It is necessary to know the odds when you play blackjack. You can use the calculator to know how the different rules of blackjack affect the advantage of the casino. The house is calculated by the blackjack calculator on the basis of the basic strategy of blackjack.
You know the rules to lower or raise the house edge through the calculator. People have the idea that house edge means that the house always wins. House edge is the percentage that each bet that the house is going to keep when you make that bet a million times.
In the short term, you can win or lose. However, in the long term, it is not possible to escape the math and the betting sites are going to wait since they know that in the long run, the house edge is guaranteed. One way out of this is to become a card counter and flip the edge against the betting site.
Most of the rules have an effect on the house edge calculator. The variations in the rules which are applied to the standard game are either beneficial or not. The beneficial rules of the game are doubling, splitting, surrender, and pre-splitting the edges. Disadvantageous ones are going to limit the options of the players and have double down just by 10-11, no surrender, no re-splits, etc.
The casino is always going to have an edge over the players. Use the trick to reducing this to win the game. In case it is tricky for you to understand how house edge work, you should simply use a blackjack calculator to know your winning chances.