
Unfortunately, the official source from the Monetary Authority of Singapore provided in the context is currently down for , preventing a direct confirmation.
However, to get the most accurate answer, it's crucial to know which version of the Singapore one-dollar coin you're referring to, as its weight has changed significantly over the years.
If you have the current bi-metallic coin in your pocket—the one with a gold-colored outer ring and a silver-colored center featuring the Merlion—you are holding a Third Series coin. This modern coin, in circulation since 2013, weighs 7.62 grams. Its specific weight and composition are part of its advanced security features, making it easy to identify.
You might also be familiar with the previous Second Series coin, which is a solid gold-colored coin featuring the periwinkle flower. This version, used from 1985 to 2012, is noticeably lighter, weighing only 6.3 grams. While still legal tender, it is less common in daily transactions now. Therefore, for the most relevant and up-to-date information, the Singapore one-dollar coin you will encounter most often weighs 7.62 grams.


