bars
Best combination of liquidity, affordability, and low premiums (2–4%).
Budget $50,000+
10 oz or 1 kg bars
Lowest premiums available (under 2%), most gold per dollar.
Gold Density and Why Gold Bars Are So Heavy
The science behind gold's extraordinary weight — 19.32 g/cm³.
Gold has a density of 19.32 g/cm³, making it one of the densest naturally occurring elements. A gold bar feels startlingly heavy for its size — a 1 kg bar is roughly the size of a smartphone but weighs as much as a liter of water.
Gold
19.32
g/cm³
Lead
11.34
g/cm³
Silver
10.49
g/cm³
Iron
7.87
g/cm³
This extreme density is also why weight is one of the most reliable ways to detect counterfeit gold bars. Tungsten (19.25 g/cm³) is the only common metal with a density close to gold, which is why sophisticated fakes use tungsten cores — but even then, precise measurements can detect the difference.
Gold Bar Weights Around the World
International gold weight standards used in different markets and exchanges.
| Standard | Region | Grams | Troy Oz | Notes |
|---|---|---|---|---|
| Tola | India, Pakistan, Middle East | 116.64 | 3.750 | Traditional unit still used in South Asian gold markets |
| Tael (Liang) | China, Hong Kong, Taiwan | 37.429 | 1.203 | Standard for Chinese Gold & Silver Exchange (Hong Kong) |
| Baht | Thailand | 152.44 | 4.901 | Thai gold standard; 96.5% purity (23.16K) is the local norm |
| COMEX Bar | United States (Commodity Exchange) | 3,110 | 100.0 | Standard futures-deliverable bar, typically 99.5%+ purity |
| Kilobar | International | 1,000 | 32.15 | Popular institutional and investor bar worldwide |
| Good Delivery | International (LBMA) | 12,441 | 400.0 | 350–430 oz acceptable range; 99.5% minimum fineness |
How Much Is a Gold Bar Worth? (By Size)
Enter any weight to see the current gold value based on live spot prices.
Gold Weight Calculator
Enter any weight to see current gold value
Current Gold Value
$4,674.45
1.0000 troy oz at $4,674.45/oz spot
How to Detect a Fake Gold Bar Using Weight
Weight verification is your first line of defense against counterfeits.
Every legitimate gold bar has an exact stamped weight that should match when measured on a precision scale. Any variance beyond the manufacturer's stated tolerance is a red flag. For LBMA-approved bars, the weight must match the stamped figure to within the published tolerance (e.g., ±0.025 oz for a 1 oz bar).
Weigh the Bar
Use a precision scale accurate to 0.01g. Compare against the bar's stamped weight.
Measure Dimensions
Verify length, width, and thickness match the manufacturer's published specifications.
Calculate Density
Divide weight by volume (water displacement). Pure gold should read 19.32 g/cm³ ± 0.1.
For high-value purchases, always buy from LBMA-accredited dealers and request an assay certificate. Professional testing (XRF spectrometry or ultrasonic thickness gauging) provides the highest level of confidence.
Silver Bar Sizes (Quick Reference)
Common silver bar sizes with weights and live spot-price valuations.
| Bar Size | Troy Oz | Grams | Pounds | Current Price |
|---|---|---|---|---|
| 1 Troy Oz | 1.00 | 31.1 | 0.069 | $73.01 |
| 5 Troy Oz | 5.00 | 155.5 | 0.343 | $365.07 |
| 10 Troy Oz | 10.00 | 311 | 0.686 | $730.15 |
| 100 Troy Oz | 100.00 | 3,110 | 6.857 | $7,301.50 |
| 1 Kilogram | 32.15 | 1,000 | 2.205 | $2,347.43 |
Prices based on spot silver price $73.01/oz
Frequently Asked Questions
Common questions about gold bar weights, sizes, and values.
The standard "Good Delivery" gold bar, as defined by the London Bullion Market Association (LBMA), weighs 400 troy ounces — approximately 27.4 pounds (12.4 kg). These bars have an acceptable weight range of 350 to 430 fine troy ounces and must be at least 99.5% pure gold. They are the bars held by central banks and traded between institutional dealers.
A 1 troy ounce gold bar weighs exactly 31.1035 grams (0.0685 pounds). This is the most popular size for individual investors due to its balance of low premiums and manageable cost. Note that a troy ounce is heavier than a standard (avoirdupois) ounce — 1 troy ounce equals approximately 1.097 standard ounces.
At the current gold spot price, a standard 400 troy ounce Good Delivery gold bar is worth approximately $1,869,779. The exact value fluctuates with the spot price of gold, which changes throughout the trading day. These bars are not typically sold to individual investors and require institutional-level secure storage.
A 1 kilogram gold bar weighs 1,000 grams, which is equivalent to 32.15 troy ounces or about 2.205 pounds. The 1 kg bar is one of the most popular sizes for serious investors, offering some of the lowest premiums over spot price (typically 1–2%).
The heaviest gold bar in the world weighs 250 kilograms (551 pounds or 8,037.5 troy ounces). It is on display at the Toi Gold Museum in Shizuoka, Japan. Cast by Mitsubishi Materials Corporation, this bar holds the Guinness World Record for the largest manufactured gold bar.
The weight in pounds depends on the bar size. The most common sizes: a 1 gram bar weighs 0.002 lbs, a 1 troy ounce bar weighs 0.069 lbs, a 100 gram bar weighs 0.22 lbs, a 1 kilogram bar weighs 2.205 lbs, and the standard Good Delivery bar weighs 27.43 lbs. At current prices, that 27.43-pound bar is worth approximately $1,869,779.
Spot prices sourced from Metals-API and updated hourly. INGOTX is not a dealer — we provide neutral price data and educational content.
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