Unfortunately, there is no way to transfer Subway Surfers coins into real money. Subway Surfers coins are a virtual currency that can only be used to purchase in-game items. They cannot be exchanged for real money.
Coins can also increase players' run score, which makes them essential in getting highscores. The points gained from coins are counted in the following equation: number of coins x score multiplier x 2. A simpler way to look at it: each coin is worth 54 points.
