
The weight of Australian coins varies depending on their value and composition. For example, the 50c coin is made of silver and weighs 15.55 grams, while the 5c, 10c, and 20c coins weigh 2.83 grams, 5.65 grams, and 11.31 grams, respectively. The $1 and $2 coins, introduced in the 1980s, are made of 2% nickel, 6% aluminium, and 92% copper, with the $2 coin being thicker than the $1 coin. Commemorative versions of these coins have also been released, with varying mintages.
| Characteristics | Values |
|---|---|
| Number of 5c, 10c and 20c coins in 1 kilogram | 174 |
| Weight of 5c, 10c and 20c coins in grams per dollar | 56.5 |
| Weight of 1 kilogram of 5c, 10c and 20c coins in dollars | $17.70 |
| Number of 50c coins in 1 kilogram | 94.13 |
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What You'll Learn

5c, 10c, and 20c coins weigh 56.5 grams per dollar
The 5c, 10c, and 20c Australian coins have the same weight per value, at 56.5 grams per dollar. This means that to make 100 grams, you would need a collection of these coins with a total value of $1.77 (since 56.5 grams x 1.77 = 100 grams).
One kilogram of any combination of these three coins is worth $17.70. This is because the weight-to-value ratio is the same for these coins, at 0.565g per cent, or 56.5g per dollar. This allows banks to count the value of a collection of any combination of those coins without needing to count the individual pieces.
The 5c, 10c, and 20c coins are made of a similar composition, with about 90% copper and 10% nickel, giving them their ""silver" colour. They are also the same size and shape as the pre-decimal coins that they replaced, such as the sixpence, the shilling "bob", and the florin "two bob".
It is impossible to get exactly 1kg of any of these coins because none of them are an integral division of 1000g. However, a random assortment of these coins can be worth approximately $65.49 per litre.
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94 50c coins make a kilogram
It is not possible to get exactly 100 grams or 1 kilogram of Australian coins because none of them are an integral division of 100 or 1000 grams. However, we can calculate an approximate number of 50 cent coins that would make up a kilogram.
The Australian 50 cent coin is the largest in terms of size and weight of all Australian coins in circulation. The coin weighs approximately 15.55 grams. To calculate how many of these coins would make up a kilogram, we can divide 1 kilogram by the weight of a single coin: 1000/15.55 = 64.31. This means that approximately 64 50-cent coins would make up a kilogram.
It is worth noting that the weight of coins can vary slightly due to manufacturing tolerances and wear, so this number may not be exact. Additionally, the way the coins are arranged can also affect the total weight, as the coin-to-empty-space ratio will change depending on how they are stacked or arranged.
The 50-cent coin is the third-highest denomination coin of the Australian dollar and was introduced in 1969 to replace the round 50-cent coin issued in 1966. The current version is dodecagonal (12-sided) and made of cupronickel, while the original was round and made of 80% silver and 20% copper.
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Commemorative coins are released yearly
The Royal Australian Mint has been issuing commemorative coins since 1927, with new designs released yearly. These coins often commemorate various anniversaries, organisations, and significant events in Australian history. The denominations of these coins have varied, including both Australian pound and decimal currencies. Not every year sees the release of commemorative coins for circulation; some years, such as 1987, 1989, 1990, 1991, 1992, and 2012, only had mint packs issued.
Australia's first commemorative $2 coin was released in 2012 to mark Remembrance Day. The coin features a poppy in the centre on a background of microtext, with the words "REMEMBRANCE DAY" and "LEST WE FORGET". Australia is the second country, after Canada, to circulate coloured commemorative coins.
The issue of commemorative coins with a Kangaroo portrait is relatively rare, with only 11 issues to date: 1984, 1985, 1994, 1995, 1998, 2000, 2004, 2005, 2006, 2007, and 2008.
While commemorative coins are released yearly, the weight of Australian coins is also an interesting topic. One kilogram of any combination of 5c, 10c, and 20c coins is worth $17.70. These coins have a weight-to-value ratio of 56.5 grams per dollar. However, it is impossible to have exactly one kilogram of these coins due to their denominations not being an integral division of 1000 grams.
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Coins feature the monarch
Australian coins have featured the monarch, signifying the country's position as a constitutional monarchy within the Commonwealth of Nations. Following Queen Elizabeth II's death in 2022, King Charles III now appears on new Australian coins, marking a significant transition in the representation of the monarchy. This change upholds Australia's historical ties to the British monarchy.
The tradition of featuring the reigning monarch on Australian currency dates back to the introduction of decimal currency in 1966. Queen Elizabeth II has been a fixture on Australian money since 1953. After her passing, the Royal Australian Mint announced the introduction of the new British monarch, King Charles III, on Australian coins. The first coin to feature his effigy will be the gold Australian dollar, with approximately 10 million coins expected by Christmas.
The new coins will bear the king's left profile and will not feature a crown. This aligns with the demand from banks and maintains the tradition of depicting the reigning monarch's right profile. The image, designed by The Royal Mint in London, is part of the Commonwealth Effigy available for British Commonwealth countries.
While this marks a notable change, the 15.5 billion Australian coins carrying Queen Elizabeth II's image remain legal tender and will continue to circulate for some time. They will be gradually replaced with coins bearing King Charles III's effigy. This transition ensures the continuity of the country's currency and maintains the tradition of featuring the monarch on Australian coins.
The 5¢, 10¢, and 20¢ Australian coins have the same weight-to-value ratio, with 56.5 grams per dollar. However, it is impossible to get exactly 100 grams or 1 kilogram of these coins due to their weights not being an integral division of 100 grams or 1 kilogram.
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$1 and $2 coins are 92% copper
Australian coins have gone through a series of changes since their introduction on February 14, 1966, when they replaced British currencies. The original set of coins included the 50c, 20c, 10c, and 5c denominations, often referred to as "'silver'" coins despite being made of 75% copper and 25% nickel. The 1c and 2c coins, on the other hand, were made of a bronze alloy of 97% copper, 2.5% zinc, and 0.5% tin, and were traditionally called "copper" coins.
Over time, new denominations were introduced, including the $1 and $2 coins, which are made of an alloy of 92% copper and 8% aluminium, also known as Aluminium Bronze or AlBr. These coins were added to the mix to replace the paper $1 and $2 notes, which wore down quickly due to frequent usage. The $1 coin was first introduced in 1986, followed by the $2 coin in 1988.
The $1 and $2 coins stand out with their pale gold colour, distinct from the "silver" coins. The $2 coin features an image of an Australian Aboriginal elder, the Southern Cross, and Australian flora on its reverse side, designed by Horst Hahne and inspired by Ainslie Roberts' artwork.
While the $1 and $2 coins share a similar composition of 92% copper, their weight and value differ. The weight of coins is an important factor in determining their overall worth, as seen with the 5c, 10c, and 20c "silver" coins, which have the same weight-per-value ratio, making it easy to count their value by weight without individually counting each coin.
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Frequently asked questions
It takes approximately 35.43 5¢ coins to make 100 grams.
It takes approximately 17.72 10¢ coins to make 100 grams.
It would take approximately 8.86 20¢ coins to make 100 grams.
1 kilogram of these coins is worth $17.70.
The weight of 1 Australian dollar in coins varies depending on the denomination of coins used.










































