If you are looking for BTC casino with BlackJack then you can possibly try bitcoinrush.io as they have BlackJack .
Just for references because your thread is about strategy so I would suggest to follow up this strategy
http://wizardofodds.com/games/blackjack/strategy/calculator/
This is as references to calculate the house edge of the house because each house has a different BlackJack rules that might differ the edge
http://wizardofodds.com/games/blackjack/calculator/
How to use the calculator?
I absolutely have no idea which calculator are you referring to so I will just answer both of them.
For the strategy calculator, you simply put in the general rules of the house like Soft17 rules, number of decks and ability to double after split ( more of this is available on the site ). As I have stated that each house has a different rules as some sites allow double after split while some dont
After you put in the general rules , you simply follow the pattern listed on the site. All sort of information is available there and you will just need to follow the pattern of when to hit, stand or either double your bet*
FYI, hard means no ace on your hands while soft means there is an ace on your hands ( ace counts as either one or eleven )
As for the house edge calculator, this is the same thing as the strategy calculator however this is just used to know the house edge of the house ( different rules = different house edge ). Therefore with this calculator , you can find a house with the lowest house edge to ensure higher chance to win *
*Disclaimer : lucks play a vital part in gambling as these strategies might also fail