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| Russian Empire one ruble banknote |
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| Russian Empire one ruble bill |
The ruble has been the Russian unit of currency for about 500 years. From 1710, the ruble was divided into 100 kopeks.
The amount of precious metal in a ruble varied over time. In a 1704 currency reform, Peter I standardized the ruble to 28 grams of silver. While ruble coins were silver, there were higher denominations minted of gold and platinum. By the end of the 18th century, the ruble was set to 4 zolotnik 21 dolya (almost exactly equal to 18 grams) of pure silver or 27 dolya (almost exactly equal to 1.2 grams) of pure gold, with a ratio of 15:1 for the values of the two metals. In 1828, platinum coins were introduced with 1 ruble equal to 77⅔ dolya (3.451 grams).
On 17 December 1885, a new standard was adopted which did not change the silver ruble but reduced the gold content to 1.161 grams, pegging the gold ruble to the French franc at a rate of 1 ruble = 4 francs. This rate was revised in 1897 to 1 ruble = 2⅔ francs (0.774 grams gold).