# How many Oz is a full gold bar?

A full standard gold bar typically weighs around 400 troy ounces (oz t). However, gold bars come in many different sizes, ranging from 1 gram to 400 oz t. The most common gold bar sizes are:

• 1 oz t
• 10 oz t
• 1 kg (32.15 oz t)
• 12.5 kg (400 oz t)

So a “full” gold bar can range from 1 oz t to 400 oz t, depending on the specific bar. The industry standard “Good Delivery” bar, held by central banks and traded among major financial institutions, weighs 400 oz t.

## What Size is a Standard Gold Bar?

There is no single standard size for gold bars – they come in a variety of weights. However, there are some typical sizes that are widely used:

• 1 gram
• 5 grams
• 10 grams
• 1 troy ounce (oz t) – 31.1035 grams
• 10 oz t
• 1 kilogram (kg) – 32.15 oz t
• 12.5 kg – 400 oz t

The 1 oz t gold bar is one of the most popular sizes for individual investors. Many mints and refineries produce 1 oz t bars, often referred to as “gold rounds.”

For larger investors and institutions, the 400 oz t “Good Delivery” bar is considered the industry standard. The London Bullion Market Association specifies that these bars must weigh between 350 oz t and 430 oz t. Most weigh around 400 oz t to 413 oz t.

Central banks, exchanges, and ETFs typically hold the large 400 oz t bars. Companies like refineries and manufacturers may use smaller bars in the 1-10 oz t range. Individual investors often prefer 1 oz t bars or coins.

### Troy Ounce vs Regular Ounce

When weighing precious metals like gold, the troy ounce measurement is used rather than the avoirdupois ounce. One troy ounce equals 31.1035 grams, while one regular (avoirdupois) ounce is 28.3495 grams.

This means a 1 oz t gold bar weighs slightly more than a 1 oz avdp bar. Going by regular ounces, a “full” 400 oz t gold bar would be equivalent to around 437 regular ounces.

## Common Gold Bar Sizes

Here is an overview of some of the typical gold bar sizes and their weights:

### 1 Gram

Gold bars can be as small as 1 gram. One gram bars from reputable mints allow investors to purchase gold in very small increments. The bars are often imprinted with the weight, purity, and mint marks.

### 5 Gram and 10 Gram

Like 1 gram bars, these small sizes make buying gold affordable in tiny portions. 5 gram and 10 gram gold bars typically come sealed in protective packaging.

### 1 Troy Ounce

The 1 oz t gold bar is one of the most widely traded sizes, available from mints and refineries around the world. Popular 1 oz t bars include:

• PAMP Suisse Fortuna Bar
• Perth Mint Gold Bar
• Royal Canadian Mint Gold Bar
• Johnson Matthey Gold Bar
• Sunshine Minting Gold Bar
• Valcambi Suisse Gold Bar

### 10 Troy Ounces

For investors looking to purchase more than 1 oz of gold, 10 oz t bars offer an affordable option. Like 1 oz bars, these come sealed and should carry identifying marks showing weight and purity.

### 1 Kilogram (32.15 Troy Ounces)

One kilogram gold bars weigh 32.15 troy ounces. Popular brands of 1 kg gold bars include Perth Mint, PAMP Suisse, Credit Suisse, and Metalor. One kg bars offer a larger weight of gold at a lower premium compared to smaller bars.

### 12.5 Kilograms (400 Troy Ounces)

The “Good Delivery” bar weighs between 350 oz t to 430 oz t, with 400 oz t being the most common. Good Delivery bars are pure .995+ gold and meet the specifications for trading on exchanges like the London Bullion Market. They bear the stamps of their manufacturers as well as unique serial numbers.

## Most Common Gold Bar Weights

The following table summarizes some of the most frequently encountered gold bar weights and their corresponding troy ounces:

Gold Bar Weight Troy Ounces
1 gram 0.03215 oz t
5 grams 0.16075 oz t
10 grams 0.3215 oz t
1 oz t 1 oz t
10 oz t 10 oz t
1 kg 32.15 oz t
400 oz t 400 oz t

So while a full standard gold bar is 400 oz t, smaller bars can range from tiny 1 gram sizes up to several kilograms. The variety of weights allows investors of all types to own gold.

## Factors That Determine Gold Bar Size

There are several main factors that influence gold bar sizes:

### Usage

How the gold will be used or traded determines the optimal size of bars. Individual investors want small bars like 1 oz t, while large institutions trade 400 oz t Good Delivery bars. Manufacturers may use 10 oz t or 1 kg bars for ease of use.

### Security

Smaller gold bars allow owners to store significant value in a concealed, portable manner. Large 400 oz t bars stored in bank vaults are more secure for institutions and central banks storing massive quantities of gold.

### Cost

Larger gold bars carry lower premiums per ounce compared to smaller bars. This makes bigger bars more economical for large purchases, while smaller sizes have higher per-ounce costs.

### Liquidity

Popular bar sizes like 1 oz t and 400 oz t are highly liquid. Less common sizes may be harder to resell or exchange through dealers and exchanges.

### Certification

Reputable mints certify gold bars by engraving them with stamps denoting weight and purity. This certification gives buyers assurance when purchasing standard bar sizes.

## Average Gold Bar Purity

Most gold bars labeled as 99.99% pure or 24 karat have actual gold content ranging from 99.95% to 99.99%. Higher purity equals less base metals and more value. Some common purities include:

• 99.95%
• 99.99%
• 99.999%

400 oz t Good Delivery bars have a minimum purity of 99.5% according to the LBMA. Most Good Delivery bars are .995, .999 or higher purity.

Gold bars from refineries like PAMP Suisse are often stamped with weight, purity, serial number and assayer marks certifying their exact gold content. Reputable brands stand behind their guarantees of weight and purity.

## Popular Gold Bar Brands

Some well-known manufacturers and refineries of gold bars include:

• Perth Mint – Australian gold bars
• PAMP Suisse – Swiss-made gold bars
• Valcambi – Swiss precious metals refinery
• Johnson Matthey – British gold refiner
• Sunshine Minting – American precious metals mint
• Credit Suisse – Swiss banking and financial services company
• Asahi Refining – American precious metals refiner
• Metalor – Swiss global gold refinery

These established gold bar brands follow strict quality standards for their products. Buying reputable branded bars provides assurance when investing in physical gold.

There are several options when looking to buy investment gold bars:

• Gold Dealers – Many major gold bullion dealers stock popular bar sizes from reputable mints and refineries.
• Banks – Some banks offer gold bar products to account holders, especially in gold-friendly jurisdictions.
• Mints – Government mints like the Perth Mint and private mints sell gold bars direct to customers.
• Online Retailers – Various online precious metals retailers offer shipping on gold bars and coins.
• Auction Sites – Auction platforms allow buyers to bid on gold bars from private sellers or refineries.

When purchasing gold online, reputable dealers are recommended over unknown sellers. Established mints and refineries stand behind the quality of their branded gold bars.

## Gold Bar Storage

Properly storing physical gold bars is important for security and protecting against damage. Smaller gold bars can be stored at home in a safe, safe deposit box, or home safe. Larger 400 oz t gold bars stored by institutions and central banks are kept in high-security vaults.

Individual investors with substantial gold holdings may want to use secure, insured bullion storage providers or vaults. Storing gold bars with reputable third-party vaulting firms offers both security and insurance against theft or loss.

Investing in gold bars has several potential benefits:

• Physical asset that is tangible and universally recognized
• Small bars provide a portable store of value
• Low premiums compared to gold coins
• Easy to verify purity through markings and branding
• Highly liquid and easy to sell or exchange
• Diverse sizes suit every type of investor from retail to institution

Some downsides to be aware of when investing in gold bars include:

• Bigger bars may have higher absolute premiums
• Not as divisible as gold coins
• Requires more secure storage compared to other assets
• Bars from less reputable sources carry higher risk
• Potential for counterfeit bars with fake markings

Doing due diligence on reputable gold bar dealers and mints minimizes many of these risks. Third-party vaulting and auditing provide further protection when buying investment-grade physical gold.

## Conclusion

A full standard gold bar typically refers to the 400 oz t “Good Delivery” bar traded globally among central banks and major financial institutions. However, gold bars come in a wide variety of sizes from just 1 gram up to 400 ounces.

The 1 oz t gold bar is likely the most common size for individual investors. 10 oz t and 1 kg bars also offer popular larger sizes at affordable prices per ounce. Gold bars provide a tangible, portable, and divisible hard asset that diversifies investment portfolios and serves as a store of value over the long term.