Amazing coin facts

Do you have any leftover coins from traveling abroad? We exchange foreign coins for cash in three easy steps. And speaking about coins, here are some weird and amazing coin facts:

Some coins float

You may not believe this fact but it’s true. Some coins float. Coins made of aluminium (aluminum) such as the Japanese 1 yen coin and the Austrian 10 groschen coin are so lightweight that they can be balanced on the water surface. You may need a few attempts but eventually you’ll be able to float these coins on water.

Floating coins on water is a common classroom experiment to illustrate that the surface tension of water is enough to float a small coin.

floating coin

Heads or tails? Most likely heads.

This coin fact may seem unlikely but it is scientifically proven to be true: The chance of a coin coming up as started is 51%, more than half. Meaning, if you flip a coin starting with heads up, there is a 51% chance the the coin-toss result is heads up. This was proven by Stanford professor Persi Dianconis. Source: Dynamical bias in the coin toss.

More people start a coin toss with heads facing up, compared to tails. Therefore, heads is a more likely outcome than tails in a coin toss up.

25 Cents coin United States Dollar (quarter)
25 Cents coin United States Dollar (quarter)