Types:
Copper Coin (CP), Silver Coin (SP), Electrum Coin (EP), Gold Coin (GP), Platinum Coin (PP)
1 Platinum Coin = 10 Gold Coins
1 Gold Coin = 10 Silver Coins
1 Silver Coin = 10 Copper Coins
Electrum Coins were not commonly used; one was worth five Silver Coins.
A standard coin weighed about one-third of an ounce, so fifty coins weighed about one pound.
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DND Currency Purchasing Power Table (for reference only):
1 Copper Coin = 1 pound of wheat
2 Copper Coins = 2 pounds of flour or one chicken
5 Copper Coins = 1 pound of salt
1 Silver Coin = 1 pound of iron or 1 square yard of canvas
5 Silver Coins = 1 pound of copper or 1 square yard of cotton cloth
1 Gold Coin = 1 pound of ginger or one goat
2 Gold Coins = 1 pound of cinnamon or pepper, or one sheep
3 Gold Coins = 1 pound of cloves or one pig
5 Gold Coins = 1 pound of silver or 1 square yard of linen
10 Gold Coins = 1 pound of silk or one cow
15 Gold Coins = 1 pound of saffron or one bull
50 Gold Coins = 1 pound of gold
500 Gold Coins = 1 pound of platinum
Note: The above was taken from Chapter 6 of the 2024 edition of the Dungeon Master's Guide.
Nearly every major power in Faerun had its own accepted currency, minting coins in distinctive styles that carried not only the value of their metal, but also the value of the influence they represented.
Most coins of pure composition and standard weight could circulate throughout the continent, though not every city-state or nation bothered to mint every type of coin.
Some of the most common and widely accepted coinages in the realms were summarized below. Each group was listed in order of value: Copper Coin, Silver Coin, Electrum Coin, Gold Coin, and Platinum Coin, if any.
Regardless of where a coin came from, most people traveling through Faerun used the name assigned to it when it was issued. Zhentil Keep was the sole exception—for some reason, every Zhentil coin had its own vulgar nickname.
: Fander, Taran, Centaur, Danter, Roldan
: Thumb, Falcon, Blue Eye, Golden Lion, Tricrown
: Steelpence (an iron coin), Raven (triangular), Blue Eye (diamond-shaped), Noble (pentagonal)
: Glint, Shield, Sword, Dragon, Unicorn
: Nib, Shard, Sambar, Dragon, Sun
Keep: Fang ("Dung-Piece"), Talon/Naal ("Flea-Bit"), Tarenth ("Hardhammer"), Glory ("Weeping Wolf"), Platinum Glory ("Flat Metal Gem")
Silverymoon also minted two special coins: the "moon" and the "Eclipsed Moon."
The moon was a bright blue crescent-shaped coin. It was worth 2 Thal in Silverymoon and its surrounding settlements, but only 1 Thal elsewhere. The Eclipsed Moon looked like a silver-gold moon set against a darker silver shadow, together forming a round coin. It was worth 5 Thal in the city, but only 2 Thal elsewhere.
Waterdeep also had its own coin. The "Taol" was a square brass coin worth 2 Dragons in the city, though almost no one who did not trade with Waterdeep recognized its value. Those conducting business in Waterdeep usually exchanged Taol for standard coinage before traveling elsewhere.
The "Harbor Moon" was a palm-sized crescent-shaped Platinum Coin inlaid with silver-gold. It was worth 50 Dragons in the city and 30 Dragons elsewhere. It was usually used for the purchase and sale of large quantities of goods, which was where its name came from. Both Taol and Harbor Moons had holes in them so their owners could string multiple coins together.
Baldur's Gate established standards for minting "Trade Bars." A Trade Bar was a cast block of metal, usually silver, used in place of large quantities of coinage or gems for high-value transactions. The most common Trade Bar weighed 5 pounds and measured 6 inches long, 2 inches wide, and 1 inch thick. Each bar was worth 25 gp.