To calculate your running count while card counting, you track the ratio of high to low cards remaining in the deck. Using the Hi-Lo system, cards 2-6 are assigned +1, cards 7-9 are neutral (0), and 10s, face cards, and Aces are assigned -1. As each card is dealt, you adjust your running count by adding or subtracting points based on the value of the card. A positive running count indicates more low cards have been dealt, suggesting that high cards are likely to remain, which favors the player. For multi-deck games, the running count is converted into a true count by dividing it by the number of decks remaining in the shoe. A higher true count indicates a more favorable deck for the player.