Cards 2 to 10 are valued according to their number. Face cards are of the same value, which is 10. Aces can have the value of 1 or 10. In blackjack card suits are of no importance. The value of the ace seems to confuse some players under the "heat of the action". It is a player who determines the value of Aces. You can count the ace as eleven until a count of eleven will put your hand over twenty-one, then you can count the ace as one.